Thermodynamic analyses of a biomass-coal co-gasification power generation system

Linbo Yan; Guangxi Yue; Boshu He

doi:10.1016/j.biortech.2016.01.049

Thermodynamic analyses of a biomass-coal co-gasification power generation system

Bioresour Technol. 2016 Apr:205:133-41. doi: 10.1016/j.biortech.2016.01.049. Epub 2016 Jan 23.

Authors

Linbo Yan¹, Guangxi Yue¹, Boshu He²

Affiliations

¹ Department of Thermal Engineering, Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Tsinghua University, Beijing 100084, China.
² Institute of Combustion and Thermal Systems, School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China; Beijing Key Laboratory of Powertrain for New Energy Vehicle, Beijing Jiaotong University, Beijing 100044, China. Electronic address: hebs@bjtu.edu.cn.

PMID: 26826573
DOI: 10.1016/j.biortech.2016.01.049

Abstract

A novel chemical looping power generation system is presented based on the biomass-coal co-gasification with steam. The effects of different key operation parameters including biomass mass fraction (Rb), steam to carbon mole ratio (Rsc), gasification temperature (Tg) and iron to fuel mole ratio (Rif) on the system performances like energy efficiency (ηe), total energy efficiency (ηte), exergy efficiency (ηex), total exergy efficiency (ηtex) and carbon capture rate (ηcc) are analyzed. A benchmark condition is set, under which ηte, ηtex and ηcc are found to be 39.9%, 37.6% and 96.0%, respectively. Furthermore, detailed energy Sankey diagram and exergy Grassmann diagram are drawn for the entire system operating under the benchmark condition. The energy and exergy efficiencies of the units composing the system are also predicted.

Keywords: Biomass; Chemical looping; Co-gasification; Coal; Solid oxide fuel cell (SOFC).

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Biomass
Carbon
Coal*
Energy-Generating Resources*
Iron
Steam
Temperature
Thermodynamics*

Substances

Coal
Steam
Carbon
Iron