Catalytic steam reforming of in-situ tar from rice husk over MCM-41 supported LaNiO3 to produce hydrogen rich syngas

Chenlong Liu, Dong Chen, Yongan Cao, Tianxi Zhang, Yangyang Mao, Wenju Wang, Zhigang Wang and Sibudjing Kawi

Renewable Energy, 2020, vol. 161, issue C, 408-418

Abstract: In this paper, a series of catalysts loaded with different amount of LaNiO3 on MCM-41 supported were studied for steam reforming of biomass tar reaction using in-situ tar in double fixed-bed. Different methods including XRD, N2 adsorption-desorption, SEM, XPS and TG-DTG were employed for characterization of fresh and spent catalysts. The results of low-angle XRD and N2-adsorption-desorption analysis shown that MCM-41 supported was successfully synthesized. In the first-stage fixed-bed, in-situ tar was produced by pyrolysis of rice husk at 450 °C. Simultaneously, the LaNiO3 and XLaNiO3/MCM-41 (X = 0.025, 0.05, 0.075 and 0.1) catalysts were investigated for hydrogen rich syngas production at various reforming temperature (500 °C–900 °C) and steam/carbon mass ratio (S/C = 0.6–1) in second-stage fixed-bed. Among all the catalysts, 0.1LaNiO3/MCM-41 catalyst displayed a higher gas yield of hydrogen (61.9Nm3/kg) at 800 °C and S/C (0.8). At the same conditions after five-time cycles, 0.1LaNiO3/MCM-41 showed a stable hydrogen gas composition of around 50%, and 0.1LaNiO3/MCM-41 catalyst was effective in catalysis of phenol compound in in-situ tar by GC-MS results. TGA-DTG and Raman analysis revealed the carbon deposition was mostly amorphous on 0.1LaNiO3/MCM-41, and lattice oxygen released to remove deposited carbon was the possible reason for 0.1LaNiO3/MCM-41 catalyst’s stable catalytic performance by XPS results.

Keywords: Rice husk biomass; in-situ tar; Catalyst steam reforming; Perovskite; Hydrogen rich syngas (search for similar items in EconPapers)
Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:161:y:2020:i:c:p:408-418

DOI: 10.1016/j.renene.2020.07.089

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