A device and method for cleaning producer gas includes a filter bed housing and a microwave chamber. The filter bed housing comprises an inlet for carbon-based material and a spent carbon outlet. The microwave chamber comprises a permeable top and wave guides around the perimeter through which microwaves can be introduced into the device using magnetrons. The method comprises using the device by filling the filter bed housing with carbon-based material, introducing microwaves into the microwave chamber using the magnetrons and wave guides, passing the gas through carbon-based material in the filter bed chamber, the microwave chamber, the gas permeable top and the gas outlet.

A device and method for cleaning producer gas includes a filter bed housing and a microwave chamber. The filter bed housing comprises an inlet for carbon-based material and a spent carbon outlet. The microwave chamber comprises a permeable top and wave guides around the perimeter through which microwaves can be introduced into the device using magnetrons. The method comprises using the device by filling the filter bed housing with carbon-based material, introducing microwaves into the microwave chamber using the magnetrons and wave guides, passing the gas through carbon-based material in the filter bed chamber, the microwave chamber, the gas permeable top and the gas outlet.

This source gas purification apparatus includes: a first H.sub.2S removing device 2 which removes H.sub.2S from a source gas that includes at least a hydrocarbon, H.sub.2S, and a sulfur compound other than H.sub.2S; a sulfur compound conversion device 3 which converts the sulfur compound other than H.sub.2S into H.sub.2S; and a second H.sub.2S removing device 4 which removes the converted H.sub.2S.

A method for treatment of a gas having 10 to 0.5% by volume of at least one of COS and CS.sub.2, and 30 ppm to 5% by volume of unsaturated hydrocarbons: a) hydrogenation of organic compounds unsaturated with respect to paraffins by contacting the gas with a hydrogenation catalyst in the presence of hydrogen at 100 to 400 C., to provide an effluent that is low in unsaturated hydrocarbon compounds, the hydrogenation catalyst having at least one metal that is palladium, platinum, nickel, or cobalt deposited on a porous substrate. b) catalytic hydrolysis-hydrogenation in the presence of water of COS and/or CS.sub.2 present in the effluent of a) to provide an H.sub.2S-rich effluent by bringing the effluent from a) into contact with a hydrolysis-hydrogenation catalyst.

A method for treating vapours generated during the pyrolysis of carbon fibre composites, such as production waste generated by the producers or composites of carbon fibre at the end of the service life thereof, includes, passing the vapours through a reactor which is at a high temperature and contains a solid material filler (solid bed), for example CSi, and optionally also a solid catalyst having an acid and/or reforming function, preferably both, for example a transition metal supported on an acid substrate, such as Ni on zeolite. Following the condensation of the vapours resulting from the treatment, an improved aqueous liquid phase, a minimum or non-existent organic fraction and a gaseous phase of increased added value are obtained.

This disclosure provides a system and method for conversion of raw syngas and tars into refined syngas, while optionally minimizing the parasitic losses of the process and maximizing the usable energy density of the product syngas. The system includes a reactor including a refining chamber for refining syngas comprising one or more inlets configured to promote at least two flow zones: a central zone where syngas and air/process additives flow in a swirling pattern for mixing and combustion in the high temperature central zone; at least one peripheral zone within the reactor which forms a boundary layer of a buffering flow along the reactor walls, (b) plasma torches that inject plasma into the central zone, and (c) air injection patterns that create a recirculation zone to promotes mixing between the high temperature products at the core reaction zone of the vessel and the buffering layer, wherein in the central zone, syngas and air/process additives mixture are ignited in close proximity to the plasma arc, coming into contact with each other, concurrently, at the entrance to the reaction chamber and method of using the system.

This disclosure provides a system and method for conversion of raw syngas and tars into refined syngas, while optionally minimizing the parasitic losses of the process and maximizing the usable energy density of the product syngas. The system includes a reactor including a refining chamber for refining syngas comprising one or more inlets configured to promote at least two flow zones: a central zone where syngas and air/process additives flow in a swirling pattern for mixing and combustion in the high temperature central zone; at least one peripheral zone within the reactor which forms a boundary layer of a buffering flow along the reactor walls, (b) plasma torches that inject plasma into the central zone, and (c) air injection patterns that create a recirculation zone to promotes mixing between the high temperature products at the core reaction zone of the vessel and the buffering layer, wherein in the central zone, syngas and air/process additives mixture are ignited in close proximity to the plasma arc, coming into contact with each other, concurrently, at the entrance to the reaction chamber and method of using the system.

Sour syngas treatment apparatuses and processes for treating a sour syngas stream are provided herein. In an embodiment, a process for treating a sour syngas stream that includes sulfur components and carbon dioxide includes absorbing the sulfur components and carbon dioxide from the sour syngas stream in a primary liquid/vapor phase absorption stage with a solvent to produce a liquid absorbent stream. The liquid absorbent stream includes the solvent, the sulfur components, and carbon dioxide. A portion of the sulfur components from the liquid absorbent stream is directly oxidized in the presence of a direct oxidation catalyst to produce elemental sulfur and a recycle stream. The recycle stream includes an unconverted portion of the sulfur components and carbon dioxide. The recycle stream is recycled for further absorption of the unconverted portion of the sulfur components and carbon dioxide through liquid/vapor phase absorption.

Sour syngas treatment apparatuses and processes for treating a sour syngas stream are provided herein. In an embodiment, a process for treating a sour syngas stream that includes sulfur components and carbon dioxide includes absorbing the sulfur components and carbon dioxide from the sour syngas stream in a primary liquid/vapor phase absorption stage with a solvent to produce a liquid absorbent stream. The liquid absorbent stream includes the solvent, the sulfur components, and carbon dioxide. A portion of the sulfur components from the liquid absorbent stream is directly oxidized in the presence of a direct oxidation catalyst to produce elemental sulfur and a recycle stream. The recycle stream includes an unconverted portion of the sulfur components and carbon dioxide. The recycle stream is recycled for further absorption of the unconverted portion of the sulfur components and carbon dioxide through liquid/vapor phase absorption.

A system and method for improving the quality of a raw gas or raw syngas passes the raw gas or raw syngas past a catalytic element comprising catalyst with an optional sorbent. A downstream measurement of one or more parameters of the improved gas is fed back to a controller configured to regulate the regeneration of the catalyst and optional sorbent and, optionally, the flow rate of the regeneration fluid to the catalytic element. The system and method are particularly suitable for improving raw syngas generated from a carbonaceous material in a fixed bed or fluidized-bed or entrained-flow gasifier. One or more undesirable syngas constituents are subject to one or more of catalytic cracking, reforming, partial oxidation and/or decomposition to promote their conversion into desirable syngas constituents. At least one catalytic element is regenerated in situ, either periodically, continuously, or in a combination of these two modes.