In a method for the reduction of methanol emission from an ammonia plant, a chilled methanol-containing feed gas is fed to a methanol absorber, carbon dioxide is separated from the gas phase leaving the methanol absorber, the methanol-containing gas is fed to a final separator, and the chilled, methanol-free process condensate from the final separator is used to wash out the methanol in a scrubbing column. By cooling the streams to the column and inserting a number of individual wash trays in the column, a practically quantitative removal of methanol is possible.

The process comprises: introducing a feed flow in a synthesis gas generation unit to form a synthesis gas flow and introducing the synthesis gas flow in a Fischer-Tropsch synthesis unit at least partially removing carbon dioxide from a first flow formed from a Fischer-Tropsch tail gas flow to form a carbon dioxide depleted flow; forming a tail gas recycle flow from the carbon dioxide depleted flow; introducing the tail gas recycle flow in the synthesis gas generation unit and/or in the synthesis gas flow. The process comprises adjusting the carbon dioxide content in the tail gas recycle flow to control the hydrogen to carbon monoxide molar ratio in the synthesis gas flow to a target hydrogen to carbon monoxide molar ratio.

The process comprises: introducing a feed flow in a synthesis gas generation unit to form a synthesis gas flow and introducing the synthesis gas flow in a Fischer-Tropsch synthesis unit at least partially removing carbon dioxide from a first flow formed from a Fischer-Tropsch tail gas flow to form a carbon dioxide depleted flow; forming a tail gas recycle flow from the carbon dioxide depleted flow; introducing the tail gas recycle flow in the synthesis gas generation unit and/or in the synthesis gas flow. The process comprises adjusting the carbon dioxide content in the tail gas recycle flow to control the hydrogen to carbon monoxide molar ratio in the synthesis gas flow to a target hydrogen to carbon monoxide molar ratio.

It is provided a process for increasing production of carbon monoxide (CO) and recycling carbon dioxide when treating synthesis gas using a carbon dioxide-to-carbon monoxide conversion unit, such as a Reverse Water Gas Shift (RWGS) reactor, converting excess CO.sub.2 from the produced syngas to additional CO, using an external source of green, renewable or low carbon intensity hydrogen.

It is provided a process for increasing production of carbon monoxide (CO) and recycling carbon dioxide when treating synthesis gas using a carbon dioxide-to-carbon monoxide conversion unit, such as a Reverse Water Gas Shift (RWGS) reactor, converting excess CO.sub.2 from the produced syngas to additional CO, using an external source of green, renewable or low carbon intensity hydrogen.

The invention relates to a process and a device for generating a fuel gas for a gas turbine by separating off sulphur components from a gas mixture containing hydrogen, carbon monoxide, carbon dioxide and also carbonyl sulphide and/or hydrogen sulphide, which gas mixture is in this case scrubbed in a physical gas scrubber with a methanol scrubbing medium at a pressure between 30 and 80 bar(a) in order to obtain a first sulphur-free gas mixture and also a methanol scrubbing medium loaded with sulphur components and carbon dioxide, which methanol scrubbing is then regenerated, wherein a carbon dioxide-rich gas phase that contains sulphur components and is formed by pressure reduction is treated in a further gas scrubber with a methanol scrubbing medium in order to back-wash sulphur components and to generate a second sulphur-free gas mixture.

A system and method for the pyrolysis of a pyrolysis feedstock utilizes a pyrolysis reactor having a pyrolysis conduit and a solids return conduit segment. Each segment is configured with an outlet and an inlet to receive and discharge solid materials that are circulated through the reactor through the different segments. A solids conveyor is disposed within the pyrolysis conduit segment to facilitate conveying solid materials from the solids inlet upward through the pyrolysis conduit segment toward the solids discharge outlet. A pyrolysis feedstock is introduced into the pyrolysis reactor and at least a portion of the feedstock is converted to pyrolysis gases within the pyrolysis conduit segment, which are discharged through a gas outlet.

A method for gas separation, purification and clarification by FTrPSA uses the temperature and pressure of different raw gases as well as the differences in adsorption separation coefficients and physicochemical properties among all components in the raw gases at a temperature range of 80-200 C. and a pressure range of 0.03-4.0 Mpa, regulates the adsorption or desorption regeneration operation in the PSA cycle process by coupling various separation methods, and expands the adsorption theory that the PSA or TSA separation process is limited to the cyclic operation of adsorption and desorption regeneration through pressure or temperature changes, thus realizing the gradient utilization of energy in the process of gas separation, purification and clarification as well as the easy-to-match and easy-to-balance cyclic operation of adsorption and desorption regeneration in the process of intercooling & shallow-cooling and medium & high-temperature PSA separation to separate, purify and clarify various raw gases.

A process for the gasification of a solid carbonaceous feed, the process comprising the steps of: introducing a batch of the solid carbonaceous feed into a sluice vessel, while an internal pressure in the sluice vessel is at a first pressure; introducing at least recycled CO2 into the sluice vessel via one or more gas inlets covered by the solid carbonaceous feed, to pressurize the sluice vessel from the first pressure to a second pressure exceeding the first pressure, during a predetermined time period; closing the one or more gas inlets; opening a feed outlet of the sluice vessel to supply the batch of the solid carbonaceous feed to a feed vessel for feeding the solid carbonaceous feed to a gasification reactor; closing the feed outlet; venting the sluice vessel to reduce the internal pressure to the first pressure; and repeating the process.

The present disclosure relates to a processes and systems for producing fuels from biomass with high carbon conversion efficiency. The processes and systems described herein provide a highly efficient process for producing hydrocarbons from biomass with very low Green House Gas (GHG) emissions using a specific combination of components, process flows, and recycle streams. The processes and systems described herein provide a carbon conversion efficiency greater than 95% with little to no GHG in the flue gas due to the novel arrangement of components and utilizes renewable energy to provide energy to some components. The system reuses water and carbon dioxide produced in the process flows and recycles naphtha and tail gas streams to other units in the system for additional conversion to syngas to produce hydrocarbon-based fuels.