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    A novel MIL-101(Cr) acidified by silicotungstic acid and its catalytic performance for isomerization of n-heptane
    China Petroleum Processing & Petrochemical Technology    2022, 24 (1): 68-80.  
    Abstract422)      PDF(pc) (1596KB)(48)       Save
    0.4%Pt/xSTA-MIL-101(Cr) metal-acid bifunctional catalysts were prepared by impregnation using STA-MIL-101(Cr) as the support. The synthesized samples were verified to exhibit a typical octahedral structure of MIL-101(Cr) and the pore structure were arranged orderly. The specific surface area of the samples was extremely high and the samples were micro-mesoporous composite materials. Silicotungstic acid could retain its Keggin structure in the 0.4%Pt/xSTA-MIL-101(Cr) samples and the catalyst possessed moderately strong Br?nsted acid sites. Besides, the dispersion of Pt particles in MIL-101(Cr) was relatively high. n-Heptane isomerization was first used as a probe to test the novel 0.4%Pt/xSTA-MIL-10(Cr) catalyst. Compared with the conventional silicate catalysts, the catalytic performance of 0.4%Pt/30wt%STA-MIL-101(Cr) was significantly improved with n-heptane conversion of 58.93% and iso-heptane selectivity of 95.68%, respectively, when the reaction time was 2 h at the reaction temperature of 260 oC. The catalyst could still maintain a relatively high catalytic performance during the reaction time of 5 h. Compared with the non-noble metal catalysts, the catalytic efficiency is relatively high. The mechanism model of n-heptane isomerization over 0.4%Pt/xSTA-MIL-101(Cr) catalyst was established.
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    Crystallization Process in Petrochemical Industry
    Dejiang ZHANG Yingqi Fan Li Xie Huidian Ding Hao WANG
    China Petroleum Processing & Petrochemical Technology    2021, 23 (2): 1-10.  
    Abstract391)      PDF(pc) (734KB)(370)       Save
    Crystallization is a widely used product refining unit operation. Understanding the characteristics of crystallization process in petrochemical industry is helpful for selecting and designing new crystallization process. This review briefly introduces the characteristics of crystallization process, summarizes the crystallization processes applied in petrochemical industry, and discusses some points for crystallization process design. Crystallization in petrochemical process is mainly used in the purification of polymer monomer, and it is often one operation in the whole refining process. Designing a reasonable crystallization process requires consideration of the safety, feasibility, and economy of the process from an overall perspective.
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    Modeling and optimization of ethane steam cracking process in an industrial tubular reactor with improved reaction scheme
       2020, 22 (4): 117-125.  
    Abstract319)      PDF(pc) (639KB)(626)       Save
    Ethane steam cracking process in an industrial reactor was investigated. A 1-demsional (1D) steady-state model was developed firstly by using an improved molecular reaction scheme and then simulated in Aspen Plus. A comparison of model results with industrial data and previously reported results showed that the model can predict the process kinetics more accurately. In addition, the validated model was used to study the effects of different process variables, including coil outlet temperature (COT), steam-to-ethane ratio and residence time on ethane conversion, ethylene selectivity, products yields and coking rate. Finally, steady-state optimization was conducted to the operation of industrial reactor. The COT and steam-to-ethane ratio were taken as decision variables to maximize the annual operational profit.
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    Comparison of Extractive Distillation and Pressure-Swing Distillation for Methanol and Acetonitrile Separation
       2020, 22 (4): 137-146.  
    Abstract249)      PDF(pc) (1263KB)(599)       Save
    In the present work, a comparative study of the extractive distillation and pressure swing distillation for methanol-acetonitrile azeotropic separation is performed for the first time. Different separation alternatives, including the conventional extractive distillation, the extractive distillation with vapor or liquid side-stream, the pressure-swing distillation with or without full heat integration, and the heat-pump assisted pressure-swing distillation are rigorously simulated and optimized based on the minimum total annual cost (TAC) via the sequential iterative strategy. The results show that TAC and CO2 emission of the new extractive distillation with vapor side-stream (Vapor-SED) are similar to that of the extractive distillation with liquid side-stream (Liquid-SED). Furthermore, the Vapor-SED and Liquid-SED gives 30.01% and 30.56% reduction in TAC and 23.32% and 23.49% reduction in CO2 emission, respectively, over the most competitive fully heat-integrated PSD configuration. Hence, extractive distillation with vapor or liquid side-stream appears to be better option economically and environmentally for separation of methanol and acetonitrile.
