The present disclosure relates to a power production system that is adapted to achieve high efficiency power production using partial oxidation of a solid or liquid fuel to form a partially oxidized stream that comprises a fuel gas. This fuel gas stream can be one or more of quenched, filtered, and cooled before being directed to a combustor of a power production system as the combustion fuel. The partially oxidized stream is combined with a compressed recycle CO.sub.2 stream and oxygen. The combustion stream is expanded across a turbine to produce power and passed through a recuperator heat exchanger. The expanded and cooled exhaust stream can be further processed to provide the recycle CO.sub.2 stream, which is compressed and passed through one or more recuperator heat exchangers in a manner useful to provide increased efficiency to the combined systems.

Processes, systems, and methods for producing combustible gas from wet biomass are provided. In one aspect, for example, a process for generating a combustible gas from a wet biomass in a closed system is provided. Such a process may include growing a wet biomass in a growth chamber, moving at least a portion of the wet biomass to a reactor, heating the portion of the wet biomass under high pressure in the reactor to gasify the wet biomass into a total gas component, separating the gasified component into a liquid component, a non-combustible gas component, and a combustible gas component, and introducing the liquid component and non-combustible gas component containing carbon dioxide into the growth chamber to stimulate new wet biomass growth.

Embodiments of the invention are directed to methods, processes, and systems for safely and reliably purifying hydrogen from a gas mixture containing hydrogen and oxygen.

A method and system for producing syngas The method includes providing separate streams of oxygen gas and hydrogen gas, the oxygen gas and the hydrogen gas generated from electrolysis of water. The separate stream of oxygen gas is introduced into a reforming module configured to generate a reformed syngas feed, where the oxygen gas oxidizes natural gas supplied to the reforming module. The separate stream of hydrogen gas and the reformed syngas feed are mixed to adjust a ratio of hydrogen gas to carbon monoxide gas (H.sub.2:CO) to produce a syngas product feed. The system includes a reforming module to receive a stream of oxygen gas, where the oxygen gas oxidizes natural gas supplied to the reforming module to generate a reformed syngas feed. The system includes a mixing module to receive the reformed syngas feed and a stream of hydrogen gas to thereby adjust a ratio of hydrogen gas to carbon monoxide gas (H.sub.2:CO) in a syngas product feed released from the mixing module. The stream of oxygen gas and the stream of hydrogen gas are generated from electrolysis of water.

The present disclosure provides natural gas and petrochemical processing systems including oxidative coupling of methane reactor systems that integrate process inputs and outputs to cooperatively utilize different inputs and outputs of the various systems in the production of higher hydrocarbons from natural gas and other hydrocarbon feedstocks.

The present disclosure discloses a method for preparing hydrogen from secondary aluminum ash, including the following steps: S1. preparing secondary aluminum ash, and subjecting a reaction device to an oxygen replacement treatment; S2. feeding the secondary aluminum ash into the reaction device, adding water, conducting a first hydrolysis reaction to obtain a first gas, and introducing the first gas into a gas collection cabinet; S3. adding calcium hydroxide and sodium hydroxide subsequently to the reaction device, conducting a second hydrolysis reaction to obtain a second gas, and introducing the second gas into the gas collection cabinet; and S4. subjecting a gas mixture in the gas collection cabinet to separation and purification to obtain hydrogen. The method is conducive to improving a hydrogen yield and reducing the toxicity of process products.

An apparatus and method for purifying a raw hydrogen gas stream of chloramines and chlorine is provided. The explosive chloramines compounds can be effectively captured by the carbon adsorbent without accumulating on the carbon surface. Rather, the chloramines are converted via decomposition, into non-explosive products with catalytic effect of the carbon material. Chlorine reacts with impregnated reducing agent on the carbon surface to form the solid products, which can be adsorbed on the carbon surface. The purified hydrogen gas contains little to no trace of chloramines and chlorine impurities, thereby making the hydrogen gas suitable for liquid hydrogen production.

An ammonia decomposition apparatus comprises a casing, a heating zone, a heat exchange zone, a reaction section and a heat exchange coil. The heat exchange coil is spirally wound on an outer wall of the reaction section to efficiently heat ammonia gas. The reaction section has a first reaction zone and a second reaction zone communicated successively, the ammonia gas decomposed into a nitrogen-hydrogen mixture after entering the first reaction zone, with the second reaction zone decomposing for the second time the residual ammonia gas in the nitrogen-hydrogen mixture produced in the first reaction zone, so that the ammonia gas is decomposed more thoroughly. The conversion rate of ammonia gas can reach 99.9% or more, and the residual amount of ammonia gas in the nitrogen-hydrogen mixture can be less than 1000 ppm.

A direct carbonaceous material to power generation system integrates one or more solid oxide fuel cells (SOFC) into a fluidized bed gasifier. The fuel cell anode is in direct contact with bed material so that the H.sub.2 and CO generated in the bed are oxidized to H.sub.2O and CO.sub.2 to create a push-pull or source-sink reaction environment. The SOFC is exothermic and supplies heat within a reaction chamber of the gasifier where the fluidized bed conducts an endothermic reaction. The products from the anode are the reactants for the reformer and vice versa. A lower bed in the reaction chamber may comprise engineered multi-function material which may incorporate one or more catalysts and reactant adsorbent sites to facilitate excellent heat and mass transfer and fluidization dynamics in fluidized beds. The catalyst is capable of cracking tars and reforming hydrocarbons.

A hydrogen generator for use with an inner combustion engine or other apparatus, even of a movable type, such as a home gas kitchen, said hydrogen generator comprises a system for separating hydrogen from ammonia, said system comprising a NH.sub.3 tank, an ammonia sucking pump, and a cracking oven containing a catalyst, an electric resistance and a H.sub.2/N.sub.2 separating centrifuge and including a suction device comprising a filter followed by a bottle for providing a feeding volume necessary for the produced hydrogen to compensate for user system requirement variations.