CO2 utilization for gasification of carbonaceous feedstocks: A thermodynamic analysis

被引：110

作者：

Renganathan, T. ^{[1
]}

Yadav, M. V. ^{[1
]}

Pushpavanam, S. ^{[1
]}

Voolapalli, R. K. ^{[2
]}

Cho, Y. S. ^{[3
]}

机构：

[1] Indian Inst Technol, Dept Chem Engn, Madras 600036, Tamil Nadu, India

[2] Bharat Petr Corp Ltd, Corp R&D Ctr, Greater Noida 201306, India

[3] Korea Inst Sci & Technol, Div Energy, Seoul 130650, South Korea

来源：

CHEMICAL ENGINEERING SCIENCE | 2012年 / 83卷

关键词：

Pollution; Energy; Simulation; Thermodynamics process; Gasification; Carbon dioxide reuse;

D O I：

10.1016/j.ces.2012.04.024

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A thermodynamic analysis of gasification of carbonaceous feedstocks using carbon dioxide and a mixture of carbon dioxide with steam or oxygen is carried out using Gibbs minimization approach. Simulations are carried out to study the effect of different operating conditions on the gasifier performance using Aspen Plus. Gasification using CO2 at ambient conditions is not favorable under adiabatic condition. Complete carbon conversion can be obtained by increasing the operating temperature or flowrate of carbon dioxide. A cold gas efficiency greater than 1 is obtained under certain operating conditions. Maximum carbon dioxide conversion is obtained at the carbon boundary point. Based on the minimum energy requirement for complete carbon conversion, a universal optimal operating temperature of 850 degrees C has been identified for gasification of any feedstock. Biomass requires less heat input compared to coal. Use of steam or oxygen as a cogasifying agent reduces the carbon dioxide and energy requirement but reduces carbon dioxide conversion. Syngas with a wide ranging ratio of hydrogen/carbon monoxide can be obtained using carbon dioxide gasification. Trends of simulation predictions are qualitatively consistent with experimental observations. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：159 / 170

页数：12

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