title: Alkali Metal CO2Sorbents and the Resulting Metal Carbonates: Potential for Process Intensification of Sorption-Enhanced Steam Reforming.
abstract: Sorption-enhanced steam reforming (SESR) is an energy and cost efficient approach to produce hydrogen with high purity. SESR makes it economically feasible to use a wide range of feedstocks for hydrogen production such as methane, ethanol, and biomass. Selection of catalysts and sorbents plays a vital role in SESR. This article reviews the recent research aimed at process intensification by the integration of catalysis and chemisorption functions into a single material. Alkali metal ceramic powders, including Li2ZrO3, Li4SiO4and Na2ZrO3display characteristics suitable for capturing CO2at low concentrations (<15% CO2) and high temperatures (>500 °C), and thus are applicable to precombustion technologies such as SESR, as well as postcombustion capture of CO2from flue gases. This paper reviews the progress made in improving the operational performance of alkali metal ceramics under conditions that simulate power plant and SESR operation, by adopting new methods of sorbent synthesis and doping with additional elements. The paper also discusses the role of carbonates formed after in situ CO2chemisorption during a steam reforming process in respect of catalysts for tar cracking.
authors.affiliation: School of Environment, Tsinghua University , Beijing, 100084, China.
authors.forename: Muhammad Zaki
authors.identifier: 0000-0002-7108-4868
authors.initials: MZ
authors.lastname: Memon
authors.affiliation: School of Environment, Tsinghua University , Beijing, 100084, China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Zhao
authors.affiliation: School of Environment, Tsinghua University , Beijing, 100084, China.
authors.forename: Vineet Singh
authors.initials: VS
authors.lastname: Sikarwar
authors.affiliation: School of Environment, Tsinghua University , Beijing, 100084, China.
authors.forename: Arun K
authors.initials: AK
authors.lastname: Vuppaladadiyam
authors.affiliation: School of Chemical and Process Engineering (SCAPE), University of Leeds , Leeds LS2 9JT, United Kingdom.
authors.forename: Steven J
authors.initials: SJ
authors.lastname: Milne
authors.affiliation: School of Chemical and Process Engineering (SCAPE), University of Leeds , Leeds LS2 9JT, United Kingdom.
authors.forename: Andy P
authors.initials: AP
authors.lastname: Brown
authors.affiliation: School of Environment, Tsinghua University , Beijing, 100084, China.
authors.forename: Jinhui
authors.initials: J
authors.lastname: Li
authors.affiliation: School of Environment, Tsinghua University , Beijing, 100084, China.|Key Laboratory for Solid Waste Management and Environment Safety, Ministry of Education, Beijing, 100084, China.|Collaborative Innovation Center for Regional Environmental Quality, Tsinghua University , Beijing, China.
authors.forename: Ming
authors.identifier: 0000-0002-5801-5593
authors.initials: M
authors.lastname: Zhao
mesh_terms: D002245:Carbon Dioxide; D002254:Carbonates; D005740:Gases; D006859:Hydrogen; D013227:Steam
chemical_list: D002254:Carbonates; D005740:Gases; D013227:Steam; D002245:Carbon Dioxide; D006859:Hydrogen