Catalytic hydrogenation of carbonate minerals:A promising pathway to carbon neutrality for industries with intensive carbon emissions
Intensive carbon emissions and energy consumptions are the technical bottleneck for sustainable developments of traditional industries,such as the cement,steel and metallurgy,which are mainly caused by the thermal decomposition of various carbonate minerals.The technology of hydrogen-driven carbonate catalytic reduction integrates metal oxide production and high-value-added conversion of carbon resources processes to overturn the inevitable CO2 emission in conventional thermal decomposition pathway.In this process,the resource of hydrogen can be widely referred to various hydrogen donors(e.g.,H2,alkane or other substances containing hydrogen),and the high-value-added products can be C1-products or C2+hydrocarbon,thus significantly reducing the overall costs of the reduction of carbon emissions.Furthermore,the novel technology was expected to provide technical supports for the goal of carbon neutrality in intensive-carbon-emission industrial sectors using carbonate minerals as raw materials.This review presented the developments and progresses of the carbonate hydrogenation technology.Along with the clue of various value-added products,the characteristics of processes,reaction mechanisms,catalysts design and the key bottlenecks of the technologies were introduced,respectively.Based on the analysis of state-of-the-art works of catalytic carbonate hydrogenation,the challenges as well as the potential applications of the technologies in these energy-intensive industries with carbonate minerals as raw materials were proposed,which provided promising new pathways for carbon neutrality.
carbon neutralitycarbonate mineralshydrogenationcatalysisreduction of CO2 emission
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