无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2019, Vol. 51 ›› Issue (5): 78-81.

• 催化材料 • 上一篇    下一篇

镍系催化剂的制备、表征及其甲烷化性能的研究

鲁杰,吴华东(),马尚,张林锋,严才成,郭嘉()   

  1. 武汉工程大学化工与制药学院,绿色化工过程教育部重点实验室,湖北武汉 430073
  • 收稿日期:2018-11-12 出版日期:2019-05-10 发布日期:2020-04-28
  • 作者简介:鲁杰(1992— ),男,硕士研究生,主要研究方向为高温甲烷化催化剂;E-mail:362348357@qq.com。
  • 基金资助:
    国家自然科学基金青年基金(21503152)

Preparation and characterization of nickel-based catalyst and its methanation performance

Lu Jie,Wu Huadong(),Ma Shang,Zhang Linfeng,Yan Caicheng,Guo Jia()   

  1. Key Laboratory for Green Chemical Process of Ministry of Education,School of Chemical andPharmaceutical Engineering,Wuhan Instituteof Technology,Wuhan 430073,China
  • Received:2018-11-12 Published:2019-05-10 Online:2020-04-28

摘要:

采用混合法在球磨机内制备了高温合成气制甲烷的催化剂载体,并添加不同质量二氧化钛和氧化镧助剂对其做了改性,经焙烧成型和负载后进行甲烷化催化反应。表征了成型催化剂的机械强度、BET、氢气程序升温还原(H2-TPR)、TPD、TG、X射线衍射(XRD)等,并在固定床反应器中评价其甲烷化催化反应性能。结果表明,所制备的催化剂在600 ℃以上,2 MPa条件下可稳定使用,且具有较高的催化活性、抗烧结及抗积炭特性。TiO2助剂的添加提高了催化剂的机械性能和耐高温性能,而La2O3助剂的添加有利于镍在载体表面的分散,增加催化剂的活性,降低了载体的表面酸性,抑制了积炭的产生,因此可以延长催化剂的使用寿命。

关键词: 镍系催化剂, 甲烷, 二氧化钛, 氧化镧

Abstract:

The catalyst carrier for methane production from syngas at high temperature was prepared in a ball mill by mixing method.The catalyst carrier was modified by adding additives TiO2 and La2O3 with different quality.After calcination and loading,methanation reaction was carried out.The mechanical strength and BET of the catalyst was tested,and the catalyst was also characterized by hydrogen temperature-programmed reduction(H2-TPR),TPD,TG and XRD etc.,and its methanation catalytic performance was evaluated in a fixed-bed reactor.The results showed that the prepared catalyst could be used stably under the condition of above 600 ℃ and 2 MPa,and had higher catalytic activity,anti-sintering and anti-carbon properties.The addition of TiO2 could improve the mechanical properties and high temperature resistance of the catalyst,while the addition of La2O3 helped to disperse nickel on the surface of the support,increase the activity of the catalyst,reduce the surface acidity of the support,and inhibit the formation of carbon.Thus,the service life of the catalyst could be prolonged.

Key words: nickel-based catalysts, methane, titanium dioxide, lanthanum oxide

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