Parametric and Reaction Kinetic Study of Syngas Production from Dry Methane Reforming over Improved Nickel Catalysts

• Published in: Energy & fuels Vol. 35; no. 7; pp. 6179 - 6189
• Main Authors: Karemore, Ashvin L, Sinha, Renu, Chugh, Parivesh, Vaidya, Prakash D
• Format: Journal Article
• Language: English
• Published: American Chemical Society 01.04.2021
• Subjects: Catalysis and Kinetics
• ISSN: 0887-0624; 1520-5029
• DOI: 10.1021/acs.energyfuels.0c04037

Nickelthe preferred reforming catalystwas modified and used for producing syngas from dry methane reforming. This process is attractive because it suitably uses two greenhouse gases: CH4 and CO2. Catalyst Ni/MgO–Al2O3 was prepared by successive impregnation and tested in a fixed-bed reactor between 773 and 1073 K at 0.1 MPa pressure. When the space-time was 0.17 g·h/L and feed was equimolar, 89.4 and 92.9% CH4 and CO2 were converted at 1073 K. As the CO2/CH4 ratio in feed changed from 0.5 to 2 mol/mol, the syngas ratio (H2/CO) decreased from 1.24 to 0.61 mol/mol. Another catalyst, Ni–Pt/Al2O3, was synthesized by coimpregnation, and its performance was tested. It was found that 94.2 and 95.1% CH4 and CO2 from a 1:1 feed mixture were converted at 1073 K and 0.1 MPa pressure and the syngas ratio was 0.9 mol/mol. Both catalysts were characterized using SEM, XRD, TGA–DSC, and TPR/TPD methods. The effects of reaction parameters on performance were studied, and catalysts were found durable for up to 30 h. Between 873 and 973 K, kinetic data were obtained in a differential reactor and models based on power-law and Langmuir–Hinshelwood kinetics were suggested. This parametric and kinetic study gave insight into the performance of modified Ni catalysts in dry methane reforming.