Chemical Industry and Engineering Progress ›› 2020, Vol. 39 ›› Issue (S2): 221-226.DOI: 10.16085/j.issn.1000-6613.2020-0413

• Industrial catalysis • Previous Articles     Next Articles

Adsorption behavior of thiophene on Co-Mo/γ-Al2O3 catalyst by in-situ IR

Junlin CHEN1(), Jigang ZHAO1(), Hongbo JIANG1, Wenbin CHEN2, Kang QIN2, Benxian SHEN1   

  1. 1.International Joint Research Center for Green Energy Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
    2.Research Institute of Petroleum Processing, SINOPEC, Beijing 100083, China
  • Received:2020-03-20 Online:2020-11-17 Published:2020-11-20
  • Contact: Jigang ZHAO

原位红外研究噻吩在硫化后Co-Mo/γ-Al2O3催化剂上吸附行为

陈俊霖1(), 赵基钢1(), 江洪波1, 陈文斌2, 秦康2, 沈本贤1   

  1. 1.华东理工大学化工学院,绿色能源化工国际联合研究中心,上海 200237
    2.中国石化石油化工科学研究院,北京 100083
  • 通讯作者: 赵基钢
  • 作者简介:陈俊霖(1994—),男,硕士研究生,研究方向为加氢脱硫催化剂。E-mail:y30171100@mail.ecust.edu.cn
  • 基金资助:
    国家重点研发计划(2017YFB0306600)

Abstract:

Against the background of declining heavy oil quality and rising diesel sulfur standards, in order to improve hydrodesulfurization catalysts and production processes, the in-situ IR was used to study the sulfurization behavior of Co-Mo/γ-Al2O3 catalyst whose industrial direct desulfurization activity is higher and adsorption behavior of thiophene. Co-Mo/γ-Al2O3 catalyst surface was sulfided at 320℃, and during thiophene-temperature programmed desorption on sulfided catalyst, the thiophene adsorption characteristic peaks at 1558cm-1 (CC vibration) and 1413cm-1 (CH vibration) disappeared at 250℃(π complex adsorption); peaks at 1679, 1575cm-1 (CC vibration ) and 1396cm-1 (CH vibration) disappeared at 350℃(M-S adsorption), but peaks at 1537cm-1, 1513cm-1 (CC vibration) and 1338cm-1 (CH vibration) strengthened (π complex adsorption). This clarifies the relationship between adsorption mode and desorption temperature of thiophene, which provides experimental data support for the design and development of higher activity catalysts.

Key words: HDS, catalyst, adsorption, thiophene, Co-Mo/γ-Al2O3, in-situ IR, sulfurization

摘要:

在原油质量下降的趋势和柴油硫含量标准不断提升的背景下,为提升加氢脱硫催化剂催化活性及改进清洁油品的生产工艺,本文采用原位红外技术研究工业用直接脱硫路径活性较高的Co-Mo/γ-Al2O3催化剂的硫化行为和噻吩的吸附行为。实验结果表明,Co-Mo/γ-Al2O3催化剂的表面在约320℃硫化,噻吩在硫化后的Co-Mo/γ-Al2O3催化剂上原位升温脱附的过程中,噻吩的CC伸缩振动峰(1558cm-1)和CH面内弯曲振动峰(1413cm-1)在约250℃消失(对应π络合吸附);CC伸缩振动峰(1679、1575cm-1)和CH面内弯曲振动峰(1396cm-1)在约350℃消失(对应M-S吸附);而CC伸缩振动峰(1537、1513cm-1)和CH面内弯曲振动峰(1338cm-1)持续增强(对应π络合吸附)。这明晰了噻吩的吸附方式与其脱附温度之间的关系,为新型加氢脱硫催化剂的设计开发提供了试验数据支持。

关键词: 加氢脱硫, 催化剂, 吸附, 噻吩, Co-Mo/γ-Al2O3, 原位红外, 硫化

CLC Number: 

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