石油学报(石油加工) ›› 2020, Vol. 36 ›› Issue (4): 832-838.doi: 10.3969/j.issn.1001-8719.2020.04.021

• 研究报道 • 上一篇    下一篇

煤焦油催化裂解过程钙-镁催化剂的抗积碳性能

颜浩1,巩明鑫1,王金玉1,王翠苹1,2   

  1. 1. 青岛大学 能源工程研究所,山东 青岛 266071;
    2. 山东科技大学 土木工程与建筑学院,山东 青岛 266590
  • 收稿日期:2019-07-09 修回日期:2019-12-20 出版日期:2020-07-25 发布日期:2020-09-23
  • 通讯作者: 王翠苹,女,教授,博士,从事清洁燃烧方面的研究,E-mail:wangcuiping@tsinghua.org.cn E-mail:wangcuiping@tsinghua.org.cn
  • 作者简介:第一作者:颜浩,男,硕士研究生,从事焦油化学链脱除方面的研究,E-mail:2540151554@qq.com
  • 基金资助:

    国家自然科学基金项目(51676102)资助

Anti-Carbon Deposition Performance of Ca-Mg Catalyst in Coal Tar Catalytic Cracking Process

 YAN Hao1,KONG Mingxin1, WANG Jinyu1, WANG Jinyu1,2   

  1.  1. Institute of Energy Engineering, Qingdao University, Qingdao 266071, China;
    2. College of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao 266590, China
  • Received:2019-07-09 Revised:2019-12-20 Online:2020-07-25 Published:2020-09-23
  • Supported by:
     

摘要: 采用两段式固定床反应器进行了煤焦油Ca-Mg催化裂解的实验研究,通过X射线衍射(XRD)、扫描电镜(SEM)及比表面积测试(BET)等手段表征反应前后Ca-Mg催化剂的物化特性,考察了添加Fe2O3助剂对Ca-Mg催化剂抗失活性能的影响。结果表明:长时间裂解反应中积炭叠加导致Ca-Mg催化剂失活,当积炭率达到3%~5%时,出现焦油裂解率降低的拐点;Ca-Mg催化剂中Fe2O3的加入,因积炭与Fe2O3发生慢速固-固反应,明显延迟了Ca-Mg催化剂活性拐点的出现,从而提高了Ca-Mg催化剂的抗积炭性能。

关键词: 钙-镁催化剂, 催化裂解, 煤焦油, 积炭, 抗失活

Abstract: A two-stage fixed-bed reactor was employed to investigate the catalytic cracking of coal-tar on calcium-magnesium catalysts surface. Physicochemical properties of the Ca-Mg catalyst before and after the reactions were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and specific surface area testing (BET). Effects of iron addition on the anti-deactivation activity of the Ca-Mg catalyst were discussed. Experimental results suggest that accumulation of carbonaceous deposits under long-time cracking reactions leads to the deactivation of Ca-Mg catalyst. When carbonaceous deposits ratio on the catalyst reaches 3%-5%, tar cracking activities will start to decrease. When Fe2O3 is added, the solid-solid reaction occurs between carbonaceous deposits and Fe2O3. This can postpone the inflection points of catalyst deactivity, and thus improve the capability of carbon deposition resistance of the Ca-Mg catalyst.

Key words: calcium-magnesium catalyst, catalytic cracking, coal tar, carbon deposit, anti-deactivation

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