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2023-02-13

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cc-by-nc-nd (c) Alarcón Avellán, Andreina, et al., 2023
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/206600

Bimetallic cobalt catalysts promoted by La2O3 for the production of high-calorie synthetic gas

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https://doi.org/10.1016/j.fuel.2023.127726

Abstract

A new catalytic route for the production of a high-calorie synthetic gas (40-60 MJ/Nm3), composed by C1-C4 hydrocarbons, has industrial interest for gas applications and locations with high heating requirements. In this work, a series of bimetallic Co-X (X = Ni, Pt and Fe) catalysts supported on La2O3 promoted Al2O3 micro-spheres were evaluated using both CO2 and CO carbon sources under mild temperature (T = 200-300 °C), moderate pressure (P = 10 bar·g) and relatively high gas hourly space velocity (40,000 N mL/gcat·h). Experimental results proved that the incorporation of nickel as a second metal is beneficial for high-calorie gas application. Besides, catalytic results showed that the utilization of CO as carbon source is beneficial in both conversion and C1-C4 hydrocarbon selectivities. Co-Ni presented the most interesting results, leading to a heating value of 57.9 MJ/Nm3 (40.01 % CH4 and 50.04 % C2-C4 hydrocarbon) at 250 °C through CO hydrogenation. The enhanced catalytic performance achieved over bimetallic Co-Ni was attributed to CoNi alloy catalytic activity, high reducibility (73.82 %), active metal content (9.65x10-4 mmol/g) and appropriate acid-basic sites for COx activation. In contrast, the conversion of CO2 to high-calorie gas was found to be more challenging and lower gas heating values were achieved (39.73 MJ/Nm3). In this case, an adapted reactor concept using a dual bimetallic catalyst and different reaction conditions is hereby proposed to shift selectivity towards the targeted products. This findings represent a step forwards in catalytic engineering for the development of high-calorie synthetic gas reactors.

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Cobalt, Catàlisi, Hidrocarburs

Subject (English)

Cobalt, Catalysis, Hydrocarbons

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Articles publicats en revistes (Ciència dels Materials i Química Física)

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ALARCÓN AVELLÁN, Andreina, et al. Bimetallic cobalt catalysts promoted by La2O3 for the production of high-calorie synthetic gas. Fuel. 2023. Vol. 341, num. 1-11. ISSN 0016-2361. [consulted: 14 of August of 2026]. Available at: https://hdl.handle.net/2445/206600

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