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Wang X.,CAS Institute of Engineering Thermophysics | Zhao L.,Chinese Academy of Sciences | Gao J.,Chinese Urban Construction Design and Research Institute
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | Year: 2013

A fixed bed reactor modle with K/MoS2 as catalyst was set up to predict the performance of mixed alcohol synthesis. The mass and energy conversion of mixed alcohol and power cogeneration system based on black liquor gasification was simulated and analyzed. The corresponding recirculation ratios were determined, at which points the synthesis tail gas is capable of being used as fuel of gas turbine under the condition of different CO2 contents at reactor inlet. The influence of CO2 content on the performance of synthesis reactor, power generation, utilities consumption and total energy utilization efficiency was studied. Results show that the recirculation ratio increases with the decline of reactant CO2 content. Evaluated by total energy utilization efficiency and utilities consumption, the suitable value of reactant CO2 content is 1%. © 2013 Chinese Society for Electrical Engineering. Source

Wang X.,CAS Institute of Engineering Thermophysics | Wang X.,Chinese Academy of Sciences | Gao J.,Chinese Urban Construction Design and Research Institute | Sun Z.-L.,CAS Institute of Engineering Thermophysics | Sun Z.-L.,Chinese Academy of Sciences
Zhongguo Zaozhi Xuebao/Transactions of China Pulp and Paper | Year: 2012

The objective of the paper is to optimize the operation conditions of higher alcohol synthesis via raw syngas from high temperature gasification of black liquor. The process of CO2 removal from syngas is simulated by commercial software Aspen plus. The variations of H2S content, absorbent consumption and heat load for absorbent regeneration with CO2 content in clean singes (reactant) are analyzed. The synthesis process is analyzed based on the model of a fixed bed reactor and K/MoS2 catalyst. Products distributions and yields are predicted. The influence of operation conditions, including CO2 content in reactant, catalyst loading, reaction temperature and pressure on CO conversion ratio, selectivities of alcohol, hydrocarbon, CO2 and ester, mass content of C2+ alcohol and space time yield are studied by sensitive studies. Analysis results show that the optimum operation conditions of the reactor are: temperature 310~330°C, pressure 9~11 MPa, catalyst loading ratio 20~30 g·h/mol and CO2 content 1.6%. Source

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