Preparation of mesoporous ZSM-5 catalysts using green templates and their performance in biomass catalytic pyrolysis. (October 2019)

• Record Type: Journal Article
• Authors: Che, Qingfeng; Yang, Minjiao; Wang, Xianhua; Yang, Qing; Chen, Yingquan; Chen, Xu; Chen, Wei; Hu, Junhao; Zeng, Kuo; Yang, Haiping; Chen, Hanping
• Is Part Of: Bioresource technology. Volume 289(2019)
• Publication Date: 2019-10
• Subjects: Mesoporous ZSM-5 -- Green template -- Biomass -- Catalytic pyrolysis -- Aromatic production; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2019.121729
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Mesoporous ZSM-5 was prepared and modified with green templates. ZSM-ST exhibited the highest catalytic activity for aromatic production. The BTX yield is positively correlated with the mesopore volume of the catalyst. Abstract: The micropores present in ZSM-5 are beneficial to the production of aromatic compounds in biomass catalytic pyrolysis, although the small pore size leads to severe coke deposition on the catalyst. In this study, a micro-mesoporous structured ZSM-5 zeolite catalyst was synthesized and modified with green templates (sucrose, cellulose, and starch) to introduce additional mesopores. It was found that the catalysts modified using the sucrose and cellulose templates only exhibited a slight increase in their micropore volumes, while the mesopore volume of ZSM-ST (modified with the starch template) reached up to 0.359 cm 3 /g. This increase promoted the cracking of bulky oxygenates and suppressed the polymerization reaction on the ZSM-5 surface, thereby producing a greater number of aromatic products. Moreover, the benzene, toluene, and xylene (BTX) yields exhibited a positive correlation with the catalyst mesopore volume, with the highest BTX yield of 91.84 mg/g being obtained with 10% starch addition.