The invention relates to a method for recycling polymer membranes comprising metal-containing catalyst material. The method comprises the following steps adding water without adding organic solvents to a polymer membrane comprising a metal-containing catalyst material to form a polymer membrane/water mixture, simultaneously increasing the pressure and the temperature of the polymer membrane/water mixture to a pressure between 20 bar and 40 bar and a temperature between 200 C. and 250 C., a liquid phase and a solid phase being formed, and separating the liquid phase and the solid phase.

The invention relates to a method for recycling polymer membranes comprising metal-containing catalyst material. The method comprises the following steps adding water without adding organic solvents to a polymer membrane comprising a metal-containing catalyst material to form a polymer membrane/water mixture, simultaneously increasing the pressure and the temperature of the polymer membrane/water mixture to a pressure between 20 bar and 40 bar and a temperature between 200 C. and 250 C., a liquid phase and a solid phase being formed, and separating the liquid phase and the solid phase.

Methods for the operation of membrane reactors (MRs) are disclosed for the efficient production of hydrogen-enriched fuel blends with tunable composition and high hydrogen recovery at both elevated and isobaric pressure operation. These methods enable use of greatly reduced operating temperatures relative to packed bed reactors (PBRs) and elimination of the need for a secondary separation unit operation. These methods provide greater productivity and hydrogen recovery while relaxing membrane selectivity constraints relative to conventional MR operation.

Methods for the operation of membrane reactors (MRs) are disclosed for the efficient production of hydrogen-enriched fuel blends with tunable composition and high hydrogen recovery at both elevated and isobaric pressure operation. These methods enable use of greatly reduced operating temperatures relative to packed bed reactors (PBRs) and elimination of the need for a secondary separation unit operation. These methods provide greater productivity and hydrogen recovery while relaxing membrane selectivity constraints relative to conventional MR operation.

A process for producing high purity hydrogen includes separating a gas stream comprising hydrogen and unreacted light hydrocarbons from a product effluent comprising the gas stream comprising the hydrogen and the unreacted light hydrocarbons, and a spent carbon supported metal catalyst comprising one or more active metal compounds and solid carbon deposits derived from catalytically cracking a light hydrocarbon feedstock in the presence of a carbon supported metal catalyst comprising one or more active metal compounds in a reactor, separating the hydrogen and the unreacted light hydrocarbons from the gas stream comprising the hydrogen and the unreacted light hydrocarbons, and withdrawing high purity hydrogen.

A process for producing high purity hydrogen includes separating a gas stream comprising hydrogen and unreacted light hydrocarbons from a product effluent comprising the gas stream comprising the hydrogen and the unreacted light hydrocarbons, and a spent carbon supported metal catalyst comprising one or more active metal compounds and solid carbon deposits derived from catalytically cracking a light hydrocarbon feedstock in the presence of a carbon supported metal catalyst comprising one or more active metal compounds in a reactor, separating the hydrogen and the unreacted light hydrocarbons from the gas stream comprising the hydrogen and the unreacted light hydrocarbons, and withdrawing high purity hydrogen.

The claimed invention is directed to a catalytic graphitization process to convert fuel-grade petroleum coke into battery-grade graphite using a recyclable catalyst derived from iron, nickel or cobalt.

The claimed invention is directed to a catalytic graphitization process to convert fuel-grade petroleum coke into battery-grade graphite using a recyclable catalyst derived from iron, nickel or cobalt.