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    Insights into the Reaction Network and Mechanism of Green Aerobic Oxidative Esterification of Methacrolein over Different Heterogeneous Catalysts
    Li Chenhao, Xia Changjiu, Liu Yujia, Huang Kaimeng, Peng Xinxin, Liu Jinsheng, Lin Min, Zhu Bin, Luo Yibin, Shu Xingtian
    China Petroleum Processing & Petrochemical Technology    2021, 23 (3): 1-11.  
    Abstract237)      PDF(pc) (848KB)(263)       Save
    The oxidative esterification of methacrolein (MAL) is an important way to prepare high-valued methyl methacrylate (MMA), but this process is ultra-complex, due to the highly reactivity of both C=O and C=C bonds within MAL. In order to further improve the selectivity of MMA selectivity, the reaction network and mechanisms over different catalysts have been profoundly investigated in this paper. Five kinds of reactions are involved in this process, including (a) hemiacetal/acetal reaction; (b) aerobic oxidation of aldehyde/alcohol; (c) alkoxylation of C=C double bond; (d) Diels-Alder reaction; (e) hydrogenation reaction of double bond/ carbonyl. Among them, Diels-Alder reaction of MAL is noncatalyzed, and Br?nsted acid sites favor promoting hemiacetal/acetal reaction of MAL with methanol, while alkaline sites enhance the alkoxylation of C=C bond with methanol. In particular, by using Pd-based catalysts, several kinds of hydrogenated products are formed, hence with lower MMA selectivity than those of Au-based catalysts. Notably, it is of necessary to match the hemiacetal reaction of MAL with methanol to and aerobic oxidation of hemiacetal, which is relevant with the amount of Br?nsted acid and redox sites. Consequently, this work provides a good guidance for the further design of both catalysts and processes in future.
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    Investigation on Organic Solvent Free Toluene Oxidative Bromination Reaction Catalyzed by HTS Zeolite
    Peng Xinxin XIA Chang-Jiu Lin Min Zhu Bin Luo Yibin Shu Xingtian
       2020, 22 (4): 1-9.  
    Abstract201)      PDF(pc) (877KB)(534)       Save
    Hollow titanium silicalite (HTS) zeolite catalyzed toluene oxidative bromination in aqueous medium without the need for organic solvent under mild conditions by employing H2O2 and HBr was investigated. A high toluene conversion (90.7%) and high selectivity of mono-bromotoluene (99.0%) was achieved under optimal reaction conditions. UV-Raman spectroscopy was applied for the mechanism study and the result reveals that HTS is efficient for catalyzing the HBr and H2O2 oxidation reaction and producing abundant active bromine species, which further facilitate the toluene electrophilic bromination reaction. A two-step toluene bromination reaction mechanism involving HTS catalyzed active bromine species “generation-storage-utilization” process is proposed based on the Raman results.
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    Recent Progresses on Optimal Design of Heat integrated water allocation network
    Zhang Chijin, Ren Congjing, Liao Zuwei, Sun Jingyuan, Wang Jingdai, Yang Yongrong
    China Petroleum Processing & Petrochemical Technology    2021, 23 (3): 69-75.  
    Abstract197)      PDF(pc) (577KB)(189)       Save
    It is well known that the process industry is an energy-intense and water-consuming industry and is the main source of industrial water consumption and energy in China. Energy integration and mass integration are important approaches to achieve energy saving and emission reduction in the process industry. Generally, the methods can be classified into two groups: conceptual design methods and mathematical programming methods. The former includes mainly graphical methods based on pinch technology that is operated easily. A feasible solution can be quickly obtained. Conceptual design methods are sequential in nature including targeting and design two steps. The latter is based on superstructure optimization and corresponding algorithm is adopted to solve the model. The trade-offs and connections among the entire network can be established and explored. Multiple factors can be considered and optimized simultaneously by mathematical programming methods. This paper describes the synthesis of heat integrated water allocation networks (HIWAN) based on both conceptual design methods and mathematical programming methods systematically. In addition, the characteristics and shortcomings of the existing research methods are summarized, and the future research direction is prospected.
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    Sun Lijie, Fan Yaming: Dong Songtao, Xian Ce, Long Xiangyun, Li Dadong
    China Petroleum Processing & Petrochemical Technology    2021, 23 (1): 1-9.  
