Development of CaO promoted Ni/Al2O3 catalyst for direct methanation of biogas into biomethane

Name: Jidapa Tatiyapantarak

Organization : Mahidol University. Faculty of Engineering

Name: Atthapon Srifa

Organization : Mahidol University. Faculty of Engineering

Name: Wanida Koo-Amornpattana

Organization : Mahidol University. Faculty of Engineering

Name: Choji Fukuhara

Organization : Shizuoka University. Graduate School of Engineering

Name: Sakhon Ratchahat

Organization : Mahidol University. Faculty of Engineering

Email : sakhon.rat@mahidol.edu

keyword: Biomethane

LCSH: Nickel catalysts

LCSH: Aluminum oxide

LCSH: Renewable energy

Abstract: The direct methanation of biogas to biomethane was performed via a CO2 methanation reaction over Ni-based catalysts. The catalysts were prepared by a simple impregnation method. The catalytic enhancement of as-prepared catalysts in terms of CO2 conversion and CH4 yield was investigated in a fixed-bed reactor at 200-500°C, and atmospheric pressure. The CaO loading on Al2O3 support (10, 20, and 30 wt.%) was studied, while the Ni loading of 10 wt.% was fixed. The 10% Ni/(10% CaO)-Al2O3 catalyst exhibited the highest CO2 conversion of 80.1% and CH4 yield of 79.7% at 325°C. The nickel loading (10, 20, 30, and 40 wt.%) was optimized using the 10 wt.% CaO-Al2O3 support. The 30 wt.% Ni provided the highest CO2 conversion of 86.3% and CH4 yield of 86.2% at temperature of 275 °C. The sequence for loading Ni and CaO on Al2O3 was studied by using the 30% Ni/(10% CaO)-Al2O3 catalyst. It found that the loading sequence had a significant effect on the catalytic activity, especially at 225°C, the CO2 conversions were 13.2% to 76.2% for sequentialimpregnation method and co-impregnation method, respectively. The various characterization techniques were performed, and results revealed that the promotion of CO2 adsorption and H2 dissociation active sites is necessary to carry out CO2 methanation

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Created: 2024

Modified: 2024-11-27

Issued: 2024-11-27

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BibliograpyCitation : In Kasetsart University. Faculty of Science. The Pure and Applied Chemistry International Conference 2024 (PACCON 2024) (pp.219-225). Bangkok : Kasetsart University, 2024

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