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.

A method for decreasing the SFFC of a steam reforming plant, including establishing a base operating mode. Then modifying the base operating mode by introducing the shift gas stream into a solvent based, non-cryogenic separator prior to introduction into the pressure swing adsorption and introducing the compressed hydrogen depleted off-gas stream in a membrane separation unit, wherein the membrane is configured to produce the hydrogen enriched permeate stream at a suitable pressure to allow the hydrogen enriched permeate stream to be combined with carbon dioxide lean shift gas stream, prior to introduction into the pressure swing adsorption unit without requiring additional compression. Thereby establishing a modified operating mode. Wherein said pressure swing adsorption unit has a modified overall hydrogen recovery. Wherein said modified operating mode has a modified hydrogen production, a modified hydrogen production unit firing duty, a modified SCO2e, and a modified SFFC.

A method for decreasing the SFFC of a steam reforming plant, including establishing a base operating mode. Then modifying the base operating mode by introducing the shift gas stream into a solvent based, non-cryogenic separator prior to introduction into the pressure swing adsorption and introducing the compressed hydrogen depleted off-gas stream in a membrane separation unit, wherein the membrane is configured to produce the hydrogen enriched permeate stream at a suitable pressure to allow the hydrogen enriched permeate stream to be combined with carbon dioxide lean shift gas stream, prior to introduction into the pressure swing adsorption unit without requiring additional compression. Thereby establishing a modified operating mode. Wherein said pressure swing adsorption unit has a modified overall hydrogen recovery. Wherein said modified operating mode has a modified hydrogen production, a modified hydrogen production unit firing duty, a modified SCO2e, and a modified SFFC.

The present invention is directed to a method and system of purifying hydrogen supplied from a storage cavern, particularly to removing methane and other hydrocarbons from the hydrogen withdrawn from the cavern by using selective adsorption. The adsorbed impurities can be removed from the adsorbent by increasing the temperature, reducing the pressure, or a combination of both.

A furnace for gas fields, refineries reforming, petrochemical plants, or hydrogen generation by gasification may include: a radiant zone; a convective zone; and a first and second series of pipes through which at least two segregated process gas flows respectively pass. A first process gas flow may enter the furnace through the convective zone and, flowing through the first series of pipes, may leave the furnace through the radiant zone, or alternatively the first process gas flow may enter the furnace through the radiant zone and, flowing through the first series of pipes, may leave the furnace through the radiant zone. At least a second process gas flow may enter the furnace through the convective zone, may pass through the second series of pipes, and may leave the furnace through the convective zone. The second of series of pipes may be made of material resistant to acid gases.

A process for the production of a hydrogen gas stream having a CO content of less than 1 ppm having a production cycle comprising two phases: phase 1 includes a) purifying a synthesis gas in a PSA unit, b) recovering a hydrogen gas stream comprising a CO content of greater than 1 ppm, c) purifying the gas stream by adsorption in a TSA unit, and recovery a hydrogen gas stream exhibiting a CO content of less than 1 ppm, and phase 2 includes e) purifying the synthesis gas in a PSA unit, f) recovering a hydrogen gas stream having a CO content of less than 1 ppm, where throughout steps e) and f), the TSA unit is bypassed by the hydrogen gas stream and is regenerated.

The present invention is directed to a method and system of purifying hydrogen supplied from a storage cavern, particularly to removing methane and other hydrocarbons from the hydrogen withdrawn from the cavern by using selective adsorption. The adsorbed impurities can be removed from the adsorbent by increasing the temperature, reducing the pressure, or a combination of both.

Methods and systems are provided for the conversion of waste plastics into various useful downstream recycle-content products. More particularly, the present system and method involves pyrolyzing one or more waste plastics into various pyrolysis products, including pyrolysis gas, and then subjecting the pyrolysis gas to partial oxidation (POX) gasification to thereby form a syngas composition.

A method of using a feedstock gas reactor is described. A hydrocarbon, such as methane, is chemical decomposed in the feedstock gas reactor using heat of combustion generated from the combustion of a combustible gas. A mixed product stream is extracted from the feedstock gas reactor. The mixed product stream comprises hydrogen, carbon, and water. At least a portion of the one or more combustion product gases are vented from the combustion chamber. At least some of the carbon is activated using the vented one or more combustion product gases. At least some of the activated carbon is recycled to the feedstock gas reactor.

Provided are a hydrogen purification device and a hydrogen purification method whereby hydrogen having a high purity can be purified at a high yield from a starting gas. The hydrogen purification device comprises: a starting gas source that supplies a starting gas, said starting gas containing hydrogen molecules and/or a hydride, to a discharge space; a plasma reactor that defines at least a part of the discharge space; a hydrogen flow channel that is connected to the discharge space; and leads out purified hydrogen from the starting gas source; a hydrogen separation membrane that partitions the discharge space from the hydrogen flow channel defines at least a part of the discharge space by one surface thereof and defines at least a part of the hydrogen flow channel by the other surface thereof; an electrode that is positioned outside the discharge space; and an adsorbent that is filled in the discharge space and adsorbs the starting gas. In the hydrogen purification method according to the present invention, the starting gas is adsorbed by the adsorbent in the discharge space. Hydrogen molecules, which have been desorbed from the adsorbent by discharge, are allowed to penetrate through the hydrogen separation membrane 4 and led out into the hydrogen flow channel.