    Abstract194)      PDF(pc) (1573KB)(366)       Save
    Three different zeolite catalysts with different pore sizes (MFI-type, BEA-type, and FAU-type zeolites) have been prepared. The influence of different zeolite catalysts on reactivity and product shape selectivity of tetralin is investigated. Clear differences are observed in the reactivity of tetralin and distribution of products produced by different catalysts. The diffusion and adsorption of the reactant tetralin and its intermediates, n-butylbenzene and 1-methyl indan, under the reaction conditions are calculated using molecular simulation methods. Combining simulation results and experimental observations, it is shown that the difference in diffusion coefficient and competitive adsorption capacity can explain the reactivity of tetralin and the selectivity of products. The steric hindrance of MFI-type zeolite mainly limits the key step of ring opening of tetralin, leading lower selectivity of ring-open products. N-butylbenzene molecules diffuse sufficiently fast in the large pores of FAU-type zeolite and the weak adsorption capacity of n-butylbenzene leads to its insufficient cracking. In addition, it also explains the reason that BEA-type zeolite has the best BTX selectivity, because it can satisfy both good ring-opening activity and sufficient butylbenzene cracking depth. Key words: hydrocracking; tetralin; molecular simulation; diffusion; competitive adsorption.
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    Application of a new catalyst deactivation model for residue hydrotreating
    China Petroleum Processing & Petrochemical Technology    2021, 23 (2): 11-20.  
    Abstract183)      PDF(pc) (2154KB)(259)       Save
    This article reports a new catalyst deactivation model for residue hydrotreating technology (RHT) with three adjustable parameters, named as "active-region-migration model". Active-region-migration model is proposed to describe the catalyst deactivation of RHT where the catalysts are deactivated due to metal loading. Along with the lumped reaction kinetics, the deactivation model can be applied to simulate the hydrogenation reaction performance in RHT. Industrial data from a commercial RHT unit show reasonably good agreements with the model calculations. Essentially, active-region-migration model can separately simulate the catalytic-activity change of each hydrogenation reaction during the whole run of RHT, with a single curve.
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    Design and optimization of multiple interconnected utility systems in an integrated refinery and petrochemical complex
       2020, 22 (4): 126-136.  
    Abstract179)      PDF(pc) (1898KB)(464)       Save
    In an integrated refinery and petrochemical, a centralized utility system (CUS) is generally introduced to integrate the steam demands for all production plants. However, two sub-utility systems (SUSs) locate inside alkene and refinery plants respectively to satisfy the mechanical power demands. Thus, it is difficult to determine the steam production of the CUS because the steam demands of alkene and refinery plants depend on the design and operation of SUSs. To explore the complicated interactions between the CUS and SUSs, we proposed a mixed-integer nonlinear programming (MINLP) model for the synthesis of multiple interconnected utility systems. An extended superstructure was suggested where contains multiple inter-plant connected steam pipe alternatives between the CUS and SUSs and from which the best combination can be identified by the optimization procedure. In SUSs, due to the deficit of steam generated from the process, the CUS needs to supply sufficient steam to the production plants through the final pipes when the plants start. Thus, constraints to select the pipe alternatives were constructed to guarantee that the final pipes can transport enough steam to compensate for the steam deficit. A simple but sufficient accurate model of the multiple extraction steam turbines was proposed to simplify the optimization routine. Then the proposed MINLP framework is applied to a new integrated refinery and petrochemical complex. Two scenarios are investigated in the case study to explore the effect of steam main temperatures on system configurations and operating parameters. In scenario 1 for the fixed main temperatures, the final inter-plant connected pipes between the CUS and SUSs can transport enough steam to compensate for the steam deficit when the alkene and refinery plants start, the TAC of which is $701.17 million. By optimizing the main temperatures, the TAC can be saved $2.7 million. From the results of the two scenarios, the feasibility and effectiveness of the proposed framework for the synthesis of multiple interconnected utility systems have been demonstrated.
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    Techno-Economic Analysis and Life Cycle Assessment for the Typical Intermediate Crude Refining Scheme in China
    周鑫 ZHOU Xin Liu Yibin Xiao-Bo CHEN Yang Chaohe
       2020, 22 (4): 35-45.  
