Optimization of CO2 methanation process using Ni-Fe/Al2O3 catalyst at low temperatures

  • Yurika Dewi Safitri Liza Department of Chemical Engineering, State Polytechnic of Sriwijaya, Palembang, Indonesia
  • Fadarina H C Department of Chemical Engineering, State Polytechnic of Sriwijaya, Palembang, Indonesia
  • Anerasari Mediniariasty Department of Chemical Engineering, State Polytechnic of Sriwijaya, Palembang, Indonesia
  • Robert Junaidi Department of Chemical Engineering, State Polytechnic of Sriwijaya, Palembang, Indonesia
Keywords: Carbon Dioxide, Methanation, Methane, Ni-Fe/Al2O3

Abstract

Carbon dioxide is one of the main contributors to the greenhouse effect. Based on IEA data, energy-related carbon dioxide emissions will increase by 6% in 2021 to 36.3 billion tonnes. Methanation of carbon dioxide, known as the Sabatier reaction, is an exothermic reaction in which hydrogen and carbon dioxide react to form methane and water as by-products. Methane is a colorless, odorless, non-toxic flammable dangerous gas. Nickel, Rhodium, and Ruthenium catalysts are some of the most widely used active catalytic constituents in CO2 methanation. Al2O3, SiO2, CeO2, ZrO2, TiO2, Nb2O5, and catalyst combinations from other constituents have been widely proposed and investigated as catalyst supports. This study used a nickel catalyst with a combination of Al2O3 as a support and Fe as a promoter. Nickel catalyst was chosen because it can absorb hydrogen, is cheap, and is very selective in methane formation. This research was conducted in situ by reacting 1 g of Ni catalyst powder; 2gr; 3gr, Al powder as much as 1gr; 2gr; 3gr; Fe powder as much as 1gr; 2gr with 1 M NaOH solution, which was heated while stirring at 100 rpm for 60 minutes. The highest methane gas yield was obtained in sample 10 with a mass of Ni, Al, and Fe, respectively 3 gr, 1 gr, and 2 gr of 10.07% with a CO2 conversion of 2.70%. The more mass of Ni and Fe catalysts used, the higher the temperature and the more CH4 produced.

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Published
2024-07-24