Thermodynamic Analysis of the Effect of Green Hydrogen Addition to a Fuel Mixture on the Steam Methane Reforming Process

Robert Kaczmarczyk
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Robert Kaczmarczyk: Department of Fundamental Research in Energy Engineering, Faculty of Energy and Fuels, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Krakow, Poland

Energies, 2021, vol. 14, issue 20, 1-14

Abstract: Steam methane (CH 4 –H 2 O) reforming in the presence of a catalyst, usually nickel, is the most common technology for generating synthesis gas as a feedstock in chemical synthesis and a source of pure H 2 and CO. What is essential from the perspective of further gas use is the parameter describing a ratio of equilibrium concentration of hydrogen to carbon monoxide ( H / C = x H 2 / x C O ) . The parameter is determined by operating temperature and the initial ratio of steam concentration to methane S C = x H 2 O 0 / x C H 4 0 . In this paper, the author presents a thermodynamic analysis of the effect of green hydrogen addition to a fuel mixture on the steam methane reforming process of gaseous phase (CH 4 /H 2 )–H 2 O. The thermodynamic analysis of conversion of hydrogen-enriched methane (CH 4 /H 2 )–H 2 O has been performed using parametric equation formalism, allowing for determining the equilibrium composition of the process in progress. A thermodynamic condition of carbon precipitation in methane reforming (CH 4 /H 2 ) with the gaseous phase of H 2 O has been interpreted. The ranges of substrate concentrations creating carbon deposition for temperature T = 1000 K have been determined, based on the technologies used. The results obtained can serve as a model basis for describing the properties of steam reforming of methane and hydrogen mixture (CH 4 /H 2 )–H 2 O.

Keywords: steam reforming of methane; green hydrogen; parametric equation formalism; equilibrium characteristics; carbon deposition (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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