(730i) Selective Conversion of CO2 to CO at Low Temperatures Using Cu and Ni Catalysts Prepared By Combustion Synthesis Technique
- Conference: AIChE Annual Meeting
- Year: 2021
- Proceeding: 2021 Annual Meeting
- Group: Sustainable Engineering Forum
- Time: Wednesday, November 17, 2021 - 2:20pm-2:35pm
Utilization of fossil fuels accounts for a large portion of the total energy required resulting in an exponential growth in CO2 emission into the atmosphere. In this regard, the Carbon Capture and Utilization (CCU) strategy, a catalytic conversion of CO2 into CO through reverse water gas shift (RWGS) reaction can be considered an attractive approach to CO2 valorization. Herein, we investigate Cu and Ni-based catalysts prepared by the combustion synthesis method for RWGS reaction. The CO2 thermal hydrogenation reaction was carried out successfully using a tubular flow reactor in the temperature range of 100 to 600 oC with a CO2/H2 ratio of 1 to 4. The catalysts showed ~70% conversion at 600 oC stable for 17h [1,2]. The copper catalysts show exceptional selectivity for CO, even at low temperature, whereas addition of nickel results in better activity with a slight trade off in CO selectivity to CH4. We also employed electrocatalytic routes to convert CO2 on Cu, Ni electrocatalysts to understand the reaction pathway [3-6]. The catalysts (both fresh and used ones) were characterized by different techniques such as: XRD, TPR and SEM/EDX, TEM, and Raman; to study the morphological properties as well as the impact of reaction exposure on the catalysts.
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