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Stable catalyst design for the activation of methane to syngas, hydrogen, and chemicals


    Problem Statement

    Methane and light alkanes are species with relatively poor economic interest. Our goal is to activate C–H σ-bond to produce hydrogen, olefins, carbon monoxide, and carbon nanofibers, following different process strategies such as oxidative coupling (for olefins), CO2 dry reforming (for syngas), cracking or catalytic decomposition (for hydrogen-free of COx and sequestrated carbon nanotubes/nanofibers), cracking/co-cracking with CO or methanol. We work on developing, synthesizing, characterizing, and testing innovative catalysts with a twist of reaction engineering concepts, with a focus on multi-scale implications.

    We delve into the mechanistic insights into a series of in-house-synthesized metal-supported heterogeneous catalysts by combining them with dynamic reactors and ab initio calculations. We explore catalysts with extended lifetimes, enhanced activity, selectivity, and heat transfer. These catalysts are based on alloys-intermetallics, high entropy alloys, exsolved perovskites, and SiC, among others.

    We investigate novel reactor designs based on forced-dynamic, operando, and fluidized-bed reactors to amplify kinetic information and improve selectivity.

    CHA2023

    Goals

    • Develop a microkinetic-based modeling framework to analyze the catalyst performance
    • Scale the technical catalyst for its application in demanding exothermic (oxidative coupling of methane using SiC and spray drying) or fluidized-bed (catalytic decomposition of methane) conditions
    • Develop new catalytic concepts based on Ni-alloys (Ni-Fe, -Co, -Zn…)
    • Improve the catalyst structure-function correlations using in-situ, operando, and dynamic techniques and reactors

    Related People

    Related Publications

    Effect of Cofeeding Butane with Methanol on the Deactivation by Coke of a HZSM-5 Zeolite Catalyst

    by Aguayo, Castaño, Mier, Gayubo, Olazar, Bilbao
    Ind. Eng. Chem. Res. Year: 2011

    Abstract

    The deactivation by coke of a HZSM-5 zeolite catalyst has been studied in the transformation of methanol into hydrocarbons by cofeeding butane (n-butane). This reaction is of interest as an energy-neutral integrated process that enhances the activity in the cracking reaction and upgrades the paraffins formed as byproducts. The process was carried out in a fixed-bed reactor under the following conditions: temperature, 550 °C; pressure, 1 bar; space time, 2.4 and 4.8 (g of catalyst) h (mol of CH2)−1; time on stream, 5 h; methanol/butane molar ratio, up to 16/1. The coke was characterized using several analytical techniques (TG–TPO, FTIR, Raman, and NMR spectroscopies), and the effects of cofeeding butane on the coke composition and structure were determined. The results in terms of coke content and composition, are explained in terms of the different pathways of methanol and butane transformation.

    Keywords

    O2H CHA