化工进展 ›› 2021, Vol. 40 ›› Issue (1): 221-226.DOI: 10.16085/j.issn.1000-6613.2020-0294

• 工业催化 • 上一篇    下一篇

焙烧气氛对K2CO3/γ-Al2O3吸附剂脱除异戊二烯中二硫化碳 性能的影响

孟令刚1(), 张现策1, 李芹1, 姜伟丽1, 周红军1,2, 龚学成1, 周广林1,2()   

  1. 1.中国石油大学(北京)新能源与材料学院,北京 102249
    2.生物燃气高值利用北京市重点实验室,北京 102249
  • 收稿日期:2020-03-02 出版日期:2021-01-05 发布日期:2021-01-12
  • 通讯作者: 周广林
  • 作者简介:孟令刚(1995—),男,硕士研究生,研究方向为油气加工工艺与工程。E-mail:603549641@qq.con

Effect of calcination atmosphere on K2CO3/γ-Al2O3 adsorbent for removing carbon disulfide from isoprene

Linggang MENG1(), Xiance ZHANG1, Qin LI1, Weili JIANG1, Hongjun ZHOU1,2, Xuecheng GONG1, Guanglin ZHOU1,2()   

  1. 1.College of New Energy and Materials, China University of Petroleum-Beijing, Beijing 102249, China
    2.Beijing Key Laboratory of Biogas High Value Utilization, Beijing 102249, China
  • Received:2020-03-02 Online:2021-01-05 Published:2021-01-12
  • Contact: Guanglin ZHOU

摘要:

采用等体积浸渍法将碳酸钾负载在氧化铝载体上,经不同气氛焙烧制备了K2CO3/γ-Al2O3吸附剂,考察了不同焙烧气氛对K2CO3/γ-Al2O3吸附剂在异戊二烯中吸附脱除二硫化碳性能的影响。采用XRD、压汞、CO2-TPD、FTIR等手段对吸附剂的晶体结构、孔道结构、碱性活性位点、表面官能团等进行了表征分析。结果表明,不同焙烧气氛能够影响K2CO3/γ-Al2O3吸附剂的脱硫能力且其与吸附剂的孔道结构、K2CO3活性位点的数目分布、 H—O、C?????O化学键有关。其中,在空气焙烧气氛下所得的K2CO3/γ-Al2O3吸附剂吸附脱除异戊二烯中二硫化碳的吸附性能最佳。在常温常压下,当剂油质量比为1∶10时,可以将异戊二烯原料油中硫含量由2000mg/kg降至769mg/kg,吸附剂硫容(质量分数)达到1.23%。

关键词: 氧化铝, 吸附, 吸附剂

Abstract:

K2CO3/γ-Al2O3 adsorbents were prepared by calcination in different atmospheres with potassium carbonate supported on alumina carrier by equal volume impregnation method. The effect of different calcination atmosphere on the performance of the K2CO3/γ-Al2O3 adsorbents for removing carbon disulfide from isoprene was investigated. XRD, mercury intrusion, CO2-TPD, FTIR were used to characterize and analyze the crystal structure, pore structure, basic active sites, surface functional groups of the adsorbents. The results show that the calcination atmosphere can affect the desulfurization capacity of the K2CO3/γ-Al2O3 adsorbent, which is related to the pore structure of the adsorbent, the distribution of K2CO3 active sites, and the H—O and C?????O chemical bonds. Among these adsorbents, the K2CO3/γ-Al2O3 adsorbent calcinated in air has the best adsorption performance for the removal of carbon disulfide in isoprene. At normal temperature and pressure, when the mass ratio of adsorbent to oil was 1∶10, the sulfur content in the isoprene was reduced from 2000mg/kg to 769mg/kg, and the sulfur capacity of the adsorbent reached 1.23%.

Key words: alumina, adsorb, adsorbent

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