High rates of catalytic hydrogen combustion with air over coated cordierite monolith

Mukri, Bhaskar Devu and Hegde, M S (2017) High rates of catalytic hydrogen combustion with air over coated cordierite monolith. In: JOURNAL OF CHEMICAL SCIENCES, 129 (9). pp. 1363-1372.

PDF Jou_Che_Sci_129-9_1363_2017.pdf - Published Version Restricted to Registered users only Download (1MB) | Request a copy

Abstract

was coated on -coated honeycomb structured cordierite monolith (AHCM) by solution combustion method using dip-dry-heat process. This is a modified conventional method to coat the catalysts on honeycomb structured cordierite monolith (HCM). Formation of on AHCM was confirmed by XRD. The XPS spectra of Pd(3d) core level confirmed Pd ion in is in the form of +2 state. The surface morphology of coated catalyst was unchanged by long time exposure to hydrogen combustion reaction; i.e., recombination reaction which indicated the stability of coating on monolith. showed high rates of recombination compared to 2 atom% Pd(metal)/, , , , and . The activation energy of recombination reaction over is 7.8 kcal/mol. The rates of reaction over at 60 are in the range between 10 and 20 . The rate of reaction over increased with increase in the concentration of . For 50 mL of , it showed rates of the reaction around 36.45 at room temperature and 230 at 60. It was found that the rate of reaction due was lower due to hindering effect by adsorption of other gas molecules on the catalytic site. Finally, we propose a mechanism of hydrogen and oxygen recombination reaction over Ti0.97Pd0.03O2-delta. catalysts were coated by solution combustion method on coated honeycomb structured cordierite monolith. Among the catalysts, coated monolith showed high catalytic activity for hydrogen combustion with air. The proposed mechanism of reaction clarified that ion state is unaltered in lattice.

Item Type:	Journal Article
Publication:	JOURNAL OF CHEMICAL SCIENCES
Additional Information:	Copy right for this article belongs to the INDIAN ACAD SCIENCES, C V RAMAN AVENUE, SADASHIVANAGAR, P B #8005, BANGALORE 560 080, INDIA
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	07 Oct 2017 06:07
Last Modified:	07 Oct 2017 06:07
URI:	http://eprints.iisc.ac.in/id/eprint/57984

Actions (login required)

View Item