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首页> 外文期刊>Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers >Research progress of hot gas filtration, desulphurization and HGl removal in coal-derived fuel gas: A review
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Research progress of hot gas filtration, desulphurization and HGl removal in coal-derived fuel gas: A review

机译：热气体过滤的研究进展,脱硫和煤成HGl删除燃气:审查

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摘要

The present review paper highlighted on the recent progress of hot gas filtration, desulphurization and HCl removal in coal-derived fuel gas for combined cycle power generation (IGCC) or molten carbonate fuel cells (MCFC) technologies. As a critical process in the gasification system, hot gas filtration in the particulate control device (PCD) was introduced with enhanced understanding of equipment and operation, filter element and failsafe material properties, and gasification ash characteristics. The issues associated with the commercialization of hot gas filtration were also addressed, and some novel systems and methods were also discussed. The hot gas desulphurization in coal-derived fuel gas has concentrated on developing regenerable sorbents including the single and composite oxides of Zn, Fe, Cu, Mn and other species, and the reduction of metal oxides in the highly reducing atmosphere followed by vaporization of elements can be a problem for reactivity and regeneration. With regard to the removal of HCl, the studies have indicated sorbents prepared by pelletizing the powders of naturally available alkali metal and alkali earth metal substances can rapidly react with HCl vapor and reduce the HCl vapor concentration to less than 1 ppmv, and some sorbents lab-made have very high chlorine capacity. The sorbents based hot gas cleaning also has some challenges. Kinetics studies showed that unreacted shrinking core (USC) can be applied to the modeling of H2S and HCl removal by sorbents at high temperature, and the surface chemical reaction and reactant diffusion by product layers between solid sorbents and gases were very important mechanisms. The paper also proposed and discussed a rational concept for the simultaneous removal of multiple contaminants including ash, H2S and HCl, which will offer a possible cost reduction by two or more processes in a single vessel for hot gas cleaning.
机译：目前的审查论文强调了最近进步的热气体过滤、脱硫和盐酸清除煤成燃料气体联合循环发电(IGCC)或熔化碳酸盐燃料电池(MCFC)技术。气化系统中的关键流程,热气体过滤的颗粒控制装置(PCD)介绍了增强理解的设备和操作,过滤元素和失效保护材料特性和气化灰的特点。热气体过滤的商业化还指出,一些系统和小说方法进行了讨论。脱硫在煤成燃料气体集中在发展中可以再生吸附剂包括锌、单一和复合氧化物铁、铜、锰和其他物种,和减少金属氧化物的高还原性气氛蒸发的元素可以是紧随其后问题反应和再生。HCl的去除方面,研究表示准备的吸着剂球团可用的自然粉碱金属和碱土金属物质能迅速反应与盐酸蒸气和减少盐酸蒸气浓度小于1 ppmv,一些实验室有很高的吸着剂氯能力。也有一些挑战。,未反应的核心(USC)可以减少适用于除硫化氢和HCl的建模吸着剂在高温下,表面化学反应,反应物扩散固体吸附和气体之间的产品层非常重要的机制。提出并讨论了一个理性的概念同时去除多种污染物包括灰、硫化氢和HCl将提供由两个或两个以上的流程可能降低成本在一个容器的热气体清洗。

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