Chemical looping syngas from <script type="math/tex">CO_{2}</script> and <script type="math/tex">H_{2}O</script> over manganese oxide minerals

Perreault, Patrice; Patience, Gregory S.

doi:10.1002/CJCE.22432

Title

Chemical looping syngas from $CO_{2}$ and $H_{2}O$ over manganese oxide minerals

Author

Perreault, Patrice

Patience, Gregory S.

Abstract

Rather than sequestering carbon dioxide from the exhaust of chemical looping combustion reactors, together with the water, it could be usedas a source of syngas. For the first time, we split water to hydrogen and carbon dioxide to carbon monoxide with a manganese ore. SpecificCO production is 10–100 times higher than Sr, Ce, and Fe doped perovskites and Y0.5Sr0.5MnO3perovskites. At a contact time of 0.01 sand at temperatures ranging from 810–960◦C the maximum specific CO production was 5.5 mol·kg−1. A combined kinetic-axial dispersionhydrodynamic model accounts for 97 % of the variance in the data assuming the reaction rate is first-order in CO2and surface reduced sites andin equilibrium with the reverse reaction—a first-order reaction in CO with surface oxidized sites. A second reaction accounts for the diffusion ofsurface oxygen to the bulk lattice. Hydrogen productivity peaked at 4.8 mol·kg−1at 947◦C, which is twice as high as reported in previous studieson CoFe2O4and Al2O3in the hercynite cycle.

Language

English

Source (journal)

The Canadian journal of chemical engineering. - Ottawa, Ont., 1957, currens

Publication

Ottawa, Ont. : 2016

ISSN

0008-4034 [print]

1939-019X [online]

DOI

10.1002/CJCE.22432

Volume/pages