56 results about "Hydromethanation" patented technology

The present invention relates to processes for preparing gaseous products, and in particular methane and/other value added gases such as hydrogen, via the catalytic hydromethanation of a carbonaceous feedstock in the presence of steam and syngas, wherein a hydromethanation reactor is combined with a syngas generator in a particular combination.

The present invention relates to an integrated process for preparing combustible gaseous products via the hydromethanation of carbonaceous feedstocks in the presence of steam, carbon monoxide, hydrogen, a hydromethanation catalyst and optionally oxygen, and generating electrical power from those combustible gaseous products as well as a hydrogen and/or methane by-product stream.

The present invention relates to a 2-mode processes for preparing gaseous products, and in particular a hydrogen product stream, via the hydromethanation of carbonaceous feedstocks in the presence of steam, carbon monoxide, hydrogen and a hydromethanation catalyst in a first mode, and a partial oxidation of methane in a second mode.

The present invention relates to processes for preparing gaseous products, and in particular methane, via the catalytic hydromethanation of a carbonaceous feedstock in the presence of steam, syngas and an oxygen-rich gas stream.

The present invention relates to processes for preparing gaseous products, and in particular methane, via the hydromethanation of carbonaceous feedstocks in the presence of steam, carbon monoxide, hydrogen and a hydromethanation catalyst.

The present invention relates to processes and apparatuses for hydromethanating a vanadium-containing carbonaceous feedstock while recovering at least a portion of the vanadium content originally present in the carbonaceous feedstock.

The present invention relates to processes for hydromethanating a carbonaceous feedstock to a methane-enriched synthesis gas, where an oxygen-rich gas stream and the carbonaceous feedstock are fed into a fluidized-bed hydromethanation reactor at a specified zone in order to assist in heat management within the hydromethanation reactor.

The present invention relates to processes for hydromethanating a carbonaceous feedstock to a methane-enriched synthesis gas, where an oxygen-rich gas stream and the carbonaceous feedstock are fed into a fluidized-bed hydromethanation reactor, and where the carbonaceous feedstock as fed into the hydromethanation reactor has an elevated moisture content in order, for example, to assist in heat management within the hydromethanation reactor.

The present invention relates generally to processes for hydromethanating a carbonaceous feedstock in a hydromethanation reactor to a methane product stream and a char by-product, and more specifically to removal of the char by-product from the hydromethanation reactor.

The invention provides a high selectivity carbon dioxide methanation catalyst and a preparation method and application thereof, the catalyst comprises active components, auxiliary agents and a carrier; noble metal Ru or Rh is used as a main catalytic active component, one or a plurality of elements selected from I and II main group and II, III and VII sub group are used as the auxiliary agents, and Ce-Zr oxide in a certain proportion is used as the carrier. The high selectivity carbon dioxide methanation catalyst is used in the manner of particles or coating (wall loading) of the carrier, the auxiliary agents and the active components on to an overall structure catalyst or a metal honeycomb. The catalyst has high activity and high selectivity of methanation, no CO content and the like, the catalyst can be applied to hydrogenation methanation removal of CO2 in a space station, can be applied to the process of natural gas production from coal, process gas CO2 conversion and utilization process and the like, and can realize the new energy development and energy saving and emission reduction.

The invention discloses a ruthenium-based carbon dioxide hydromethanation catalyst and a preparation method thereof, and belongs to the technical field of catalysis. The preparation method comprises the following steps: selecting different types of ionic liquids and fully mixing the ionic liquids with a reducing agent solution; dropwise adding a salt solution containing Ru<3+> into the mixed solution; performing heating, stirring and refluxing for a period of time under the protection of inert gas to obtain ionic liquid-stabilized nano Ru particles with different particle sizes, cooling the nano Ru particles to a certain temperature after reaction, and washing the nano Ru particles with a proper solvent; and ultrasonically stirring and depositing the Ru nano particles on different carriers, and finally performing vacuum drying treatment to obtain the ruthenium-based CO2 hydromethanation catalyst. The ruthenium-based catalyst has good metal dispersity, the methanation reaction temperature is reduced, the catalyst has good reaction activity and stability under the low-temperature condition, and the ruthenium-based catalyst can be used for improving the low-temperature CO2 methanationcatalytic performance.