Abstract Detail

Abstract

As a result of the significant increase in greenhouse gas emissions, technologies for the capture, utilization and storage of carbon dioxide are being implemented. Carbon dioxide (CO2) methanation has attracted considerable interest among potential carbon utilization strategies due to its ability to generate energy from non-fossil resources by using captured CO2. However, due to the extremely limited kinetics of CO2 methanation, the use of a catalyst is required to achieve the desired reaction efficiency. Due to their high availability and activity, nickel-based catalysts have become increasingly popular in recent years to catalyze the CO2 methanation process. The use of nickel-based catalysts requires a high activation energy of 92 kJ/mol for the reaction to proceed. This study investigated the effect of temperature over Ni-7%Mo/AC in the temperature range of 200 - 450 °C for CH4 production. The catalyst was synthesized using the incipient wetness impregnation method. The findings indicate that the maximum CO2 conversion and CH4 yield were achieved at a temperature of 350 °C with a total GHSV of 12000 h−1, and H2:CO2 ratio of 4:1 under atmospheric pressure. Therefore, the results demonstrate the potential of Ni-7%Mo/AC for CO2 methanation at low temperatures and atmospheric pressure.

Biography

Stephen Okiemute Akpasi is a chemical engineer who received his bachelor's degree from Delta State University in Nigeria. He completed his master's degree at the Durban University of Technology in South Africa, where he focused on the development of adsorbents for carbon capture. He recently completed an ERASMUS exchange program at the University of Valladolid in Spain, where he completed a research stay in the laboratory of the Institute of Sustainable Processes and collaborated on the evaluation of the performance of microbial conversion of CO2 to succinic acid via biogas upgrading. He is currently a PhD student in the Department of Chemical Engineering and Green Engineering Research at the Durban University of Technology. His main research interest is in the synthesis of environmentally friendly materials for catalysis.