A system and method for producing olefin via dry reforming and olefin synthesis in the same vessel, including providing feed including methane and carbon dioxide to the vessel, converting methane and carbon dioxide in the vessel into syngas (that includes hydrogen and carbon monoxide) via dry reforming in the vessel, and cooling the syngas via a heat exchanger in the vessel. The method includes synthesizing olefin from the syngas in the vessel, wherein the olefin includes ethylene, propylene, or butene, or any combinations thereof.

A method for carrying out catalytic gas phase reactions including providing a tube bundle reactor which has a bundle of reaction tubes that are filled with a catalyst charge and are cooled by a heat transfer medium, conveying a reaction gas through the catalyst charge, the reaction gas flowing into each reaction tube divided into two part flows introduced in the axial direction of the reaction tube at different points in the catalyst charge the catalyst charge has at least two catalyst layers of different activity, wherein the activity of the first catalyst layer, in the flow direction of the reaction gas, is lower than the activity of the at least one other catalyst layer and in step a first part flow is introduced into the first catalyst layer and each further part flow is introduced past the first catalyst layer into the at least one further catalyst layer.

A methane production system comprises: a reaction tank that produces methane and water by reacting CO and/or CO.sub.2 supplied to the reaction tank with hydrogen; a cleaning tank that is located at an upstream side of the reaction tank in a supply direction of the CO and/or CO.sub.2, and removes water-soluble impurities from a raw material gas including the CO and/or CO.sub.2 and the water-soluble impurities by bringing the raw material gas into contact with water; and a first supply line that supplies the raw material gas from which the water-soluble impurities are removed from the cleaning tank to the reaction tank; and a second supply line supplies water produced in the reaction tank from the reaction tank to the cleaning tank to bring the produced water into contact with the raw material gas in the cleaning tank.

The present disclosure provides a composition. In an embodiment, a catalyst composition is provided and includes from 85 mol % to 95 mol % iron metal, and from 15 mol % to 5 mol % indium metal, wherein mol % is based on total moles of iron metal and indium metal. Also provided is a process of contacting, under reaction conditions, a gaseous mixture of carbon monoxide, hydrogen and optionally water with the catalyst composition. The process includes forming a reaction product composed of light olefins.

Separation of carbon dioxide from the exhaust of an internal combustion engine, the production of hydrogen from water, and reformation of carbon dioxide and hydrogen into relatively high-octane fuel components.

A modular reactor configuration for the production of hydrogen (H.sub.2) by means of electrolysis in its single-stage design and of methane (CH.sub.4) in its two-stage design with optional gas storage and gas utilization in fuel cells, wherein the single-stage design, consisting of the electrolyzer, the fuel cell, the gas storage tanks for separate storage of H.sub.2 and oxygen (O.sub.2), the associated lines, the condenser, the H.sub.2O container, the heat storage tanks and the evaporator, is based on the principles of a reversible product cycle for H.sub.2 according to FIG. 1 and can serve both as electricity storage and for H.sub.2 production as fuel gas, and whose two-stage design, exemplified according to FIG. 5 with the additional components the methanation reactor, the lines and, the heat exchangers and as well as the CH.sub.4 discharge in the H.sub.2O condenser, based on extended reversible reference processes, which describe the possible methanation reactions in this second reactor stage with the reaction equations, which can also run in parallel, and are thermodynamically equivalent to the reverse reaction of the oxidation of CH.sub.4 and thus indicate the best possible structures for further technical implementation.

The method for recycling carbon dioxide according to the present invention includes: injecting a reaction gas containing carbon dioxide and a carbon raw material into a rotary heating furnace; reacting the reaction gas and the carbon raw material with each other in the rotary heating furnace to generate a hydrocarbon precursor containing carbon monoxide; and converting the hydrocarbon precursor into a hydrocarbon compound, thereby exhibiting excellent conversion rate of carbon dioxide.

The invention relates to a method for converting a gas into methane (CH4) which includes: a step of activating a catalytic material including praseodymium oxide (Pr6O11) associated with nickel oxide (NiO) and alumina (Al2O3), the respective proportions of which are, relative to the total mass of these three compounds: Pr6O11: 1 wt % to 20 wt %, NiO: 1 wt % to 20 wt %, and A12O3: 60 to 98 wt %; and a step of passing a gas including at least one carbon monoxide (CO) over the activated catalytic material.

A method for carrying out catalytic gas phase reactions including providing a tube bundle reactor which has a bundle of reaction tubes that are filled with a catalyst charge and are cooled by a heat transfer medium, conveying a reaction gas through the catalyst charge, the reaction gas flowing into each reaction tube divided into two part flows introduced in the axial direction of the reaction tube at different points in the catalyst charge the catalyst charge has at least two catalyst layers of different activity, wherein the activity of the first catalyst layer, in the flow direction of the reaction gas, is lower than the activity of the at least one other catalyst layer and in step a first part flow is introduced into the first catalyst layer and each further part flow is introduced past the first catalyst layer into the at least one further catalyst layer.

The present disclosure provides oxidative coupling of methane (OCM) systems for small scale and world scale production of olefins. An OCM system may comprise an OCM subsystem that generates a product stream comprising C.sub.2+ compounds and non-C.sub.2+ impurities from methane and an oxidizing agent. At least one separations subsystem downstream of, and fluidically coupled to, the OCM subsystem can be used to separate the non-C.sub.2+ impurities from the C.sub.2+ compounds. A methanation subsystem downstream and fluidically coupled to the OCM subsystem can be used to react H.sub.2 with CO and/or CO.sub.2 in the non-C.sub.2+ impurities to generate methane, which can be recycled to the OCM subsystem. The OCM system can be integrated in a non-OCM system, such as a natural gas liquids system or an existing ethylene cracker.