活性炭改性对催化剂脱砷性能的影响  

Effect of activated carbon modification on the catalyst for adsorption removal of arsenic

作　　者：冯琪 姜增琨[1] 李阳[2] 鞠雅娜[1] 赵秦峰[1] 李天舒 钟海军[1] 葛少辉[1] FENG Qi;JIANG Zengkun;LI Yang;JU Ya’na;ZHAO Qinfeng;LI Tianshu;ZHONG Haijun;GE Shaohui(Petrochemical Research Institute,CNPC,Beijing 102209,China;Key Laboratory of Clean Fuel,CNPC,Beijing 102209,China)

机构地区：[1]中国石油天然气股份有限公司石油化工研究院,北京102209 [2]中国石油天然气集团公司清洁燃料重点实验室,北京102209

出　　处：《化工进展》2021年第6期3215-3223,共9页Chemical Industry and Engineering Progress

摘　　要：以K_(2)CO_(3)对活性炭进行化学改性,考察K_(2)CO_(3)加入量对活性炭比表面积、孔容及孔径等物化性质的影响。随K_(2)CO_(3)与活性炭质量比(碱炭比)的增大,活性炭的比表面积呈现先增加后减小的趋势。当碱炭比为6∶1时,活性炭比表面积由初始的653.3m^(2)/g上升至1333.6m^(2)/g。以小分子砷化物三乙胂和大分子砷化物三苯基胂为模型化合物,配制高砷催化裂化汽油,测定催化剂的砷容和脱砷效率。实验结果表明,改性后的催化剂具有丰富的中孔-大孔多级孔结构,表现出更加优异的脱砷性能:微孔保证催化剂具有大的比表面积,使得活性组分能够高效分散;中孔-大孔有利于液态石油烃介质的扩散,从而增大砷化物与活性相的作用,提高催化剂脱砷效率。The activated carbon(AC)was chemically modified by K_(2)CO_(3),and the specific surface area,pore volume and pore size of the AC after modification were investigated.As the mass ratio of K_(2)CO_(3) to AC(alkali-carbon ratio)increased,the specific surface area of the modified AC showed a trend of increasing first and then decreasing.When the ratio of alkali to carbon was 6,the specific surface area of the modified AC increased from the initial 653.3m^(2)/g to 1333.6m^(2)/g.The modified AC was then used as the support to prepare an adsorption catalyst for arsenic removal,which exhibited excellent arsenic adsorption owing to the multi-level pore channels composed of micropore-mesopores.The micropore ensured the catalyst with a large specific surface area,so the active components can be efficiently dispersed on it,while the mesopore allowed the macromolecular arsenide to fully contact and react with the active metal components,and thus improved arsenic removal efficiency.

关 键 词：活性炭 碳酸钾改性 吸附 载体 催化剂 

分 类 号：TE624[石油与天然气工程—油气加工工程]