Deactivation analysis of catalyst for modified HZSM-5 catalytic lignin pyrolysis

TANG Songshan; PAN Zeyou; ZHANG Changsen; WANG Dengtai; XUE Xiangfei; CAO Yunfeng; LIU Yonggang; ZHANG Ruiqin

doi:10.11949/j.issn.0438-1157.20170764

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Deactivation analysis of catalyst for modified HZSM-5 catalytic lignin pyrolysis

更新时间：2025-12-10

- Deactivation analysis of catalyst for modified HZSM-5 catalytic lignin pyrolysis
- CIESC Journal Issue 12, Pages: 4739-4749(2017)
- 作者机构：
  
  1. 郑州大学化学与分子工程学院,河南,郑州,450001
  2. 天方药业有限公司,河南,驻马店,463000
  3. 河南省环境化学与低碳技术重点实验室,河南,郑州,450001
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20170764
  CLC： TQ032.4}
- Online First：05 December 2017，
  
  Published：05 December 2017
- 稿件说明：
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TANG Songshan, PAN Zeyou, ZHANG Changsen, et al. Deactivation analysis of catalyst for modified HZSM-5 catalytic lignin pyrolysis[J]. CIESC Journal, 2017, (12): 4739-4749.
DOI：

TANG Songshan, PAN Zeyou, ZHANG Changsen, et al. Deactivation analysis of catalyst for modified HZSM-5 catalytic lignin pyrolysis[J]. CIESC Journal, 2017, (12): 4739-4749. DOI： 10.11949/j.issn.0438-1157.20170764.

摘要

对0.3 mol·L-1 NaOH改性后的HZSM-5以及未改性HZSM-5催化剂进行循环和再生评价实验以考察催化剂的寿命。对反应后和再生的催化剂进行N2吸脱附以及NH3-TPD表征，并通过对反应后的催化剂进行SEM、TGA、FTIR、UV-Vis等表征分析催化剂积炭。两种催化剂的活性均随着循环实验次数的增加而逐渐降低，经4次循环实验的改性HZSM-5催化剂的催化活性远高于4次循环实验的未改性HZSM-5催化剂。反应过的催化剂经高温煅烧再生后其活性都有所恢复，再生后的改性HZSM-5的催化活性仍高于未改性催化剂。对两种不同催化剂积炭分析，改性后催化剂的积炭量少于未改性的催化剂，其积炭组分中高聚芳烃的含量相对较多。

Abstract

The circulation and regeneration experiments were employed to evaluate the lifetime of the two different catalysts (HZSM-5 and 0.3 mol·L-1 NaOH modified HZSM-5). The spent and regenerated catalysts were characterized by N2 adsorption-desorption and NH3-TPD techniques to analyse the reason of deactivation

and the spent catalysts were characterized by SEM

TGA

FTIR and UV-Vis techniques to analyse the coke deposited on the catalyst. The deactivation of the two different zeolites was become more and more serious along with the increase of the number of cycles. The difference was that the performance of 0.3 mol·L-1 NaOH modified HZSM-5 was better than the one of unmodified HZSM-5 after four cycles. The coke of the spent catalysts was removed through calcination in air at high temperature and the catalytic activity was recovered to a large extent. The performance of 0.3 mol·L-1 NaOH modified HZSM-5 was still better than the one of unmodified HZSM-5 after regeneration. The amount of coke deposited on the modified HZSM-5 was less than the one of unmodified HZSM-5. The coke of the modified HZSM-5 contains more condensed aromatics relatively.

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