Catalytic Fast Pyrolysis of Cellulose by Integrating Dispersed Nickel Catalyst with HZSM-5 Zeolite

2017 3rd International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Lei, Xiaojuan^1 ; Bi, Yadong^1 ; Zhou, Wei^1 ; Chen, Hui^1 ; Hu, Jianli^2

Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemical Engineering, Tianjin University of Technology, Tianjin

300384, China^1

Department of Chemical and Biomedical Engineering, West Virginia University, Morgantown

26506, United States^2

关键词: Active components;    Carbon substrates;    Cellulose substrates;    HZSM-5 zeolites;    Lignocellulosic biomass;    Liquid products;    Nickel nanoparticles;    Oxygen-containing compounds;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/108/2/022017/pdf
DOI  :  10.1088/1755-1315/108/2/022017

来源: IOP

【 摘 要 】

The effect of integrating dispersed nickel catalyst with HZSM-5 zeolite on upgrading of vapors produced from pyrolysis of lignocellulosic biomass was investigated. The active component nickel nitrate was introduced onto the cellulose substrate by impregnation technique. Based on TGA experimental results, we discovered that nickel nitrate first released crystallization water, and then successively decomposed into nickel oxide which was reduced in-situ to metallic nickel through carbothermal reduction reaction. In-situ generated nickel nanoparticles were found highly dispersed over carbon substrate, which were responsible for catalyzing reforming and cracking of tars. In catalytic fast pyrolysis of cellulose, the addition of nickel nitrate caused more char formation at the expense of the yield of the condensable liquid products. In addition, the selectivity of linear oxygenates was increased whereas the yield of laevoglucose was reduced. Oxygen-containing compounds in pyrolysis vapors were deoxygenated into aromatics using HZSM-5. Moreover, the amount of condensable liquid products was decreased with the addition of HZSM-5.