Catalytic steam reforming of in-situ tar from rice husk over MCM-41 supported LaNiO3 to produce hydrogen rich syngas. (December 2020)

• Record Type: Journal Article
• Authors: Liu, Chenlong; Chen, Dong; Cao, Yongan; zhang, Tianxi; Mao, Yangyang; Wang, Wenju; Wang, Zhigang; Kawi, Sibudjing
• Is Part Of: Renewable energy. Volume 161(2020)
• Page Start: 408
• Page End: 418
• Publication Date: 2020-12
• Subjects: Rice husk biomass -- in-situ tar -- Catalyst steam reforming -- Perovskite -- Hydrogen rich syngas; Renewable energy sources -- Periodicals; Power resources -- Periodicals; Énergies renouvelables -- Périodiques; Ressources énergétiques -- Périodiques; 333.794
• DOI: 10.1016/j.renene.2020.07.089
• Languages: English
• ISSNs: 0960-1481

Abstract

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 (61.9Nm 3 /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. Highlights: The catalyst activity of LaNiO3 was enhanced by supporting MCM-41. The LaNiO3 /MCM-41 show catalyst activity about gas composition and liquid after five-time cycles. The lattice oxygen of LaNiO3 /MCM-41 could eliminate carbon deposition on catalyst surface.