Systems and methods for processing crude methanol are disclosed. A crude methanol stream, comprising methanol and paraffin wax, is produced from syngas (carbon monoxide, carbon dioxide, and hydrogen). The crude methanol stream is cooled to form a partially condensed crude methanol stream, which is further separated in a vapor-liquid separator to form a liquid stream and a gas stream. The liquid stream is further cooled in a dewaxing unit to remove paraffin wax. The dewaxing unit includes two or more cooling units arranged in parallel such that when one of the cooling units is offline for cleaning, the methanol system does not need to be shut down.

Systems and methods for processing crude methanol are disclosed. A crude methanol stream, comprising methanol and paraffin wax, is produced from syngas (carbon monoxide, carbon dioxide, and hydrogen). The crude methanol stream is cooled to form a partially condensed crude methanol stream, which is further separated in a vapor-liquid separator to form a liquid stream and a gas stream. The liquid stream is further cooled in a dewaxing unit to remove paraffin wax. The dewaxing unit includes two or more cooling units arranged in parallel such that when one of the cooling units is offline for cleaning, the methanol system does not need to be shut down.

Provided is a process for producing pure methanol from carbon dioxide-rich synthesis gas, the process including the following steps: at least partially reacting the carbon dioxide rich synthesis gas in a methanol synthesis unit, discharging a liquid crude methanol stream from the methanol synthesis unit, introducing the liquid crude methanol stream into a flash tank, discharging from the flash tank a liquid depressurized crude methanol stream as a bottoms product and a gaseous overhead product stream having synthesis gas components, introducing the liquid depressurized crude methanol stream into a distillation apparatus having of a single distillation column, separating the crude methanol stream in the distillation column, discharging an overhead product stream via an overhead product outlet, discharging a bottoms product stream via the bottoms product outlet, and discharging a pure methanol product stream via a first side draw.

Systems and methods for processing crude methanol are disclosed. A crude methanol stream, comprising methanol and paraffin wax, is produced from syngas (carbon monoxide, carbon dioxide, and hydrogen). The crude methanol stream is cooled to form a partially condensed crude methanol stream, which is further separated in a vapor-liquid separator to form a liquid stream and a gas stream. The liquid stream is further cooled in a dewaxing unit to remove paraffin wax. The dewaxing unit includes two or more cooling units arranged in parallel such that when one of the cooling units is offline for cleaning, the methanol system does not need to be shut down.

Systems and methods for processing crude methanol are disclosed. A crude methanol stream, comprising methanol and paraffin wax, is produced from syngas (carbon monoxide, carbon dioxide, and hydrogen). The crude methanol stream is cooled to form a partially condensed crude methanol stream, which is further separated in a vapor-liquid separator to form a liquid stream and a gas stream. The liquid stream is further cooled in a dewaxing unit to remove paraffin wax. The dewaxing unit includes two or more cooling units arranged in parallel such that when one of the cooling units is offline for cleaning, the methanol system does not need to be shut down.

A monolith-type reactor includes a separation membrane, a first flow path, a second flow path, and a catalyst. The separation membrane is permeable to a product of conversion reaction of a raw material gas containing at least hydrogen and carbon dioxide to a liquid fuel. The raw material gas flows through the first flow path. A sweep gas for sweeping the product that has permeated through the separation membrane flows through the second flow path. The catalyst is disposed in the first flow path and configured to promote the conversion reaction of the raw material gas to the liquid fuel. In a side view of the separation membrane, a direction in which the sweep gas flows through the second flow path is opposite to the direction in which the raw material gas flows through the first flow path.

The invention relates to a process for producing methanol and to a plant for producing methanol. A first fresh gas suitable for production of methanol is precompressed by a first compressor stage to obtain a second fresh gas. The second fresh gas is merged with a recycle gas stream and further compressed to synthesis pressure in a second compressor stage. Catalytic conversion of the thus obtained synthesis gas stream in a plurality of serially arranged reactor stages with intermediate condensation and separation of the crude methanol reduces the recycle gas amount in the synthesis circuit to such an extent that recycle gas may be directly recycled to the second fresh gas stream, thus ensuring that no recycle gas compressor stage is required and that the total compressor power may be reduced.

Proposed is a process for producing methanol from synthesis gas by means of multi-stage, for example 2-stage, heterogeneously catalyzed methanol synthesis, wherein the product stream of a synthesis stage is applied to the downstream synthesis stage as a feed stream or after removal of a purge stream recycled to the first synthesis stage as a recycle stream. According to the invention a substream is removed from the synthesis gas fresh gas and introduced into the second methanol synthesis reactor as a bypass stream.

A method for producing one or more hydrocarbons includes feeding a process gas stream into a reactor arrangement. The process gas stream includes carbon dioxide and/or carbon monoxide with hydrogen, which are converted at least in part in a first reaction step into one or more oxygenates, which are converted at least in part in a second reaction step into the one or more hydrocarbons. The reactor arrangement has one or more reactors, which comprise a first reaction zone and a second reaction zone arranged downstream of the first reaction zone. The first reaction zone and the second reaction zone are equipped with catalysts in such a way that the first and second reaction steps are catalyzed in the first reaction zone and that the second reaction step is catalyzed in the second reaction zone. In the second reaction zone, the first reaction step is generally not catalyzed.

A method for producing one or more hydrocarbons includes feeding a process gas stream into a reactor arrangement. The process gas stream includes carbon dioxide and/or carbon monoxide with hydrogen, which are converted at least in part in a first reaction step into one or more oxygenates, which are converted at least in part in a second reaction step into the one or more hydrocarbons. The reactor arrangement has one or more reactors, which comprise a first reaction zone and a second reaction zone arranged downstream of the first reaction zone. The first reaction zone and the second reaction zone are equipped with catalysts in such a way that the first and second reaction steps are catalyzed in the first reaction zone and that the second reaction step is catalyzed in the second reaction zone. In the second reaction zone, the first reaction step is generally not catalyzed.