Catalytic Pyrolysis of Sawdust with Desulfurized Fly Ash for Pyrolysis Gas Upgrading

Jinling Song, Chuyang Tang (), Xinyuan An, Yi Wang, Shankun Zhou and Chunhong Huang
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Jinling Song: School of Civil Engineering, University of Science and Technology Liaoning, Qianshan Road, Anshan 114051, China
Chuyang Tang: School of Civil Engineering, University of Science and Technology Liaoning, Qianshan Road, Anshan 114051, China
Xinyuan An: School of Civil Engineering, University of Science and Technology Liaoning, Qianshan Road, Anshan 114051, China
Yi Wang: School of Civil Engineering, University of Science and Technology Liaoning, Qianshan Road, Anshan 114051, China
Shankun Zhou: School of Civil Engineering, University of Science and Technology Liaoning, Qianshan Road, Anshan 114051, China
Chunhong Huang: School of Civil Engineering, University of Science and Technology Liaoning, Qianshan Road, Anshan 114051, China

IJERPH, 2022, vol. 19, issue 23, 1-11

Abstract: In this study, the catalytic effects of desulfurized fly ash (DFA) on the gaseous products of sawdust (SD) pyrolysis were investigated in a tubular furnace. The results indicated that DFA catalyzed the process of SD decomposition to improve the hydrogen content and the calorific value of pyrolysis gas. As to its effect on pyrolysis products, DFA increased the non-oxide content of CH 4 , C 3 H 4 , and H 2 in pyrolysis gas by 1.4-, 1.8-, and 2.3-fold, respectively. Meanwhile, the catalytic effect of DFA reduced the CO and CO 2 yields during DFA/SD pyrolysis. Based on the model compound method, CaSO 3 and Ca(OH) 2 in DFA was proved to have quite different catalytic effects on pyrolysis gas components. Ca(OH) 2 accelerated the formation of CH 4 and H 2 through the cracking of methoxyl during lignin and cellulose degradation, while CaSO 3 favored the generation of CO and CO 2 due to the carbonyl and carboxyl of lignin in SD. CaSO 3 also catalyzed SD pyrolysis to promote the C 3 H 4 yield in pyrolysis gas. Overall, the catalytic pyrolysis of SD with DFA yielded negative-carbon emission, which upgraded the quality of the pyrolysis gas.

Keywords: pyrolysis; catalytic; sawdust; desulfurized fly ash; pyrolysis gas upgrading (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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