Heterogeneously‐Catalyzed Hydrogenation of Carbon Dioxide to Methane using RuNi Bimetallic Catalysts. Issue 1 (12th November 2014)

• Record Type: Journal Article
• Authors: Lange, Felix; Armbruster, Udo; Martin, Andreas
• Is Part Of: Energy technology. Volume 3:Issue 1(2015:Jan.)
• Page Start: 55
• Page End: 62
• Publication Date: 2014-11-12
• Subjects: Energy development -- Periodicals; Power resources -- Periodicals; 333.79
• DOI: 10.1002/ente.201402113
• Languages: English
• ISSNs: 2194-4288

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>One facet of the future energy supply can be covered by the use of synthetic natural gas (SNG) obtained from carbon dioxide and hydrogen using excess solar or wind energy to power water electrolysis. In this article, zirconia supported RuNi bimetallic catalysts were evaluated for this reaction at 300–400 °C, 10 bar, and space velocities up to 36 000 h⁻¹. In general, the reaction is close to the equilibrium; CO₂ conversion is complete, and SNG selectivity is close to 100 %. The studies have shown that Ru can be partially substituted by Ni to achieve similar product performance. Bimetallic catalysts with low loadings show the formation of alloys but higher loadings lead to segregation and agglomeration of Ni particles. The SNG productivity (at 36 000 h⁻¹) reached on the best catalysts approximately 70 kg kg_Ru⁻¹ h⁻¹ and 40 kg kg_Ni⁻¹ h⁻¹, respectively. Thus, a SNG space‐time‐yield of approximately 50–100 kg kg_metal⁻¹ h⁻¹ (70–140 N m³ h⁻¹) can be obtained to this point.</p> </abstract>