Alarcón Avellán, AndreinaPalma, OlatzMantín-Morales, ElenaBiset Peiró, MartíAndreu Arbella, TeresaGuilera Sala, Jordi2024-01-292024-01-292023-02-130016-2361https://hdl.handle.net/2445/206600A 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.11 p.application/pdfengcc-by-nc-nd (c) Alarcón Avellán, Andreina, et al., 2023http://creativecommons.org/licenses/by-nc-nd/4.0/CobaltCatàlisiHidrocarbursCobaltCatalysisHydrocarbonsinfo:eu-repo/semantics/article7322862024-01-29info:eu-repo/semantics/openAccess