Abstract:
A liquid phase process for direct utilization of inorganic metal carbonate and related salts under hydrogenative conditions to produce value-added fuels and feedstocks such as methanol, methane, carbon monoxide, and higher hydrocarbons. Advantageously, the reaction can use heterogeneous catalysts. The hydrogenation proceeds with high selectivity and yield for the desired product at relatively low temperatures, along with co-production of metal hydroxide. The metal hydroxide can be used to capture CO2, forming metal carbonates and bicarbonates that can be reused to produce more methanol and methane, hydrocarbons and carbon monoxide, closing the loop. Such a hydrogenation process can thus also be used in a "carbon capture and recycling" manner to produce renewable methane, methanol, carbon monoxide, hydrocarbons, and other carbon feedstocks from CO2 sourced from any natural and anthropogenic emissions as well as from ambient air.
Abstract:
The invention relates to regenerative, solid sorbents for adsorbing carbon dioxide from a gas mixture, including air, with the sorbent including a modified polyamine and a solid support. The modified polyamine is the reaction product of an amine and an epoxide. The sorbent provides structural integrity, as well as high selectivity and increased capacity for efficiently capturing carbon dioxide from gas mixtures, including the air. The sorbent is regenerative, and can be used through multiple cycles of adsorption-desorption.