Microwave pyrolysis of wheat straw: Product distribution and generation mechanism

Microwave pyrolysis of wheat straw is studied, combined with analysis of products, the distribution and generation pathway of products are investigated. Only a small amount of volatiles released when microwave pyrolysis of pure straw. Mixtures of adding CuO and Fe3O4 can pyrolyze, and the majority i...

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Bibliographic Details
Published in:Bioresource technology 2014-04, Vol.158, p.278-285
Main Authors: Zhao, Xiqiang, Wang, Wenlong, Liu, Hongzhen, Ma, Chunyuan, Song, Zhanlong
Format: Article
Language:English
Subjects:
Biological and medical sciences
Biomass
Carbon
Carbon monoxide
Conversion
COPPER OXIDE
Food industries
Fundamental and applied biological sciences. Psychology
Hydrolysis
Microwaves
Pyrolysis
Residues
Straw
Triticum - metabolism
Use and upgrading of agricultural and food by-products. Biotechnology
Wheat
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Summary:Microwave pyrolysis of wheat straw is studied, combined with analysis of products, the distribution and generation pathway of products are investigated. Only a small amount of volatiles released when microwave pyrolysis of pure straw. Mixtures of adding CuO and Fe3O4 can pyrolyze, and the majority in pyrolysis products is in liquid-phase. Severe pyrolysis occur after adding carbon residue, the CO content in pyrolysis gas products is high, and the maximum volume content of H2 can exceed 35 vol.%. The high-temperature is helpful for increasing the yield of combustible gas in gaseous products, in particular the H2 production, but also helpful for improving the conversion of sample. Pyrolysis is carried out layer by layer from the inside to outside. As the internal material firstly pyrolyze and pyrolysis products released pass through the low temperature zone, the chance of occurrence of secondary reactions is reduced.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2014.01.094