Storage and in-situ preparation of H2-mixed CH4 fuel by thermochemical reduction of inorganic carbonates with activated metal hydrides

Alkaline Earth Metal-Induced Hydrogenation of the CaO-Captured CO2 to Methane at Room Temperature

“…CaH 2 can provide a highly active lattice H – , which can combine with the C atom of the produced CaCO 3 to form a transition state with the formate structure, which is consistent with the proposed CO 2 methanation mechanism. , Then, the transition state is further decomposed or transformed, producing amorphous elemental carbon, which can further react with H 2 to form CH 4 . Our previous works have proved that the in situ formed amorphous carbon can react with H 2 to produce CH 4 …”

“…With regard to the reaction of carbonate with metal hydride, Grasso et al reported that the CH 4 /H 2 fuel mixture was obtained by catalyst-free reaction between Li 2 CO 3 and MgH 2 . Our group has recently investigated the mechanochemical reactions between metal hydrides and metal carbonates and found that the highest CH 4 production rate was 89% and the CH 4 selectivity was near 100% . Chen et al reported that a CH 4 selectivity of 88.4% and a CO 2 conversion of 27.1% were achieved in the process of the MgH 2 -catalyzed hydrogenation of CO 2 .…”

Selective Conversion of the CaO-Captured CO2 to CH4 by Ni- and Hydrogen-Assisted Calcium Looping Processes in a Batch Reactor

“…33 mixed methane could be obtained by thermochemical reduction of inorganic carbonates with the activated metal hydrides. 34 37 On the basis of these literatures, it is inferred that the decarbonation temperature of CaCO 3 may be drastically lowered under a hydrogen atmosphere in the presence of a transition-metal catalyst, which can be utilized to achieve an energy-saving CaL process.…”

“…Recently, there has been interest in the catalytic hydrogenation of carbonates to hydrocarbons. − According to the research by Rao et al, carbonate can be transformed into CH 4 at 823 K in the presence of the catalyst Co/CoO/CaO . They also reported that CaCO 3 could be hydrogenated to create C 1 –C 3 hydrocarbons in the temperature range of 573–873 K under atmospheric pressure using the catalysis of iron catalyst .…”

“…They also reported that CaCO 3 could be hydrogenated to create C 1 –C 3 hydrocarbons in the temperature range of 573–873 K under atmospheric pressure using the catalysis of iron catalyst . Teng et al discovered that CO x -free hydrogen-mixed methane could be obtained by thermochemical reduction of inorganic carbonates with the activated metal hydrides . Gennari et al reported that CH 4 /H 2 fuel mixtures were generated at room temperature without catalysts using Li 2 CO 3 as the CO 2 source and MgH 2 as the H 2 source .…”