多元金属脱氯剂的脱氯性能

A Multi-metal Adsorbent for Chlorine Removal

采用气固相固定床反应器研究了一种多元金属脱氯剂的脱氯行为及耐水性能,考察了温度及水汽环境对脱氯剂反应性及强度的影响,通过TG及XRD分析初步探讨了在脱氯反应过程中脱氯剂活性相的变化情况。结果表明:多元金属复配的脱氯剂脱氯净化度高,500℃时的穿透氯容为45.3%;多元金属氧化物的引入增加了脱氯剂的耐水性能和机械强度,脱氯前浸水前后的机械强度分别达114.4 N/cm和66.3 N/cm。

Experimental runs were performed to study the effectiveness of a new multi-metal adsorbent in removing HCl from the feed stream in a solid-gas fixed bed reactor as well as the impacts of temperature and water in the feed on the adsorbent＇s reactivity and mechanical strength. The adsorbent achieved maximum chlorine content of 45.3% at the breakthrough （effluent ρHCl = 1 mg/L） when the removal was performed at 500 ℃ ; the adsorbent exhibited a maximum capacity HC1 of 51.2% also at 500 ℃. According to the TG and XRD data for the new metal adsorbent, the declining HCl capacity was the result of Ca（OH）2 decomposition that would take place at 〉500 ℃. The addition of metal oxides improved the adsorbentrs tolerance to water and its mechanical strength. The mechanical strength of the fresh metal adsorbent before and after contacting with water was 114.4 N/cm and 66.3 N/cm, respectively.