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Title: Catalytic fast pyrolysis of bamboo sawdust via a two-step bench scale bubbling fluidized bed/fixed bed reactor: Study on synergistic effect of alkali metal oxides and HZSM-5

Abstract

Catalytic fast pyrolysis of bamboo sawdust was conducted by a tandem bubbling fluidized bed/fixed bed reactor. Effect of pyrolysis and catalyst temperatures on product yield was studied. In addition, synergistic effect of HZSM-5 and base catalysts (including CaO, MgO, and SrO) for the promotion of aromatic hydrocarbons was revealed. Experimental results illustrated that both pyrolytic and catalytic reactor temperatures played pivotal roles in the yield of bio-oil, and the optimal pyrolysis and catalytic reactor temperatures were 550 °C and 500 °C, respectively. Ex-situ catalytic trial decreased the yield of bio-oil compared to in-situ run, while it facilitated the formation of phenol and alkylphenols. Mixed catalytic upgrading modes exhibited more significant aromatization and deoxygenation activities than sequential ones. In particular, ex-situ run using CaO mixed with HZSM-5 increased the concentration of aromatic hydrocarbons to 31.34%, which was ~11.48% higher than that derived from CaO and HZSM-5 sequentially processed mode. The dominated products in alkylphenols were cresol isomers and ethylphenols, and compared to sequential cases, mixed catalytic upgrading trials promoted the relative selectivity of phenol. Synergistic effect of base catalysts and HZSM-5 contributed to the production of monocyclic aromatic hydrocarbons, and CaO mixed with HZSM-5 mode showed the most prominent synergistic effectmore » for the enhanced relative selectivity to xylenes and toluene.« less

Authors:
 [1];  [2];  [3];  [2];  [4];  [4];  [2]; ORCiD logo [5];  [6]
  1. Southeast Univ., Jiangsu (China); Univ. of Tennessee, Knoxville, TN (United States)
  2. Southeast Univ., Jiangsu (China)
  3. Southeast Univ., Jiangsu (China); Univ. of Minnesota, St. Paul, MN (United States)
  4. Univ. of Tennessee, Knoxville, TN (United States)
  5. Univ. of Minnesota, St. Paul, MN (United States)
  6. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1484104
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Energy Conversion and Management; Journal Volume: 176; Journal Issue: C
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Catalytic fast pyrolysis; Bamboo sawdust; Base catalysts; HZSM-5; Synergistic effect

Citation Formats

Wang, Jia, Zhong, Zhaoping, Ding, Kuan, Deng, Aidong, Hao, Naijia, Meng, Xianzhi, Ben, Haoxi, Ruan, Roger, and Ragauskas, Arthur J. Catalytic fast pyrolysis of bamboo sawdust via a two-step bench scale bubbling fluidized bed/fixed bed reactor: Study on synergistic effect of alkali metal oxides and HZSM-5. United States: N. p., 2018. Web. doi:10.1016/j.enconman.2018.09.029.
Wang, Jia, Zhong, Zhaoping, Ding, Kuan, Deng, Aidong, Hao, Naijia, Meng, Xianzhi, Ben, Haoxi, Ruan, Roger, & Ragauskas, Arthur J. Catalytic fast pyrolysis of bamboo sawdust via a two-step bench scale bubbling fluidized bed/fixed bed reactor: Study on synergistic effect of alkali metal oxides and HZSM-5. United States. doi:10.1016/j.enconman.2018.09.029.
Wang, Jia, Zhong, Zhaoping, Ding, Kuan, Deng, Aidong, Hao, Naijia, Meng, Xianzhi, Ben, Haoxi, Ruan, Roger, and Ragauskas, Arthur J. Mon . "Catalytic fast pyrolysis of bamboo sawdust via a two-step bench scale bubbling fluidized bed/fixed bed reactor: Study on synergistic effect of alkali metal oxides and HZSM-5". United States. doi:10.1016/j.enconman.2018.09.029.
@article{osti_1484104,
title = {Catalytic fast pyrolysis of bamboo sawdust via a two-step bench scale bubbling fluidized bed/fixed bed reactor: Study on synergistic effect of alkali metal oxides and HZSM-5},
author = {Wang, Jia and Zhong, Zhaoping and Ding, Kuan and Deng, Aidong and Hao, Naijia and Meng, Xianzhi and Ben, Haoxi and Ruan, Roger and Ragauskas, Arthur J.},
abstractNote = {Catalytic fast pyrolysis of bamboo sawdust was conducted by a tandem bubbling fluidized bed/fixed bed reactor. Effect of pyrolysis and catalyst temperatures on product yield was studied. In addition, synergistic effect of HZSM-5 and base catalysts (including CaO, MgO, and SrO) for the promotion of aromatic hydrocarbons was revealed. Experimental results illustrated that both pyrolytic and catalytic reactor temperatures played pivotal roles in the yield of bio-oil, and the optimal pyrolysis and catalytic reactor temperatures were 550 °C and 500 °C, respectively. Ex-situ catalytic trial decreased the yield of bio-oil compared to in-situ run, while it facilitated the formation of phenol and alkylphenols. Mixed catalytic upgrading modes exhibited more significant aromatization and deoxygenation activities than sequential ones. In particular, ex-situ run using CaO mixed with HZSM-5 increased the concentration of aromatic hydrocarbons to 31.34%, which was ~11.48% higher than that derived from CaO and HZSM-5 sequentially processed mode. The dominated products in alkylphenols were cresol isomers and ethylphenols, and compared to sequential cases, mixed catalytic upgrading trials promoted the relative selectivity of phenol. Synergistic effect of base catalysts and HZSM-5 contributed to the production of monocyclic aromatic hydrocarbons, and CaO mixed with HZSM-5 mode showed the most prominent synergistic effect for the enhanced relative selectivity to xylenes and toluene.},
doi = {10.1016/j.enconman.2018.09.029},
journal = {Energy Conversion and Management},
number = C,
volume = 176,
place = {United States},
year = {Mon Sep 17 00:00:00 EDT 2018},
month = {Mon Sep 17 00:00:00 EDT 2018}
}