الفهرس 
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Abstract
Synthetic natural gas (SNG) has attracted significant attention over the past years due to its critical role in the future energy mix where it can be produced from multiple sources, including coal, wastes & biomass. In addition to having huge infrastructure already in place for transportation and utilization. Carbon monoxide (CO) methanation is considered one of the major SNG production routes. Nickel oxide catalyst supported on silica extracted from risk husk was prepared using wet impregnation method and characterized using different techniques including XRD, N2 Adsorption, SEM-EDS, XRF & TPR. The catalyst performance in progressing CO Methantion reaction was tested in a bubbling fluidized bed continuous flow reactor system. Catalytic experiments were conducted at H2:CO ratio of 3:1 at atmospheric pressure, in the temperature range between 200-450oC and at different fluidization velocities varying from 2 times to four times the minimum fluidization velocity (Umf). CO conversion, CH4 selectivity & CO2 selectivity were calculated for all runs. Based on the assessment of catalytic runs, fluidized bed reactor system proved to be efficient in ensuring adequate temperature control and uniformity for CO methanation. Optimal results of 97% CO conversion, 81% CH4 selectivity and 21% CO2 selectivity were achieved at operating conditions of temperature of 350oC, pressure of 1 bara & superficial velocity of 2 Umf.