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Energy and Environment, 1995

ISBN:
1-56700-052-5 (Print)

DRY SO2 REMOVAL AT LOW TEMPERATURE USING CALCIUM-BASED SORBENTS

Xiang Gao
Departmental of Energy Engineering Zhejiang University

XuanTian Li
Zhejiang University, China

Zhongyang Luo
State Key Laboratory of Clean Energy Utilization, Institute of Thermal Power Engineering, Zhejiang University, Hangzhou 310027

JinSong Zhou
Departmental of Energy Engineering Zhejiang University

YaFei Chen
Zhejiang University, China

Mingjiang Ni
State Key Laboratory of Clean Energy Utilization, Institute of Thermal Power Engineering, Zhejiang University, Hangzhou 310027

Kefa Cen
State Key Laboratory of Clean Energy Utilization, Institute of Thermal Power Engineering, Zhejiang University, Hangzhou 310027

Abstract

The reaction between S02 and two dry calcium-based sorbents, calcium oxide (CaO) and calcium hydroxide (Ca(OH)2), has been studied on a laboratory-scale electrically heated fluidized bed reactor at temperature below 673 K. Experimental data on CaO and Ca(OH)2 are presented in this paper. Two calcium-based sorbents have similar reactivity curve but different sulfation rate. The results show the sulfation reactivity depends on particle size, reaction temperature and sorbent/inert ratio. From the SEM micro graphs, the external surface microstructure of calcium oxide has been obtained before and after sulfation.