    Abstract176)      PDF(pc) (1920KB)(545)       Save
    The integration of refinery and petrochemical units (IRPUs) has become an inevitable choice with the sustainable development of petrochemical industry. The utilization efficiency of petroleum resources could be improved obviously through such kind of configuration. However, integrating economic and environmental impacts into the model of IRPUs is still a grand challenge. Herein, a TEA-GHG-OPWM (Techno-Economic Analysis and GreenHouse Gases Oriented Plant-Wide Model) model has been established on Aspen HYSYSTM platform to calculate energy consumption, techno-economic performance and GHG emissions for two different kinds of schemes, VRHCRU (Vacuum Residue Hydrocracking) and VRDS-RFCC (Vacuum Residue Desulfurization and Residue Fluid Catalytic Cracking). Furthermore, a novel processing pathway named VGOHDT-HTMP-DC (Vacuum Gas Oil Hydrotreating, Hydrogenation and TMP coupling process and Delayed Coking) has also been developed to find methods to improve economic performance based on ten-million-CNY output value (TMYOV) and reduce GHG emissions. Our results demonstrate that VRHCRU could consume more energy and emit more GHG (877.11 tCO2eq·TMYOV-1·hour-1) than VRDS-RFCC (817.03 tCO2eq·TMYOV-1·hour-1) and VGOHDT-HTMP-DC (721.96 tCO2eq·TMYOV-1·hour-1) while obtaining a higher mass yield of petrochemicals. The VGOHDT-HTMP-DC process exhibits the lowest feedstock consumption, hydrogen consumption, energy consumption and GHG emissions, indicating that VGOHDT-HTMP-DC has both well economic and environment-friendly performance.
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    Carbon Encapsulated Nickel Nanocomposites for the Cathode in Advanced Lithium Sulfur Batteries
    Yang Yuxiang, Xie Jingxin, Wu Genghuang, Zhu Na, Li Huan, Rong Junfeng
    China Petroleum Processing & Petrochemical Technology    2021, 23 (4): 1-6.  
    Abstract168)      PDF(pc) (882KB)(187)       Save
    Lithium sulfur (Li-S) batteries are poised to be the next generation of high-density energy storage devices. In recent years, the concept of “electrocatalysis” has been introduced into the field of Li-S batteries, and some transition metals have been proved to catalyze the electrochemical conversion reaction of sulfur species. In this study, carbon encapsulated nickel nanoparticles (Ni@C) with a specific surface area of 146 m2/g are shown to play a definitive electrocatalytic role for the sulfur cathode. With Ni@C incorporated, the Ni@C/G-S electrode achieved a better electrochemical performance than the G-S electrode. Moreover, the reversible capacity and cycle stability were further improved through chemical modifications of the carbon shell. The influence of doping with different elements on the Li-S battery performance was also investigated in detail. Higher specific capacities of 1229 mAh/g, 927 mAh/g, and 830 mAh/g were achieved at 0.2 C, 0.5 C, and 1.0 C for the N-Ni@C-G/S electrode. Besides, the B-Ni@C-G/S electrode possessed a best cycle stability.
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    Comparison and analysis of toluene adsorption properties of ZSM-5 molecular sieve treated by different modification methods: adsorption kinetic and mechanism studies
    China Petroleum Processing & Petrochemical Technology    2021, 23 (1): 76-87.  
    Abstract163)      PDF(pc) (2234KB)(273)       Save
    MFI molecular sieve with high specific surface area, adjustable pore size and low production cost have been recognized as an effective adsorbent for VOCs removal. In this paper, NaOH solution was used to etch ZSM-5 molecular sieve to increase specific surface area and micro-mesoporous content; GO was loaded on ZSM-5 by ultrasonic-assisted heating immersion method, and large π-bond structure and oxygen-containing functional groups were added to ZSM-5 for improving the composite adsorption performance. In addition, the toluene adsorption performance of two composites were investigated under different factors, it was positively correlated with initial concentration and adsorbent mass, but negatively correlated with temperature. Meanwhile, the result shown the saturated adsorption capacity of OH-ZSM-5 (107.3mg/g) was 1.34 times higher than ZG-15% (80.2mg/g). The pseudo-first-order and pseudo-second-order kinetic model can better describe the adsorption behavior of toluene on OH-ZSM-5 and ZG-15%, respectively. The adsorption mechanism of OH-ZSM-5 was mainly pore-filled adsorption, however, the adsorption mechanisms of ZSM-5@GO composite were pore-filled adsorption, π-π interaction, and H-bond interaction, and the comparison found that the pore-filled adsorption predominates. This study will help to design a new strategy for enhancing the performance of traditional adsorbent ZSM-5 in VOCs removal.
