Hydrocarbon selectivity enhancement through catalytic fast co-pyrolysis of almond shell and plastic blends

Chemical and Biological Technologies in Agriculture

Research

A. Alcazar-Ruiz¹  F. Dorado¹  L. Sanchez-Silva¹ 

[1] Department of Chemical Engineering, University of Castilla-La Mancha, Avda. Camilo José Cela 12, 13071, Ciudad Real, Spain;

关键词: Almond shell;    Catalytic co-fast pyrolysis;    Hydrocarbon selectivity;    Polyethylene;    Polystyrene;    Aromatics;   

DOI  :  10.1186/s40538-023-00431-6

 received in 2023-03-06, accepted in 2023-06-15,  发布年份 2023

来源: Springer

【 摘 要 】

BackgroundThe aim of this article is to explore possible pathways for the synergistic optimization of bio-oil by the catalytic fast co-pyrolysis of almond shell (AS) and plastic residues (polyethylene, PE, and polystyrene, PS). Pyrolysis was carried out at 650 °C at a heating rate of 20 °C/ms at a residence time of 20 s. Hydrogen from the plastic promoted the decarboxylation of acids and decarbonylation of carbonyls and sugars from biomass waste.ResultsCo-pyrolysis results showed a fall in oxygen in the AS/plastics blends, whereas carbon yields increased as did the calorific value of the oil. As expected, AS/PE blends enhanced production of hydrocarbon fractions, especially olefins, with yields reaching 81.1%, whereas AS/PS blends enhanced formation of aromatic compounds. HZSM-5 assisted the increase of monocyclic aromatics content in AS/PE blends. AS/PS blends favoured the increased of aromatics (45% of total hydrocarbons for 1:2 AS/PE-HZ). For AS/PS-HZ blends toluene was enhanced as was the production of 1,3,5-cycloheptatriene.ConclusionsThese findings helped to gain a great insight into how catalytic co-fast pyrolysis of feedstocks can enhance the formation of value-added products, promoting their economic potential for agricultural exploitations.Graphical Abstract

【 授权许可】

CC BY   
© The Author(s) 2023

【 图 表 】

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Fig. 5

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