化工进展 ›› 2021, Vol. 40 ›› Issue (6): 3215-3223.DOI: 10.16085/j.issn.1000-6613.2020-1311

• 工业催化 • 上一篇    下一篇

活性炭改性对催化剂脱砷性能的影响

冯琪1(), 姜增琨1, 李阳2(), 鞠雅娜1, 赵秦峰1, 李天舒2, 钟海军1, 葛少辉1()   

  1. 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
  • 收稿日期:2020-07-13 修回日期:2020-11-11 出版日期:2021-06-06 发布日期:2021-06-22
  • 通讯作者: 李阳,葛少辉
  • 作者简介:冯琪(1990—),女,硕士,研究方向为汽油加氢催化剂制备。E-mail:fengqi010@petrochina.com.cn

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

FENG Qi1(), JIANG Zengkun1, LI Yang2(), JU Ya’na1, ZHAO Qinfeng1, LI Tianshu2, ZHONG Haijun1, GE Shaohui1()   

  1. 1.Petrochemical Research Institute, CNPC, Beijing 102209, China
    2.Key Laboratory of Clean Fuel, CNPC, Beijing 102209, China
  • Received:2020-07-13 Revised:2020-11-11 Online:2021-06-06 Published:2021-06-22
  • Contact: LI Yang,GE Shaohui

摘要:

以K2CO3对活性炭进行化学改性,考察K2CO3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K2CO3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653.3m2/g上升至1333.6m2/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。

关键词: 活性炭, 碳酸钾改性, 吸附, 载体, 催化剂

Abstract:

The activated carbon (AC) was chemically modified by K2CO3, and the specific surface area, pore volume and pore size of the AC after modification were investigated. As the mass ratio of K2CO3 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 653.3m2/g to 1333.6m2/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.

Key words: activated carbon, modification by potassium carbonate (K2CO3), adsorption, support, catalyst

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