四氢萘催化裂化反应行为及生焦研究

石油炼制与化工 ›› 2023, Vol. 54 ›› Issue (3): 75-81.

四氢萘催化裂化反应行为及生焦研究

王永超,严加松,李蕊,王若瑜

中石化石油化工科学研究院有限公司

收稿日期:2022-07-04 修回日期:2022-08-19 出版日期:2023-03-12 发布日期:2023-03-23
通讯作者: 严加松 E-mail:yanjs.ripp@sinopec.com

STUDY ON CATALYTIC CRACKING BEHAVIOR AND COKE FORMATION OF TETRALIN

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Received:2022-07-04 Revised:2022-08-19 Online:2023-03-12 Published:2023-03-23

摘要/Abstract

摘要： 采用小型固定流化床（ACE）试验装置，在反应温度为460～540 ℃、质量空速为4～16 h^-1范围内研究了模型化合物四氢萘在稀土Y分子筛催化剂（REY-C）和超稳Y分子筛催化剂（USY-C）上催化裂化的反应行为及生焦规律。结果表明：四氢萘在REY-C、USY-C上的裂化产物类型相似，主要生成C3～C5烃以及C6～C10单环芳烃和茚满、甲基茚满、萘等双环芳烃；在REY-C、USY-C上，产物收率由大到小的顺序均为：双环芳烃＞单环芳烃＞非芳烃；分子筛的酸性强有利于催化裂化反应；焦炭的产率随着反应温度、四氢萘转化率、分子筛酸量的升高而增大，而随着空速的升高而降低。

关键词: 四氢萘, 催化裂化, 分子筛, 催化剂, 生焦, 反应机理

Abstract: Using a small fixed fluidized bed (ACE) test device, the catalytic cracking behavior and coke formation of tetralin as a model compound were studied over REY-C and USY-C catalysts at 460-540 ℃ and 4-16 h^-1 space velocity. The results showed that the cracking products of tetralin on REY-C and USY-C catalysts were similar, and the strong acidity of molecular sieves was beneficial to the catalytic cracking reaction, C3-C5 hydrocarbons, C6-C10 monocyclic aromatics and bis-cyclic aromatics such as indane, methylindane and naphthalene were mainly produced on REY-C, USY-C. The yield order of the products from large to small was bis-cyclic aromatic hydrocarbons, monocyclic aromatic hydrocarbons, non aromatic hydrocarbons. The yield of coke increased with the increase of reaction temperature, conversion and acid content of molecular sieve, and decreased with the increase of space velocity.

Key words: tetralin, catalytic cracking, molecular sieve, catalyst, coking, reaction mechanism

王永超严加松李蕊王若瑜. 四氢萘催化裂化反应行为及生焦研究[J]. 石油炼制与化工, 2023, 54(3): 75-81.

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