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    Study on the effect of the position of the particle electrode on the electrocatalytic reaction efficiency in three dimensional electrocatalytic system
    China Petroleum Processing & Petrochemical Technology    2021, 23 (3): 30-39.  
    Abstract160)      PDF(pc) (1621KB)(140)       Save
    In order to explore the effect of particle position on the electrocatalytic reaction rate in three-dimensional electrocatalytic reactor,methylene blue was used as the simulated organic wastewater, and spherical graphite particles were used as the electron electrode, COMSOL Multiphysics software were used to simulate potential distribution in three dimensional electrocatalytic reactor. The logarithmic regression model was established with the particle size, potential and position as independent variables and the first-order kinetic constant as dependent variable. Combined with the model, the degradation efficiency of the particle electrodes at different positions in the reactor was predicted, the simulation results show that the reaction efficiency of particle electrode for pollutant degradation is uneven in the three-dimensional electro catalytic oxidation reactor, the increasement of the electric field intensity can change the distribution of electrocatalytic efficiency of particle electrode, the closer the particle electrode is to the anode position, the higher the ability of degradation of pollutants. The difference of electrocatalytic reaction rate between different positions in the particle is large. According to the degree of difference, it can be roughly divided into three regions, and the distribution of electrocatalytic reaction efficiency at different positions in the particle electrode is simulated.
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    Synergistic effect between Zr-MOF and phosphotungstic acid for oxidative desulfurization
    Meng-Ya Zong Yu-Tong ZHAO Cun-Zheng Fan Dan-Hong WANG
       2020, 22 (4): 56-62.  
    Abstract158)      PDF(pc) (919KB)(646)       Save
    PTA/UiO-66 composites were successfully synthesized by the hydrothermal method. The results showed that the synergistic effect between phosphotungstic acid (PTA) and UiO-66 could enhance the oxidative desulfurization (ODS) activity. The XRD results proved that UiO-66 remtained its structure in the PTA/UiO-66 composites. The SEM results showed that the PTA/UiO-66 catalysts exhibited regular octahedral shape. The Raman spectra revealed that PTA in the composites remtained the Keggin structure. The XPS results showed that the electron transfer occurred from Zr-MOF to PTA. The ODS reaction mechanism was discussed. Electrons transfer from Zr-MOF to PTA can promote the generation of active species (?OH) and thus enhance the ODS activity. This explanation can be confirmed by the formation of oxygen vacancy and W0 as revealed by the XPS analysis.
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    Molecular dynamics simulation on the mobility and aggregation of macromolecular lubricant oxidation products and their influences on base stock
    Xia Lei Li Yan Zhang Hongmei Jiang Zhengyi Long Jun
       2020, 22 (3): 101-108.  
    Abstract158)      PDF(pc) (1714KB)(336)       Save
    The mobility and aggregation behavior of macromolecular lubricant oxidation products and their influences on the performance of base stock were probed by molecular dynamics (MD) simulation. The mean squrare displacement (MSD) of molecules was calculated to explore the mobility of molecules. The distribution appearance of lubricant oxidation products in models was acquired to explore the aggregation of molecules. The results show that the mobility of macromolecular oxidation products is lower than that of base stock, and the MSD of macromolecular oxidation products reduces with the increasing macromolecular weight. Macromolecular oxidation products can also decrease the mobility of basic oil. The interaction energy between macromolecules and base stock ascends with the increase of macromolecular weight. Macromolecules with larger molecular weight can affect more basic oil molecules with stronger restriction, which leads to lower mobilities of base stock molecules. There are aggregates formed among macromolecular oxidation products, and the molecules in aggregates are connected by hydrogen bonds. The quantity of hydrogen bonds in aggregates is related to temperature.
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    Effect of acidity on the methylation of benzene with methanol catalyzed by HZSM-5: A DFT study
    Wei Pifeng Fu Guangbin Mu Shanliang Gao Jichao Wen Zhenhao Zhu Xuedong
    China Petroleum Processing & Petrochemical Technology    2021, 23 (2): 21-27.  
