Work

Effect of blending hydrogen into natural gas on selective catalytic reduction of NOx for stationary power applications using a V2O5-WO3/TiO2 catalyst

Year: 2025

Type: article

Abstract: This study investigates the impact of hydrogen blending into natural gas on the selective catalytic reduction (SCR) of NO x in stationary power applications using a V 2 O 5 –WO 3 /TiO 2 -based commercial SCR catalyst. Results indicate that blending hydrogen up to 100 % does not inhibit NO x conversion, even at high water vapor concentrations (up to 34 %) resulting from hydrogen combustion, and an increase in NO x conversion is observed with hydrogen addition. Lean combustion conditions enhance NO x conversion due to excess oxygen. While increasing SO 2 concentration (up to 500 ppm) reduces SCR activity, 100 % hydrogen cases exhibit higher NO x conversion, showing improved sulfur tolerance due to high water content favoring the formation of surface sulfate species rather than sulfites, enhancing catalyst acidity. These findings demonstrate that SCR units can effectively operate without modification when transitioning to hydrogen–natural gas blends, offering a promising route for decarbonizing stationary power systems without compromising NO x control performance.

Source: International Journal of Hydrogen Energy

DOI: 10.1016/j.ijhydene.2025.152223

Authors: Sahand Faraji, Kyle Horiuchi, Sogand Aghamohammadi, Bihter Padak

Institution: University of California, Irvine

Language: English

Topic: Catalytic Processes in Materials Science

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

SDGs: Affordable and clean energy, Climate action, Industry, innovation and infrastructure

Open Access status: hybrid

Estimated APC paid: $3,730