Rapid production of hydrogen and carbon monoxide via the heterogeneous oxidation of Zn(g)

Luke J. Venstrom, Jane H Davidson

Research output: Contribution to conferencePaperpeer-review

Abstract

The heterogeneous oxidation of Zn(g) is considered as an improved approach to the production of H 2 and CO in the two-step Zn/ZnO solar thermochemical cycle. The rate of Zn(g) oxidation by H 2 O and CO 2 is measured gravimetrically in a quartz tubular flow reactor for temperatures between 800 and 1150 K, Zn(g) concentrations up to 36 mol%, and H 2 O/CO 2 concentrations up to 45 mol%. The rate of the heterogeneous oxidation of Zn(g) by both H 2 O and CO 2 is on the order of 10 -8 -10 -5 mol cm -2 s -1 . For similar oxidizing conditions, H 2 O oxidizes Zn(g) three times as fast as CO 2 , indicative of a lower heterogeneous oxidation activation energy in the H 2 O system. Less than one second is required to convert more than 85% of Zn to ZnO for all temperatures in both the H 2 O and CO 2 reacting systems.

Original languageEnglish (US)
Pages1101-1108
Number of pages8
DOIs
StatePublished - Jan 1 2012
EventASME 2012 6th International Conference on Energy Sustainability, ES 2012, Collocated with the ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology - San Diego, CA, United States
Duration: Jul 23 2012Jul 26 2012

Other

OtherASME 2012 6th International Conference on Energy Sustainability, ES 2012, Collocated with the ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology
CountryUnited States
CitySan Diego, CA
Period7/23/127/26/12

Fingerprint

Dive into the research topics of 'Rapid production of hydrogen and carbon monoxide via the heterogeneous oxidation of Zn(g)'. Together they form a unique fingerprint.

Cite this