title: Effect of SO2and steam on CO2capture performance of biomass-templated calcium aluminate pellets.
abstract: Four types of synthetic sorbents were developed for high-temperature post-combustion calcium looping CO2capture using Longcal limestone. Pellets were prepared with: lime and cement (LC); lime and flour (LF); lime, cement and flour (LCF); and lime, cement and flour doped with seawater (LCFSW). Flour was used as a templating material. All samples underwent 20 cycles in a TGA under two different calcination conditions. Moreover, the prepared sorbents were tested for 10 carbonation/calcination cycles in a 68 mm-internal-diameter bubbling fluidized bed (BFB) in three environments: with no sulphur and no steam; in the presence of sulphur; and with steam. When compared to limestone, all the synthetic sorbents exhibited enhanced CO2capture performance in the BFB experiments, with the exception of the sample doped with seawater. In the BFB tests, the addition of cement binder during the pelletisation process resulted in the increase of CO2capture capacity from 0.08 g CO2per g sorbent (LF) to 0.15 g CO2per g sorbent (LCF) by the 10thcycle. The CO2uptake in the presence of SO2dramatically declined by the 10thcycle; for example, from 0.22 g CO2per g sorbent to 0.05 g CO2per g sorbent in the case of the untemplated material (LC). However, as expected all samples showed improved performance in the presence of steam, and the decay of reactivity during the cycles was less pronounced. Nevertheless, in the BFB environment, the templated pellets showed poorer CO2capture performance. This is presumably because of material loss due to attrition under the FB conditions. By contrast, the templated materials performed better than untemplated materials under TGA conditions. This indicates that the reduction of attrition is critical when employing templated materials in realistic systems with FB reactors.
authors.affiliation: Combustion and CCS Centre, Cranfield University, Bedford, Bedfordshire MK43 0AL, UK. m.eransmoreno@cranfield.ac.uk.
authors.forename: María
authors.initials: M
authors.lastname: Erans
authors.affiliation: IFK, University of Stuttgart, Pfaffenwaldring 23, Stuttgart, D-70569, Germany.
authors.forename: Theodor
authors.initials: T
authors.lastname: Beisheim
authors.affiliation: Combustion and CCS Centre, Cranfield University, Bedford, Bedfordshire MK43 0AL, UK. m.eransmoreno@cranfield.ac.uk.
authors.forename: Vasilije
authors.initials: V
authors.lastname: Manovic
authors.affiliation: Combustion and CCS Centre, Cranfield University, Bedford, Bedfordshire MK43 0AL, UK. m.eransmoreno@cranfield.ac.uk.
authors.forename: Michal
authors.initials: M
authors.lastname: Jeremias
authors.affiliation: Combustion and CCS Centre, Cranfield University, Bedford, Bedfordshire MK43 0AL, UK. m.eransmoreno@cranfield.ac.uk.
authors.forename: Kumar
authors.initials: K
authors.lastname: Patchigolla
authors.affiliation: IFK, University of Stuttgart, Pfaffenwaldring 23, Stuttgart, D-70569, Germany.
authors.forename: Heiko
authors.initials: H
authors.lastname: Dieter
authors.affiliation: Combustion and CCS Centre, Cranfield University, Bedford, Bedfordshire MK43 0AL, UK. m.eransmoreno@cranfield.ac.uk.
authors.forename: Lunbo
authors.initials: L
authors.lastname: Duan
authors.affiliation: Combustion and CCS Centre, Cranfield University, Bedford, Bedfordshire MK43 0AL, UK. m.eransmoreno@cranfield.ac.uk.
authors.forename: Edward J
authors.initials: EJ
authors.lastname: Anthony