A system and method for processing unconditioned syngas first removes solids and semi-volatile organic compounds (SVOC), then removes volatile organic compounds (VOC), and then removes at least one sulfur containing compound from the syngas. Additional processing may be performed depending on such factors as the source of syngas being processed, the products, byproducts and intermediate products desired to be formed, captured or recycled and environmental considerations.

A system and method for processing unconditioned syngas first removes solids and semi-volatile organic compounds (SVOC), then removes volatile organic compounds (VOC), and then removes at least one sulfur containing compound from the syngas. Additional processing may be performed depending on such factors as the source of syngas being processed, the products, byproducts and intermediate products desired to be formed, captured or recycled and environmental considerations.

Generation of bubbles in an organic-substance production apparatus is suppressed. A gas treatment method including: an adsorption step of passing a source gas containing at least carbon dioxide and nitrogen through an adsorption unit for adsorbing carbon dioxide to reduce a carbon dioxide concentration in the source gas; a supply step of supplying the source gas whose carbon dioxide concentration has been reduced by the adsorption step to an organic-substance production apparatus; and a monitoring step of monitoring a carbon dioxide concentration and a nitrogen concentration in the source gas; wherein the adsorption step has an ability regulation step of enhancing an ability of the adsorption unit to reduce a carbon dioxide concentration in the source gas, when a total concentration of the carbon dioxide concentration and the nitrogen concentration monitored in the monitoring step exceeds a threshold value.

The present invention provides a process for the manufacture of a synthetic fuel comprising gasifying a carbonaceous feedstock comprising waste materials and/or biomass to generate a raw synthesis gas; supplying the raw synthesis gas to a primary clean-up zone to wash particulates and ammonia or HCl out of the raw synthesis gas; contacting the synthesis gas in a secondary clean-up zone with a physical solvent for sulphurous materials; contacting the desulphurised raw synthesis gas in a tertiary clean-up zone with a physical solvent for CO.sub.2 effective to absorb CO.sub.2; removing at least part of the absorbed CO.sub.2 in a solvent regeneration stage to recover CO.sub.2 in a form sufficiently pure for sequestration or other use; and supplying the clean synthesis gas to a further reaction train to generate a synthetic fuel.

A process for the production of hydrogen comprises: a first steam reforming step of a feedstock containing hydrocarbons to obtain a first synthesis gas; a first synthesis gas shift and cooling step on the first synthesis gas; a separation step for separating the first synthesis gas into a high concentration hydrogen stream and a tail gas stream; a second low pressure steam reforming step performed on the tail gas to obtain a second synthesis gas; a second synthesis gas shift and cooling step on the second synthesis gas; a CO2 removal step performed on the stream of hydrogen and carbon dioxide exiting the second synthesis gas shift and cooling step in order to separate a CO2 stream from a fuel grade hydrogen stream; a step of feeding at least a part of the fuel grade hydrogen stream to the first steam reforming step.

The invention concerns a process for producing carbon monoxide (CO) from a feed stream comprising carbon dioxide (CO2) and natural gas and/or naphtha the process comprising a syngas generation step, a CO2 removal step and a CO purification step and the process further comprises an SOEC unit which produces CO from a CO2 stream, the process is especially suited for increasing the capacity of existing known CO production plants.

Steam reforming processes can include treatment of syngas by water gas shift, water separation, and hydrogen separation by pressure swing adsorption (PSA). Additionally, CO.sub.2 can be scrubbed from the syngas prior to the PSA. PSA tail gas, including CH.sub.4, CO, and H.sub.2, can be recompressed and recycled to the PSA for further hydrogen separation and to the steam reformer feed to convert eventually all carbon in the feedstock into CO.sub.2 for the scrubber to separate. Fuel requirements can be fulfilled by part of the hydrogen product to eliminate stack CO.sub.2 emissions. The hydrogen used as fuel is heated and turbo-expanded to provide power before being combusted as fuel. A nitrogen purge may be added.

A system and method for processing unconditioned syngas first removes solids and semi-volatile organic compounds (SVOC), then removes volatile organic compounds (VOC), and then removes at least one sulfur containing compound from the syngas. Additional processing may be performed depending on such factors as the source of syngas being processed, the products, byproducts and intermediate products desired to be formed, captured or recycled and environmental considerations.

A system and method for processing unconditioned syngas first removes solids and semi-volatile organic compounds (SVOC), then removes volatile organic compounds (VOC), and then removes at least one sulfur containing compound from the syngas. Additional processing may be performed depending on such factors as the source of syngas being processed, the products, byproducts and intermediate products desired to be formed, captured or recycled and environmental considerations.

The present invention provides a process for the manufacture of a useful product from carbonaceous feedstock of fluctuating compositional characteristics, the process comprising the steps of: continuously providing the carbonaceous feedstock of fluctuating compositional characteristics to a gasification zone; gasifying the carbonaceous feedstock in the gasification zone to obtain raw synthesis gas; sequentially removing ammoniacal, sulphurous and carbon dioxide impurities from the raw synthesis gas to form desulphurised gas and recovering carbon dioxide in substantially pure form; converting at least a portion of the desulphurised synthesis gas to a useful product. Despite having selected a more energy intensive sub-process i.e. physical absorption for removal of acid gas impurities, the overall power requirement of the facility is lower on account of lower steam requirements and thereby leading to a decrease in the carbon intensity score for the facility.