A chemical looping combustion (CLC) process for sour gas combustion is integrated with a gas turbine combined cycle and a steam generation unit, and is configured to provide in-situ removal of H.sub.2S from the sour gas fuel by reacting the H.sub.2S with a oxygen carrier at a location within the fuel reactor of the CLC unit. The process is also configured such that oxygen-rich exhaust gases from the gas turbine combined cycle is used to feed the air reactor of the CLC unit and re-oxidize oxygen carriers for recirculation in the CLC unit.

Metal oxides having a lower activation temperature and enhanced oxygen mobility are disclosed. The metal oxides comprise oxygen (O), cerium (Ce) and one or both of iron (Fe) and uranium (U). Also disclosed are methods for producing hydrogen or carbon monoxide from water or carbon dioxide using the metal oxides.

To provide a catalyst, which is formed from a perovskite oxide, for thermochemical fuel production, and a method of producing fuel using thermochemical fuel production that is capable of allowing a fuel to be produced in a thermochemical manner. Provided is a catalyst for thermochemical fuel production, which is used for producing the fuel from thermal energy by using a two-step thermochemical cycle of a first temperature and a second temperature that is equal to or lower than the first temperature, wherein the catalyst is formed from a perovskite oxide having a compositional formula of AXO.sub.3?? (provided that, 0???1). Here, A represents one or more of a rare-earth element (excluding Ce), an alkaline earth metal element, and an alkali metal element, X represents one or more of a transition metal element and a metalloid element, and O represents oxygen.

A thermal oxidation-reduction cycle is disclosed that uses iron titanium oxide as the reactive material. The cycle may be used for the thermal splitting of water and/or carbon dioxide to form hydrogen and/or carbon monoxide. The formed compounds may be used as syngas precursors to form fuels.

An example method for operating an energy recovery system may comprise providing a reducing gas stream to an inlet of the energy recovery system, contacting redox particles with the reducing gas stream, whereupon the at least one reducing gas species undergoes a chemical reaction with the redox particles to generate carbon dioxide (CO.sub.2) and/or steam (H.sub.2O) obtaining a first product stream from the energy recovery system, providing an oxidizing gas stream comprising steam (H.sub.2O) to the energy recovery system such that hydrogen gas (H.sub.2) is generated, and obtaining a second product stream from the energy recovery system, the second product stream comprising hydrogen gas (H.sub.2). The reducing gas stream may comprise at least one reducing gas species comprising at least one of carbon monoxide (CO), methane (CH.sub.4), hydrocarbons (C.sub.2+), hydrogen gas (H.sub.2), and carbon dioxide (CO.sub.2). The first product stream may comprise carbon dioxide (CO.sub.2) and steam (H.sub.2O).

The present disclosure relates to methods and reactors for generating of gas and specifically for generation of oxygen gas and hydrogen gas.

The present invention relates to a device for producing compressed hydrogen, comprising a pressure-resistant reactor (1) with a reactor chamber having a metal-containing contact mass (2), wherein the reactor (1) comprises at least one feed line (3) for feeding fluids into the reactor chamber and at least one discharge line (4) for discharging fluids from the reactor chamber, wherein the at least one discharge line is provided with a device (5a, 5b, 5c, 5d) for controlling or regulating the flow rate, preferably having a valve, for adjusting the pressure within the reactor chamber, wherein a conveyance means is provided on at least one feed line for introducing a water-containing medium into the reactor chamber and wherein at least one discharge line (4) protrudes into the reactor chamber or opens directly into the reactor chamber, through which the compressed hydrogen is discharged from the reactor chamber, wherein the reactor chamber exhibits at least two areas that are separate from each other and connected in a gas-conducting manner, of which at least one area comprises the metal-containing contacting mass (2) and at least one additional area comprises at least one inert material (7, 13).

The present invention relates to a catalyst for the thermochemical generation of hydrogen from water and/or the thermochemical generation of carbon monoxide from carbon dioxide comprising a solid solution of cerium dioxide and uranium dioxide.

An ink composition for additive manufacturing comprises at least a first phase, the first phase being a liquid phase, and inorganic particles being distributed in the first phase. The inorganic particles are redox active. The first phase furthermore comprises at least one organic processing additive. In a method of additive manufacturing a structure for use in a thermochemical fuel production process and/or in a heat transfer application, said ink composition is deposited so as to form a precursor structure, and said precursor structure is subjected to at least one thermal treatment so as to form the structure for use in the thermochemical fuel production process and/or in the heat transfer application.

The invention relates to a method for producing syngas by means of solar radiation, in which the reactor of a receiver-reactor is periodically heated via an aperture provided in the same for solar radiation by means of the solar radiation to an upper reduction temperature for a reduction process and subsequently cooled to a lower oxidation temperature for an oxidation process in the presence of an oxidation gas, wherein the sunlight is guided through an absorption chamber onto an absorber configured as a reactor, which includes a reducible/oxidizable material, and wherein a gas that absorbs the black-body radiation of the absorber is guided through the absorption chamber and the absorption chamber is configured so that the back radiation of the absorber through the aperture is essentially absorbed by the gas. Radiation losses caused by back radiation of the black-body radiation exiting the optical aperture are thus avoided in accordance with the invention. The heat of the back radiation, however, can be utilized directly in the heat-transporting fluid and is available for a flexible usage. The receiver-reactor has a simple design and is suitable as a low-cost receiver-reactor.