%0 Journal Article
%A Wang, Xinhe
%A Du, Xuancheng
%A Yu, Wenbo
%A Zhang, Junshe
%A Wei, Jinjia
%D 2019
%T Coproduction of Hydrogen and Methanol from Methane
by Chemical Looping Reforming
%U https://acs.figshare.com/articles/journal_contribution/Coproduction_of_Hydrogen_and_Methanol_from_Methane_by_Chemical_Looping_Reforming/8248403
%R 10.1021/acs.iecr.9b01695.s001
%2 https://acs.figshare.com/ndownloader/files/15379286
%K chemical looping reactor
%K ratio
%K solar-driven coproduction scheme
%K water splitting step
%K CaO
%K SrFeO
%K fuel production
%K selectivity
%K oxygen transfer agent
%K chemical looping technology
%K redox
%K CO
%K Chemical Looping Reforming Coproduction
%K oxide
%K solar-driven chemical looping
%K performance
%K H 2 conversion
%K methanol synthesis
%X Coproduction
of hydrogen and methanol from methane by chemical
looping reforming is a novel approach to transform natural gas. Compared
with conventional reforming processes, the mole ratio of methane to
water fed to a chemical looping reactor can be the stoichiometric
ratio without concerns over coking. In this work, the redox scheme
was experimentally and numerically investigated, where a SrFeO3−δ perovskite acted as the oxygen transfer agent.
To improve its redox performance, SrFeO3−δ was dispersed into three oxides: CaO, MnO, and CaO·MnO. Among
them, CaO·MnO enhances the reforming performance best. Specifically,
SrFeO3−δ/CaO·MnO composites exhibit 6.9%
coke selectivity, 66.2% maximum instantaneous methane conversion,
and 91.5% syngas (H2/CO ≈ 2) selectivity in the
methane partial oxidation step and up to 90% H2O to H2 conversion in the water splitting step at a redox temperature
of 900 °C. Further studies suggest that the low coke selectivity
stems from the reaction between manganese oxide and coke or its precursor,
which becomes more favorable at high temperatures. To evaluate the
process of solar fuel production by chemical looping technology, an
economic analysis of the coproduction of the hydrogen and methanol
process was carried out and compared with conventional methanol synthesis.
Compared with thermally driven methanol synthesis, the solar-driven
coproduction scheme demonstrates 14% exergy efficiency improvement,
63% CO2 emission reduction, and 1.9 times more net income
than the former. Our findings demonstrate that solar-driven chemical
looping reforming is a very promising option for solar fuel production.
%I ACS Publications