Effect of impurities on desulfurization properties of limestone during coal gasification
Effect of impurities on desulfurization properties of limestone during coal gasification *出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)
年 卷 期：1998年第10卷第4期
页 面：102-107页
核心收录：
学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术]
主 题：coal gasification in bed desulfurization calcium based sorbent additive.
摘 要：In order to understand the function of calcium based sorbents on desulfurization during coal gasification and the effect of impurities on it, a series of tests using three different limestones and four kinds of different sodium salts and four kinds different chlorides were conducted by X ray diffraction and X ray photoelectron spectroscopy techniques. The structure of precursory compounds and pretreatment materials were examined by XRD. The binding energy and relative contents of sulfur, calcium and carbon, which exist in different forms in the residues after coal gasification, were measured by means of XPS. The existing forms of sulfur and calcium vary with impurities in limestone. Sodium or chloride play a promotive role on limestone desulfurization, but this promotion is affected by the chemical environment.
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