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Frontiers of Chemical Science and Engineering

ISSN 2095-0179

ISSN 2095-0187(Online)

CN 11-5981/TQ

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Front Chem Eng Chin    2010, Vol. 4 Issue (4) : 491-497    https://doi.org/10.1007/s11705-010-0511-z
RESEARCH ARTICLE
Sensitivity analysis of a methanol and power polygeneration system fueled with coke oven gas and coal gas
Guoqiang ZHANG1,2, Lin GAO1, Hongguang JIN1(), Rumou LIN1, Sheng LI1,2
1. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China; 2. Graduate School, Chinese Academy of Sciences, Beijing 100190, China
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Abstract

The sensitivity analysis of a polygeneration energy system fueled with duo fuel of coke oven gas and coal gas is performed in the study, and the focus is put on the relations among syngas composition, conversation rate and performance. The impacts of the system configuration together with the fuel composition on the performance are investigated and discussed from the point of cascading utilization of fuel chemical energy. First, the main parameters affecting the performance are derived along with the analysis of the system configuration and the syngas composition. After the performance is being simulated by means of the Aspen Plus process simulator of version 11.1, the variation of the performance due to the composition of syngas and the conversion rate of chemical subsystem is obtained and discussed. It is obtained from the result that the proper conversion rate of the chemical subsystem according to the specific syngas composition results in better performance. And the syngas composition affects the optimal conversion rate of the chemical subsystem, the optimal point of which is around the stoichiometric composition for methanol production (CO/H2 = 0.5). In all, the polygeneration system fueled with coke oven gas and coal gas, which can realize the reasonable conversion of syngas to power and chemical product according to the syngas composition, is a promising method for coal energy conversion and utilization.
Keywords duo fuel of coke oven gas and coal gas      polygeneration of power and methanol      sensitivity analysis      the relation among energy utilization      syngas composition and chemical conversion rate     
Corresponding Author(s): JIN Hongguang,Email:hgjin@mail.etp.ac.cn   
Issue Date: 05 December 2010
 Cite this article:   
Guoqiang ZHANG,Lin GAO,Hongguang JIN, et al. Sensitivity analysis of a methanol and power polygeneration system fueled with coke oven gas and coal gas[J]. Front Chem Eng Chin, 2010, 4(4): 491-497.
 URL:  
https://academic.hep.com.cn/fcse/EN/10.1007/s11705-010-0511-z
https://academic.hep.com.cn/fcse/EN/Y2010/V4/I4/491
Fig.1  Flow diagrams of individual processes. (a) IGCC system; (b) methanol production (MP)
Fig.2  Flow diagram of the polygeneration system fuel with coke oven gas and coal gas
base coal analysis /wt-%
Cf68.54Hf3.97
Of6.85Nf0.74
Sf1.08ashf9.98
Wf8.84
assumption for gas turbine
parameterassumption
turbine inlet temperature /°C1200
pressure ratio16
mechanical efficiency /%99
isentropic efficiency, Turbine /%89
isentropic efficiency, compressor /%85
assumption for steam cycle
turbine inlet temperature /°C535
turbine inlet pressure /bar120
mechanical efficiency /%98
isentropic efficiency of steam turbinehigh/middle/low pressure /%85/85/87
pinch temperature difference /°C30
Tab.1  Basic assumptions
Fig.3  Performance variation of the polygeneration system due to the syngas composition and conversion rate of the chemical subsystem
Fig.4  Variation of optimal conversion rate and product ratio of chemical to power due to the mole ratio of CO to H
Fig.5  Impact of methane reforming on the performance of the polygeneration system
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