Hydrogenation kinetic of carbon dioxide using microwave induced alloying Mo2C as catalyst

Hainorita Hairon, Abdul Rahim Yacob

Abstract


Due to overwhelming issues on greenhouse effects, there are many approaches to convert the greenhouse gas, carbon dioxide to reduce global warming. Based on this problem, a kinetic study of hydrogenation of carbon dioxide via prepared microwave induced alloying (MIA) molybdenum carbide was conducted. The MIA technique that had been employed supported the “green chemistry” theme. Prepared Mo2C catalyst was characterized using Nitrogen Adsorption Analysis (NAA), X-Ray Diffraction (XRD), and Ammonia-Temperature Desorption (TPD) analysis. The catalyst was used in the hydrogenation of carbon dioxide to carbon monoxide in a modified household microwave oven and the product was characterized by Fourier Transform Infrared Spectroscopy (FTIR). The nitrogen adsorption analysis showed that the surface are of the prepared molybdenum carbide is 76.70m2/g which is higher than the commercial. XRD analysis indicated the peaks that represent the carbides formation. NH3-TPD analysis showed the present of weak, medium, and strong acid site for the prepared molybdenum carbide. In the application of the prepared catalyst, our finding suggested that the minimum starting temperature for the reaction is 350C, which proved the catalyst was indeed effective. The kinetic analysis of the IR spectrum concludes that the order of reaction is second order with the activation energy lower than non-catalytic reaction that is 128.26 kJ/mol.


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References


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