    Abstract158)      PDF(pc) (1789KB)(159)       Save
    Different acidic HZSM-5 were constructed by doping with Al, Ga, or In. The effect of acidity on the adsorption of methylbenzenes and the reaction energy barriers for the methylation of benzene with methanol catalyzed by HZSM-5 were investigated by using density functional theory. The results show that acidity exhibits less effect in the adsorption of methylbenzenes, while linear relationships are observed between the acidity and reaction energy barriers. As the acidity increases, the reaction energy barrier decreases linearly, and stepwise pathway becomes dominant in strong acidity environment while weak acidity is conducive to the concerted pathway. The calculation results could contribute to understanding the relationship between acidity and the zeolite-catalyzed alkylation reaction of methylbenzenes.
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    Fabrication of Fe Nanoparticles into N-doped Mesoporous Carbon Nanotube Derived from rice-like Fe/N-MOF and its ORR catalytic performance for MFC
    Lu Decheng Wang Wenyi Chang Jiacheng Wang Xueqin Wang Yuanyuan Song Hua
    China Petroleum Processing & Petrochemical Technology    2021, 23 (2): 98-108.  
    Abstract156)      PDF(pc) (2540KB)(136)       Save
    The development of non-noble metal oxygen reduction catalysts (ORR) to improve microbial fuel cell (MFC) performance remains extremely challenging. Herein, nitrogen-doped iron-based porous carbon nanotube Fe/N-MC-T ORR catalysts were derived from Fe/N-MOF by pyrolyzation using acetonitrile as the nitrogen precursor in a low-cost organic solvent. The Fe/N-MC-T catalysts with different pyrolysis temperatures (T) were characterized by SEM, TEM, BET, XRD and XPS. Fe/N-MOF showed a smooth rice-like structure with a particle size of about 400×50 nm. The Fe species in Fe/N-MC-T mainly exists in the form of zero-valent iron with small amount of Fe3C. The electrochemical tests reveal that the onset and half-wave potentials of Fe/N-MC-T were 0.89 V and 0.80 V respectively, which are slightly lower than those of the commercial Pt/C (0.92 V and 0.82 V), indicating that Fe/N-MC-700 had the high electrocatalytic activity for ORR. The MFC with Fe/N@MC-700 showed the highest power density of 864.1 mW?m-2, which was about 2.25 times as compared to that of MFC with carbon cloth, and slightly lower than that of MFC with Pt/C (20 wt%) (1002.0 mW?m-2), demonstrating the Fe particles wrapped in carbon nanotubes are highly active to ORR.
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    Heat Exchanger Network Retrofit for Optimization of Crude Distillation Unit Using Pinch Analysis
    Sun Mengying, Fu Dianliang, Sun Lanyi
    China Petroleum Processing & Petrochemical Technology    2021, 23 (1): 31-40.  
    Abstract154)      PDF(pc) (1784KB)(296)       Save
    Crude distillation unit (CDU) is regarded as the main energy consumer in the entire refinery process. In this paper, the process simulation software and the energy management software are used to simulate the flowsheet and analyze the energy consumption, respectively. Stream data obtained from an existing CDU are applicable in the pinch analysis. To reduce the amount of cross-pinch heat transfer, three approaches of resequencing, repiping, and adding heat exchangers are adopted. Compared with the existing CDU, the results demonstrate that the inlet temperature of the furnace can be increased by 25.4 ℃, the amount of hot and cold utilities can be reduced by 15.1% and 19.6%, respectively. The economic evaluation indicates that the operating cost is saved by 8×106 $/a, and the payback period is about 9 months.
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    Oil phase molecular compositions of oily sludge using mass spectrometry
       2020, 22 (4): 21-25.  
    Abstract154)      PDF(pc) (647KB)(538)       Save
    As the hazardous wastes, recycling the high petroleum hydrocarbon content of oily sludge contributes to clean environment. In this study, Oily sludge was subjected to ultrasonic extraction sequentially with acetone/carbon disulfide mixture solvent. Fourier transform infrared spectroscopy (FTIRS), Gas chromatography/mass spectrometry (GC/MS) and Quadrupole exactive orbitrap mass spectrometry (QPEOTMS) were used to analyze oil phase compounds of oily sludge. The n-alkanes detected in oil phase ranging from C8 to C31. Compared with analysis results of GC/MS, more heteroatom-containing compounds of oil phase such as O3, O4, N2Oo and N3Oo (o=0-3) could be detected in the analysis of QPEOTMS. Overall, these findings will potentially contributed to the clean and efficient utilization of oliy sludge wastes.
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