Novel CaO-SiO2 sorbent and bifunctional Ni/Co-CaO/SiO2 complex for selective H-2 synthesis from cellulose

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dc.contributor.authorZhao, MWen_AU
dc.contributor.authorYang, XSen_AU
dc.contributor.authorChurch, TLen_AU
dc.contributor.authorHarris, ATen_AU
dc.date.accessioned2014-04-24T01:06:16Zen_AU
dc.date.available2014-04-24T01:06:16Zen_AU
dc.date.issued2012-01-17en_AU
dc.date.statistics2014-04-24en_AU
dc.description.abstractCatalysis- and sorption-enhanced biomass gasification is a promising route to high-purity hydrogen (H-2); however, most CaO-based sorbents for CO2 capture have poor surface area and mechanical properties, lose carrying capacity over multiple uses, and have insufficient porosity to accommodate extra catalyst sites. We aimed to develop a high-surface-area CaO-SiO2 framework onto which catalysts could be grafted. The best CaO-SiO2 sorbent (n(Ca)/n(Si) = 2:1) maintained a Cao conversion of 65% even after 50 carbonation-decarbonation cycles, better than commercial micrometer-sized CaO or tailored CaO, because of stabilization via Ca-O-Si interactions and an ordered porous structure. Bimetallic catalyst grains (Ni/Co alloy, <20 nm) could be evenly loaded onto this structure by impregnation. The resulting bifunctional complex produced H-2 at nearly the same rate as a mixture of catalyst and commercial CaO while using less total sorbent/catalyst. Furthermore, this complex was much more durable due to its higher coking resistance and stable structure. After 25 carbonation decarbonation cycles, the new catalyst sorbent complex enhanced the H-2 yield from cellulose far more than a mixture of catalyst and commercial CaO did following the same treatment. © 2012, American Chemical Society.en_AU
dc.identifier.citationZhao, M., Yang, X. S., Church, T. L., & Harris, A. T. (2012). Novel CaO-SiO2 sorbent and bifunctional Ni/Co-CaO/SiO2 complex for selective H-2 synthesis from cellulose. Environmental Science & Technology, 46(5), 2976-2983. doi:10.1021/es300135den_AU
dc.identifier.govdoc4562en_AU
dc.identifier.issn0013-936Xen_AU
dc.identifier.issue5en_AU
dc.identifier.journaltitleEnvironmental Science & Technologyen_AU
dc.identifier.pagination2976-2983en_AU
dc.identifier.urihttp://dx.doi.org/10.1021/es300135den_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/5478en_AU
dc.identifier.volume46en_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectHydrogenen_AU
dc.subjectPorosityen_AU
dc.subjectCatalysisen_AU
dc.subjectGasificationen_AU
dc.subjectMixturesen_AU
dc.subjectCelluloseen_AU
dc.subjectPyrolysisen_AU
dc.subjectCalciumen_AU
dc.subjectOxidesen_AU
dc.subjectSurface areaen_AU
dc.titleNovel CaO-SiO2 sorbent and bifunctional Ni/Co-CaO/SiO2 complex for selective H-2 synthesis from celluloseen_AU
dc.typeJournal Articleen_AU
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