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A separate-type autothermal CH_(4) dry reforming system with exergy recuperation

Carbon Resources Conversion 2022年第4期5卷 310-319页

作者： Zhongkai Zhao yohanes andre situmorang Ping An Jingxuan Yang Xiaogang Hao Jenny Rizkiana Abuliti Abudula Guoqing Guan School of Chemistry and Chemical Engineering Taiyuan University of TechnologyTaiyuan 030024China Graduate School of Science and Technology Hirosaki University1-BunkyochoHirosaki 036-8560Japan Equipment Department Chengda Engineering Corporation of ChinaChengdu 610041China Energy Conversion Engineering Laboratory Institute of Regional Innovation(IRI)Hirosaki University3-BunkyochoHirosaki 036-856Japan Department of Chemical Engineering Institut Teknologi BandungGanesha 10Bandung 40132Indonesia Key Laboratory of Resources Chemicals and Materials(Shenyang University of Chemical Technology) Ministry of EducationShenyang 110142China

Currently,CO_(2) conversion and utilization have become a key to mitigate the global *** this study,a novel separate-type autothermal dry reforming of methane(S-ATDRM)system is proposed and simulated,in which the methane dry reforming combined with methane partial oxidation is performed in a circulating fluidized bed with exergy recuperation to eliminate the negative effect of the products of CH_(4) partial oxidation on the DRM reaction and further improve the CO_(2) conversion *** results demonstrate that this S-ATDRM system can achieve an exergy efficiency of 84.7%,and about 1055.7 kW of exergy can be recuperated from the process for crude syngas cooling and reapplied for pre-heating of feedstocks of CO_(2),O2 and CH_(4).It is found that the largest exergy destruction in this system occurs in the partial oxidation reactor,which occupies ca.45.6%of the whole exergy *** with the conventional ATDRM system,although the exergy of S-ATDRM system is decreased by approximately 0.3%,the CO_(2) conversion is substantially increased by about 11.3%.

关键词： Carbon dioxide Autothermal dry reforming Circulating fluidized bed Exergy efficiency Exergy recuperation

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Energy-saving strategy for a transport bed flash calcination process applied to magnesite

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Carbon Resources Conversion 2021年第1期4卷 122-131页

作者： Ping An Zhennan Han Kangjun Wang Jiguang Cheng Zhongkai Zhao yohanes andre situmorang Jenny Rizkiana Abuliti Abudula Guoqing Guan Education Ministry Key Laboratory of Resources Chemicals and Materials Shenyang University of Chemical TechnologyShenyangChina Graduate School of Science and Technology Hirosaki UniversityHirosaki1-BunkyochoJapan Laboratory of Energy Conversion Engineering Institute of Regional Innovation(IRI)Hirosaki University2-1-3 MatsubaraAomoriJapan Department of Chemical Engineering Institut Teknologi BandungGanesha 10Bandung 40132Indonesia

A transport bed flash calcination(TBFC)process applied to magnesite is systematically investigated through process simulation to optimize the energy-saving *** high-temperature calciner flue gas is used to preheat the fed magnesite,while the sensible heat with the caustic calcined magnesia(CCM)product is cooled by air sent to the ***-decomposition of magnesite during preheating is considered on basis of the kinetics measured using a micro fluidized bed reaction analyzer that allows the minimized effect of external diffusion on *** staged fuel gas supply the TBFC process allows the equivalence ratios around 1.2 for *** preferred arrangement of stages for magnesite preheating and CCM cooling are respectively 4 and 2,leading to the energy consumption of 4100 kJ/kg-CCM and the energy efficiency of 66.8%,which is almost doubly higher than the 33.9%of the conventional reverberatory furnaces(RF).The pre-decomposition occurs mainly in the 1st-stage preheater,and the maximal conversion is about 13%.Varying the stages of preheating appears more influential on the energy saving than varying the cooling stages,while residence time above 1 s in the preheaters has limited effect.

关键词： Energy efficiency Transport bed Calcination Heat recovery Process simulation

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