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老化时间对催化裂化催化剂物性的影响
引用本文:崔守业 许友好 刘新林. 老化时间对催化裂化催化剂物性的影响[J]. 石油炼制与化工, 2006, 51(2): 6-9
作者姓名:崔守业 许友好 刘新林
作者单位: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;
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  
收稿时间:2019-09-05

EFFECT OF AGING TIME ON PHYSICAL PROPERTIES OF CATALYTIC CRACKING CATALYST
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.
Keywords:catalytic cracking  catalyst  aging period  relative crystalinity  pore structure  
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