摘要
以三类不同氨基(二乙烯三胺、三亚乙基四胺、四乙烯五胺)化合物作为改性剂分别对茶壳活性炭(AC)载体进行氨基化改性,获得吸附剂NAC-1、NAC-2、NAC-3,并将其应用于草甘膦水解尾气的脱酸工艺中。通过考察吸附剂种类、吸附剂用量、吸附温度等因素对水洗后残余HCl(500 ppm)与CO_(2)(0.08%)的二次吸附效果的影响,确定了最佳的脱酸条件:吸附剂NAC-1用量为15 g,吸附温度为40℃,吸附时间约为1000 s。经由吸收-吸附串联工艺,一氯甲烷纯度由净化前的64.87%提升到了99.97%,且有效避免了传统碱洗工艺带来的废液问题。
Using tea shell activated carbon(AC)as adsorbent carrier,three different kinds of amino compounds(including diethylenetriamine,triethylenetetramine and tetraethylenepentamine)as modifier,then amino modification of the carrier(referred to as NAC-1,NAC-2,NAC-3)is applied to the purification of tail gas from glyphosate hydrolysis.The influence of adsorbent types,adsorbent dosage and adsorption temperature on the secondary adsorption removal of residual HCl(500 ppm)and CO_(2)(0.08%)after washing by water are discussed and the optimum deacidification conditions are also established.Under the operating conditions with the NAC-1 dosage of 15 g,the temperature of 40℃,the adsorption time of 1000 s,the purity of chloromethane is significantly increased from 64.87%to 99.97%via the absorption-adsorption process.At the same time,the approach also avoids the waste liquid discharge problem caused by the traditional alkali washing procedure.
作者
韩晓丹
付建平
胡居吾
王慧宾
HAN Xiaodan;FU Jianping;HU Juwu;WANG Huibin(Department of Applied Chemistry,Jiangxi Academic of Sciences,Nanchang 330096,China)
出处
《生物化工》
2023年第2期128-132,共5页
Biological Chemical Engineering
基金
江西省重点研发计划(20192BBG70060,20181BBG70041,20202BBGL73083)
江西省科学院包干制项目(2021YSBG22020)。
关键词
草甘膦水解尾气
一氯甲烷
氮掺杂
吸附
净化
tail gas from glyphosate hydrolysis
chloromethane
N-doped carbon materials
adsorption
purification
