Enhancement in the aromatic yield from the catalytic fast pyrolysis of rice straw over hexadecyl trimethyl ammonium bromide modified hierarchical HZSM-5

Zihao Zhang; Hao Cheng; Hao Chen; Kequan Chen; Xiuyang Lu; Pingkai Ouyang; Jie Fu

doi:10.1016/j.biortech.2018.02.036

Enhancement in the aromatic yield from the catalytic fast pyrolysis of rice straw over hexadecyl trimethyl ammonium bromide modified hierarchical HZSM-5

Bioresour Technol. 2018 May:256:241-246. doi: 10.1016/j.biortech.2018.02.036. Epub 2018 Feb 8.

Authors

Zihao Zhang¹, Hao Cheng², Hao Chen¹, Kequan Chen³, Xiuyang Lu¹, Pingkai Ouyang³, Jie Fu⁴

Affiliations

¹ Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.
² Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China; State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China.
³ State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China.
⁴ Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China. Electronic address: jiefu@zju.edu.cn.

PMID: 29453050
DOI: 10.1016/j.biortech.2018.02.036

Abstract

Modified H-type ZSM-5 (HZSM-5) catalysts were prepared using hexadecyl trimethyl ammonium bromide (CTAB) as mesopore templates to enhance the activity for the catalytic fast pyrolysis of rice straw for aromatics compounds. A certain quantity of CTAB added into the HZSM-5 (HZ) forming hierarchical structure exhibited an improvement in the yield of the aromatics and a decrease in the yield of coke in comparison with that of bare HZ. In contrast, excessive CTAB addition resulted in a decrease in aromatic yield and an increase in coke yield. The effects of crystallinity, textural properties, morphological structure and acidity distribution on the production of aromatic compounds were measured by XRD, BET, TEM and NH₃-TPD. The good crystallinity, small amount of mesopore formation and highest total acidity discovered in HZ-0.01 (the mole ratio of CTAB/SiO₂ is 0.01) provided the highest aromatic compound yield of 26.8% and the lowest coke yield of 39.2%.

Keywords: Aromatics; Biomass; Catalytic fast pyrolysis; Hierarchical HZSM-5.

MeSH terms

Biomass
Catalysis
Cetrimonium
Cetrimonium Compounds*
Oryza*
Silicon Dioxide

Substances

Cetrimonium Compounds
Silicon Dioxide
Cetrimonium