高温煤气氨、有机硫、焦油、氯化氢、碱金属的脱除

Study on Removal of HCl, NH_3, Organic Sulphur, Tar Component and Alkali Metal Vapor in High Temperature Coal Gas

在固定床反应器中首先对高温煤气中氨、有机硫化物、氯化氢及焦油 4种污染物进行了同时脱除 ,其中选择CS2 和 1-甲基萘分别作为高温煤气中有机硫化物和焦油蒸气的模型化合物。研究得出 ,ECl脱氯剂和氧化态Ni- 3催化剂分别对HCl和 1-甲基萘的转化率为 10 0 % ,氧化态的Ni- 3催化剂对氨的转化率和硫化态的Ni- 3催化剂对CS2 的转化率则随温度的升高而增加 ,在 30 0～ 550℃之间 ,氨的最大转化率为 79% ,CS2 的最大转化率为 88% ,得出对高温煤气中氨、有机硫化物、氯化氢及焦油蒸气在相同条件下同时脱除是可行的。在氯化氢和碱金属蒸气两种污染物同时脱除的研究中选择NaCl作为碱金属的模型化合物 ,分别选择特级矾土、高铝土和活性氧化铝为碱金属蒸气脱除剂 ,ECl脱氯剂为HCl气体的脱除剂研究得出 ,高铝土脱除碱金属的效率高达 79.5% ,在碱金属脱除剂和ECl脱氯剂条件下HCl气体的脱除率为 10 0 %

The experiments were designed to remove HCl, NH 3, organic sulphur and coal tar component in high temperature coal gas, in combination and simultaneously by using a fixed-bed reactor at the reaction temperature range from 300 ℃ to 550 ℃. 1- methylnaphthalene was used as a tar model compound, and CS 2 was used as organic sulphur model compound. The tests show that the maximum removal efficiency is 100 %, 100 %, 79 %, 88 % for HCl, 1- methylnaphthalene, NH 3, and CS 2, respectively. Three sorbents of alkali metal and ECl were used to simultaneously remove alkali metal and HCl vapor. It is found that the removal of alkali metal vapor with activated Al 2O 3 is a physical adsorption process.