Oxidative Dry Reforming of Methane to Syngas on a Ni/Al2O3 Catalyst
- Type: Conference Presentation
- Conference Type: AIChE Annual Meeting
- Presentation Date: November 19, 2020
- Duration: 10 minutes
- Skill Level: Intermediate
- PDHs: 0.20
In order to develop an industrially viable catalyst for dry reforming of methane (DRM), an Al2O3 supported Ni catalyst was prepared by the incipient wet impregnation method. Unfortunately, catalyst deactivation was pronounced in such non-noble metal catalysts due to coking and sintering. As the active metal interaction with the underlying support is pivotal in catalyst performance, the Ni/Al2O3 catalyst was calcined at 850°C. The resulting H2-TPR profile suggested a strong metal-support interaction since a reduction peak maxima was observed at 752°C. The catalyst was also characterized by UV-vis, XRD, surface area and H2-chemisorption. The DRM reaction was performed in a packed bed tubular reactor with a molar feed composition of CH4:CO2:N2 = 1:1:1. Partial oxidation of methane (POM) was also investigated for syngas production. The molar feed composition was kept as CH4:O2:N2 = 1:x:2-x, where x was 0.08, 0.15, or 0.225. The spent catalysts were qualitatively and quantitatively characterized by FESEM, XPS and CHNO analysis. A comparative study of the activity test suggested that Ni/Al2O3 performed better for DRM compared to POM, and lower coking was observed. To obtain an even better performance, the DRM was coupled with POM, such that the ratio of the reactants was CH4:CO2:O2:N2 = 1:1:x:1-x. The combined DRM and POM reaction resulted in an energetically efficient oxidative dry reforming of methane (ODRM) reaction with minimal carbon formation. Thus, ODRM emerged as an efficient syngas production route with amplified catalyst activity and with minimal formation of carbon-whiskers for x = 0.225.
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