Effect of bimetallic catalysts on cracking behavior of coal tar model compounds

ZHANG Yanmin; ZOU Da; ZHAO Yuan; ZHONG Mei; MA Fengyun

doi:10.11949/j.issn.0438-1157.20170517

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Effect of bimetallic catalysts on cracking behavior of coal tar model compounds

更新时间：2025-12-10

- Effect of bimetallic catalysts on cracking behavior of coal tar model compounds
- CIESC Journal Issue 10, Pages: 3805-3815(2017)
- 作者机构：
  
  新疆大学化学化工学院, 新疆维吾尔自治区煤炭清洁转化与化工过程重点实验室,新疆,乌鲁木齐,830046
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20170517
  CLC： Q241.5
- Online First：05 October 2017，
  
  Published：05 October 2017
- 稿件说明：
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ZHANG Yanmin, ZOU Da, ZHAO Yuan, et al. Effect of bimetallic catalysts on cracking behavior of coal tar model compounds[J]. CIESC Journal, 2017, (10): 3805-3815.
DOI：

ZHANG Yanmin, ZOU Da, ZHAO Yuan, et al. Effect of bimetallic catalysts on cracking behavior of coal tar model compounds[J]. CIESC Journal, 2017, (10): 3805-3815. DOI： 10.11949/j.issn.0438-1157.20170517.

摘要

以Al2O3为载体，Ce、Co和Fe为助剂，采用机械化学法制备了4种镍基催化剂，对其进行了XRD、H2-TPR、BET、NH3-TPD等表征。当载气流量为50 ml·min-1，裂解温度为750℃时，在固定床反应器中考察了各催化剂对煤焦油模型化合物甲苯+芘裂解行为的影响。结果表明：4种催化剂均为介孔催化剂，且双金属催化剂的介孔有序度更高；催化剂中活性组分Ni主要以尖晶石NiAl2O4的形式存在；添加Fe助剂后，催化剂的酸强度较Ni/Al2O3增加，添加Ce和Co时则相反。评价实验表明，助剂对重质组分芘的裂解率影响较小，约为67%，然而Ce和Co对催化剂的抗积炭性能有利，其析碳分别较无助剂时降低28.8%和18.0%。

Abstract

Four nickel based catalysts were prepared by mechanical chemical method

Al2O3 as carrier

Co and Fe as additives.The catalysts were characterized using XRD

H2-TPR

BET and NH3-TPD.The catalytic effects on cracking behavior of coal tar model compounds toluene and pyrene were investigated in a fixed-bed reactor under carrier gas flow rate of 50 ml·min-1 and cracking temperature of 750℃.The experimental results showed that all four catalysts have higher ordered mesoporous structure and active species Ni mainly exists as NiAl2O4 spinel in the catalysts.In addition

acidic strength of catalyst with Fe additive was higher than that of Ni/Al2O3

while the opposite trend was observed in catalysts with Ce and Co additives.The cracking evaluation results showed that these additives have little effect on the cracking rate of heavy component pyrene

about 67% for all catalysts.However

Ce and Co additives were beneficial to carbon deposition resistance of catalysts

which carbon deposition

compared to none additive catalyst

was reduced by 28.8% and 18.0%

respectively.

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