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Chemistry and Industry of Forest Products ›› 2024, Vol. 44 ›› Issue (2): 55-63.doi: 10.3969/j.issn.0253-2417.2024.02.008

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Preparation of Iron Based Carbon Aluminum Catalyst and Its Catalytic for Hydrogen Production from Corn Straw Pyrolysis

Yan LU1(), Xueqin LI1,2, Yanling LI1, Tanglei SUN1, Peng LIU1,*(), Tingzhou LEI1   

  1. 1. Institute of Urban & Rural Mining, Changzhou University; Changzhou Key Laboratory of Biomass Green, Safe & High Value Utilization Technology, Changzhou 213164, China
    2. School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
  • Received:2023-07-18 Online:2024-04-28 Published:2024-04-23
  • Contact: Peng LIU E-mail:893667124@qq.com;liupeng@cczu.edu.cn

Abstract:

An iron-based carbon-aluminum catalyst(Fe/CS-AWA) was prepared using hydrothermal carbonization(HTC) method, using corn stover(CS) biomass as the raw material, activated aluminum ash(AWA) activated by waste aluminum ash(WA) as a carrier and Fe as the active component. The Fe/CS-AWA was applied in catalyzing the pyrolysis of CS for hydrogen production. By investigating the influence of Fe loading on the catalyst performance, the hydrothermal carbonization conditions on the structural properties of Fe/CS-AWA and the effect of catalytic CS pyrolysis on hydrogen production were further optimized using response surface methodology(RSM).The results indicated that compared with CS pyrolysis, AWA and CS mixed hydrothermal carbonization as a catalyst increased the hydrogen production capacity of CS pyrolysis by 19. 11 mL/g. More importantly, Fe enhanced the catalytic activity of CS-AWA, with a gas total yield of 160. 93 mL/g and hydrogen proportion of 39.96% when the Fe loading was 10%. The optimized process conditions from RSM were as follows: mAWAmCS of 2 ∶ 1, residence time of 60 min at 250 ℃, and a carbonization temperature of 500 ℃. Under these conditions, the gas total yield for Fe/CS-AWA catalyzing CS pyrolysis was 267. 43 mL/g, with a H2 proportion of 37. 80%. It was found that characterization revealed the formation of irregular iron carbides and Al—O—C intermediates on the surface of Fe/CS-AWA, enhancing the catalytic activity of Fe/CS-AWA.

Key words: aluminum ash, hydrothermal carbon, carbon aluminum catalyst, response surface method, hydrogen production through pyrolysis

CLC Number: