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Removal of hydrogen chloride gas using honeycomb-supported natural soda ash
Chemical Engineering Research and Design ( IF 3.9 ) Pub Date : 2020-01-18 , DOI: 10.1016/j.cherd.2020.01.012
Naoto Tsubouchi , Natsumi Matsuoka , Ken Fukuyama , Yuuki Mochizuki

In this study, the HCl absorption performance of cheap natural soda ash loaded on a honeycomb support as a hot gas cleanup method was investigated by using flow-type fixed-bed reactor. The honeycomb-supported soda ash improved the HCl absorption extent significantly at the 1-ppm breakthrough time compared to the result without the support; thus, the use of the support was justified. The HCl removal performance of the honeycomb-supported soda ash depended significantly on temperature (300–600 °C). Under the present conditions, the absorption extent at 1-ppm breakthrough time was maximized at 500 °C. This absorption extent increased as the HCl concentration in the supplied gas decreased, and it was assumed that this absorbent was suited to actual coal gasification processes. No change in the HCl absorption extent (60–65 %) was observed for Na2CO3 loading between 33 and 65 mass%. The natural soda ash (Na2CO3) loaded on a honeycomb support changed to NaCl after HCl absorption examination. Regenerated HCl absorbent from spent honeycomb showed similar HCl absorption performance with fresh absorbent at 300–500 °C.



中文翻译:

用蜂窝状纯碱去除氯化氢气体

在这项研究中,通过使用流动型固定床反应器,研究了廉价廉价纯碱在蜂窝状载体上作为热气净化方法的HCl吸收性能。与没有载体的结果相比,蜂窝载体的纯碱在1 ppm的穿透时间显着提高了HCl的吸收程度。因此,使用支持是合理的。蜂窝状纯碱的HCl去除性能在很大程度上取决于温度(300–600°C)。在目前的条件下,在500 ppm时,穿透时间为1 ppm时的吸收程度最大。随着吸收气体中HCl浓度的降低,吸收程度增加,并且认为该吸收剂适合于实际的煤气化过程。Na的HCl吸收程度(60–65%)没有变化2 CO 3负载量为33至65质量%。经过HCl吸收检查后,装载在蜂窝状载体上的天然纯碱(Na 2 CO 3)变为NaCl。废蜂窝中再生的HCl吸收剂在300–500°C的温度下具有与新鲜吸收剂相似的HCl吸收性能。

更新日期:2020-01-18
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