Investigation on the Suitability of Engelhard Titanium Silicate as a Support for Ni-Catalysts in the Methanation Reaction

Abstract

Methanation reaction of carbon dioxide is currently envisaged as a facile solution for the storage and transportation of low-grade energies, contributing at the same time to the mitigation of CO2 emissions. In this work, a nickel catalyst impregnated onto a new support, Engelhard Titanium Silicates (ETS), is proposed, and its catalytic performance was tested toward the CO2 methanation reaction. Two types of ETS material were investigated, ETS-4 and ETS-10, that differ from each other in the titanium content, with Si/Ti around 2 and 3% by weight, respectively. Catalysts, loaded with 5% of nickel, were tested in the CO2 methanation reaction in the temperature range of 300–500 °C and were characterized by XRD, SEM–EDX, N2 adsorption–desorption and H2-TPR. Results showed an interesting catalytic activity of the Ni/ETS catalysts. Particularly, the best catalytic performances are showed by Ni/ETS-10: 68% CO2 conversion and 98% CH4 selectivity at T = 400 °C. The comparison of catalytic performance of Ni/ETS-10 with those obtained by other Ni-zeolites catalysts confirms that Ni/ETS-10 catalyst is a promising one for the CO2 methanation reaction.

Machine Learning in the Development of Adsorbents for Clean Energy Application and Greenhouse Gas Capture

“…[197,198] Corma et al used ML methods to predict synthesis conditions for successful zeolite syntheses, [199] a wellknown greenhouse gas adsorbent. [200,201] They elucidated the relationships between different synthesis parameters with the performance of Ti-silicates using a NN model, and used this to optimize the synthesis of the next generation of materials using a genetic algorithm. Specifically, they found that the catalytic performance of the zeolite was enhanced by decreasing the amount of organic modifier while maintaining the OH/Si ratio of ≈0.2.…”