Effect of steam atmosphere on cracking behavior and carbon deposition of coal tar model compounds

ZHAI Jianrong; ZHONG Mei; MA Fengyun; HU Haoquan

doi:10.11949/j.issn.0438-1157.20181375

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Effect of steam atmosphere on cracking behavior and carbon deposition of coal tar model compounds

更新时间：2026-07-24

- Effect of steam atmosphere on cracking behavior and carbon deposition of coal tar model compounds
- CIESC Journal Vol. 70, Issue 8, Pages: 2898-2908(2019)
- 作者机构：
  
  1.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
  2.大连理工大学化工学院，煤化工研究所，精细化工国家重点实验室，辽宁大连 116024
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20181375
  CLC： O 643.32
- Received：19 November 2018，
  
  Revised：2018-12-14，
  
  Online First：24 July 2026，
  
  Published：05 August 2019
- 稿件说明：
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翟建荣, 钟梅, 马凤云, 胡浩权. 水蒸气对煤焦油模化物裂解行为及析碳的影响[J]. 化工学报, 2019, 70(8): 2898-2908

ZHAI Jianrong, ZHONG Mei, MA Fengyun, HU Haoquan. Effect of steam atmosphere on cracking behavior and carbon deposition of coal tar model compounds[J]. CIESC Journal, 2019, 70(8): 2898-2908
翟建荣, 钟梅, 马凤云, 胡浩权. 水蒸气对煤焦油模化物裂解行为及析碳的影响[J]. 化工学报, 2019, 70(8): 2898-2908 DOI： 10.11949/j.issn.0438-1157.20181375.

ZHAI Jianrong, ZHONG Mei, MA Fengyun, HU Haoquan. Effect of steam atmosphere on cracking behavior and carbon deposition of coal tar model compounds[J]. CIESC Journal, 2019, 70(8): 2898-2908 DOI： 10.11949/j.issn.0438-1157.20181375.

摘要

采用机械化学法制备Ni-Ce/Al

催化剂，在固定床反应器中考察了水蒸气气氛对煤焦油模型化合物甲苯＋芘催化裂解行为的影响。根据产物生成规律提出了芘向萘转化的裂解机理，并以D

O对其进行了验证。通过XRD、TG-DTG和Raman等表征了析碳的类型与结构特征。结果表明：相较于纯氮气气氛，水的加入可明显提升重质组分芘的裂解率，且随水碳比（S/C）增加呈先增加后降低的趋势，在S/C=0.15时达到最大值98.93%，比S/C=0时增加32.09%。析碳率随S/C比增加一直呈下降趋势，由S/C=0时的10.04%降至S/C=0.26时的5.39%。析碳分析结果表明，S/C=0时，生成的积炭类型主要是β型碳及γ型碳，水蒸气存在时，活性较高的α型碳含量增加，说明水蒸气的持续消碳作用抑制了C

向C

与C

方向转化。

Abstract

The Ni-Ce/Al

catalyst was synthesized

via

mechanochemical method. The effects of steam on the cracking behavior of toluene and pyrene as coal tar model compounds were investigated in a fixed bed reactor. Based on the product distribution

the cracking mechanism of the conversion of pyrene to naphthalene was proposed and verified by D

O as a tracer. The types and structural characteristics of carbon deposition on the spent catalysts were characterized by XRD

TG-D

TG and Raman

etc

. The results showed that the addition of steam obviously enhanced the cracking rate of pyrene

compared with the pure nitrogen atmosphere

and it increased first and then decreased with the increase of steam-carbon ratio (S/C) and reaching a maximum of 98.93% at S/C=0.15

increased by 32.09% in comparison with S/C=0. A downward trend was that the yield of carbon decomposition decreased from 10.04% to 5.39% with the increase of S/C ratio from 0 to 0.26. In addition

carbon analysis results show that the main type of carbon deposits were β-type and γ-type at S/C=0. On the contrary

in the presence of steam

the activity of higher α-type carbon content increased. Therefore

it indicated that the carbon elimination by steam inhibited the conversion of C

to C

and C

关键词

Keywords

references

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