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Exergy Analysis and Retrofitting of Natural Gas-based Acetylene Process

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Chinese Journal of Chemical Engineering 2008年第5期16卷 812-818页

作者：王志方郑丹星 School of Chemical Engineering Beijing University of Chemical Technology Beijing 100029 China

This article presents an acetylene production process by partial oxidation/combustion of natural gas. The thermodynamic performance and exergy analysis in the process are investigated using the flow-sheeting program Aspen Plus. The results indicate that the most important destruction of exergy is found to occur in the reactor and water quenching scrubber, amounting to 8.23% and 10.39%, respectively, of the entire system. Based on the results of thermodynamic and exergy analysis, the acetylene reactor has been retrofitted. The improvement ratios of molar 02 to CH4 and molar CO to CN4 are 0.65 and 0.20, respectively. An improvement of the acetylene production system is proposed. Adopting the improvement operation conditions and using oil to realize the reaction heat recovery, the feedstock of natural gas is reduced by 9.88% and the exergy loss in the retrofitting process is decreased by 19.71% compared to the original process.

关键词： acetylene exergy analysis natural gas partial oxidation hydrogen

Soot formation and oxidation during bio-oil gasification:experiments and modeling

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Journal of Energy Chemistry 2013年第5期22卷 701-709页

作者： Younes Chhiti Marine Peyrot Sylvain Salvador LEGI UJF-Grenoble 1/Grenoble-INP/CNRSBP 53Grenoble F-38041 France CEA/DRT/LITEN/DTBH/LTB Laboratoire des Technologies pour la Biomasse 17 rue de Martyrs 38054Grenoble France Ecole des Mines d'Albi-Carmaux Centre RAPSODEE FRE CNRS 3213 Campus Jarlardroute de Teillet 81013Albi France

A model is proposed to describe soot formation and oxidation during bio-oil *** is based on the description of bio-oil heating,devolatilization,reforming of gases and conversion of both char and soot *** chemistry (159 species and 773 reactions) is used in the gas *** production is described by a single reaction based on C2H2species concentration and three heterogeneous soot oxidation *** support the validation of the model,three sets of experiments were carried out in a lab-scale Entrained Flow Reactor (EFR) equipped with soot quantification *** temperature was varied from 1000 to 1400 C and three gaseous atmospheres were considered:default of steam,large excess of steam(H2O/C=8),and the presence of oxygen in the O/C range of 0.075–*** model is shown to accurately describe the evolution of the concentration of the main gas species and to satisfactorily describe the soot concentration under the three atmospheres using a single set of identified kinetic *** to this model the contribution of different mechanisms involved in soot formation and oxidation in various situations can be assessed.

关键词： soot gasification pyrolysis partial oxidation bio-oil

[Cu(2,2'-bpy)Cl_2]和[Cu(1,10-phen)Cl_2]在多金属氧酸盐上的多相化:选择性氧化四氢化萘的新催化剂(英文)

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催化学报 2011年第5期32卷 807-811页

作者： M. BOLTZ A. BLANC G. LAUGEL P.PALE B. LOUIS Laboratoire de Synthkse et Reactivite Organiques Institut de Chimie UMR 7177 CNRS Universitd de Strasbourg 4 rue Blaise Pascal 67000 Strasbourg Cedex France

Mononuclear Cu(II)bipyridine(1)and phenantroline complexes(2)were synthesized and immobilized by different procedures on H3PW12O40 polyoxometalate(POM).Characterization by XRD and SEM-EDX were performed to assess the preservation of the Keggin structure and stoichiometry of the *** immobilized complexes were tested as heterogeneous catalysts for the partial oxidation of tetralin(1,2,3,4-tetrahydronaphthalene)using hydrogen peroxide as oxidant in acetonitrile/water as solvent.[Cu(2,2'-bpy)Cl][H2PW12O40] and[Cu(1,10-phen)Cl][H2PW12O40]oxidized tetralin at room temperature,with 16%conversion with(2),to 1-tetralone and 2-tetralone with 83%***,the selectivity for 1-tetralone was only 56%.Different preparation methods for the heterogenization of these complexes on the POM Keggin unit were compared and used to enhance the selectivity to 1-tetralone to 75%.

关键词： tetralin partial oxidation Cu(II)complexes 2,2’-bipyridine 1,10-phenantroline hydrogen peroxide polyoxometalate

Methane oxidation to Synthesis Gas Using Lattice Oxygen of La_(1-x)Sr_xMO_(3-λ)(M =Fe,Mn) Perovskite Oxides Instead of Molecular Oxygen

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Petroleum Science 2005年第1期2卷 19-23页

作者： LiRanjia YuChangchun ZhuGuangrong ShenShikong KeyLaboratoryofCatalysisofCNPC UniversityofPetroleumBeijing102249China

In this paper, the partial oxidation of methane to synthesis gas using lattice oxygen of La1- SrxMO3-λ (M=Fe, x ... 详细信息

In this paper, the partial oxidation of methane to synthesis gas using lattice oxygen of La1- SrxMO3-λ (M=Fe, x Mn) perovskite oxides instead of molecular oxygen was investigated. The redox circulation between 11% O2/Ar flow and 11% CH4/He flow at 900℃ shows that methane can be oxidized to CO and H2 with a selectivity of over 90.7% using the lattice oxygen of La1- SrxFeO3-λ (x≤0.2) perovskite oxides in an appropriate reaction condition, while the lost lattice x oxygen can be supplemented by air re-oxidation. It is viable for the lattice oxygen of La1- SrxFeO3-λ (x≤0.2) perovskite x oxides instead of molecular oxygen to react with methane to synthesis gas in the redox mode.

关键词： partial oxidation methane synthesis gas lattice oxygen La1- xSrxFeO3-λperovskite oxides