Effect of the content of CO2 and H2 in the feed on the conversion of CO2 in the direct synthesis of dimethyl ether over a CuOZnOAl2O3/SAPO-18 catalyst
作者： Ainara Ateka , Javier Ereña , Paula Pérez-Uriarte , Andrés T Aguayo , Javier Bilbao
DOI: 10.1016/J.IJHYDENE.2017.09.104
关键词: Coke 、 Chemistry 、 Methanol 、 Organic chemistry 、 Bifunctional catalyst 、 Catalysis 、 Yield (chemistry) 、 Dimethyl ether 、 Selectivity 、 Syngas 、 Nuclear chemistry
摘要: Abstract The behavior of a CuO ZnO Al2O3/SAPO-18 (CZA/S-18) catalyst on the synthesis dimethyl ether (DME) in single-step has been studied, and effect CO2/COX H2/COX ratios conversion CO2 other reaction indices as COx (CO + CO2), yield selectivity DME, methanol paraffins determined. experiments have carried out fixed bed, high pressure isothermal reactor, under following conditions: 275 °C; 30 bar; space time, 10.18 gcath/molC; CO2/COx ratio, 0–0.5; H2/COx 3 4. deposition coke spent catalysts studied by means temperature programmed oxidation (TPO), quantifying three types coke, considered to be located each function interface between both. results show capacity CZA/S-18 for valorization CO2, attributable activity Al2O3 metallic r-WGS reaction. is enhanced increasing feed. Moreover, augment water content medium when concentration attenuates formation, particularly, fraction deposited acid function.
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