石油炼制与化工 ›› 2020, Vol. 51 ›› Issue (2): 6-9.

• 催化剂 • 上一篇    下一篇

老化时间对催化裂化催化剂物性的影响

崔守业1,许友好1,刘新林2   

  1. 1. 中国石化石油化工科学研究院
    2. 中科(广东)炼化有限公司
  • 收稿日期:2019-09-05 修回日期:2019-09-30 出版日期:2020-02-12 发布日期:2020-02-27
  • 通讯作者: 崔守业 E-mail:cuishouye@sinopec.com
  • 基金资助:
     

EFFECT OF AGING TIME ON PHYSICAL PROPERTIES OF CATALYTIC CRACKING CATALYST

  1.  
  • Received:2019-09-05 Revised:2019-09-30 Online:2020-02-12 Published:2020-02-27
  • Supported by:
     

摘要: 采用固定流化床老化装置,水热老化温度为800 ℃、100%水蒸气和常压条件下,对催化裂化催化剂进行2~70 h的老化试验,考察老化时间对催化裂化催化剂物性的影响。采用XRD、BET、NH3-TPD、Py-IR和微反活性等表征手段对选取的不同老化时间的11个催化剂样品进行分析。结果表明:随着老化时间的延长,催化裂化催化剂相对结晶度、比表面积呈先快速降低后缓慢降低的趋势;弱L酸酸量与弱B酸酸量比、强L酸酸量与强B酸酸量比呈先增加后降低的趋势;催化剂微反活性宏观上表现出先快速下降后趋于平缓的趋势。

关键词: 催化裂化, 催化剂, 老化时间, 相对结晶度, 孔结构

Abstract: The catalytic cracking catalyst was aged for different duration from 2h to 70 h under the conditions of 800℃, 100 % steam and normal pressure in a fixed fluidized bed aging apparatus to investigate the physical properties changes of the catalyst. Eleven aged catalysts with different aging periods were analyzed by XRD, BET, NH3-TPD and Py-IR and MAT. The results showed that as the aging period increased, the relative crystallinities and the specific surface areas of the catalysts decreased rapidly and then slowly; the ratio of weak L acid to B acid and the ratio of strong L acid to B acid increased first and then decreased; the MAT of the catalyst decreased rapidly and then tended to be flat.

Key words: catalytic cracking, catalyst, aging period, relative crystalinity, pore structure

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