The invention relates to a method and a system for producing a hydrocarbon- and hydrogen-containing gas mixture from plastics, and the use of the system for producing this gas mixture and the use of this gas mixture as a starting material in chemical syntheses or for gas supply.

The invention relates to a method and a system for producing a hydrocarbon- and hydrogen-containing gas mixture from plastics, and the use of the system for producing this gas mixture and the use of this gas mixture as a starting material in chemical syntheses or for gas supply.

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 system and process for the resultant gas constituent-controlled gasification of a carbonaceous feedstock uses feedback loop-controlled pyrolysis to produce a stable and predictable gas product from a variable or unknown feedstock, such as MSW, that may include methane, ethane, and other desirable hydrocarbon gases, and a solid product, that includes activated Carbon or Carbon.

The process of the present invention provides high recovery and low capital cost giving it an economic advantage over previously known purification processes. The present process has particular applicability to the purification of synthesis gases comprising at least hydrogen (H.sub.2), carbon monoxide (CO), methane (CH.sub.4), CO.sub.2, and H.sub.2O to obtain a gas stream including at least H.sub.2, CO, and CH.sub.4, that is substantially free of H.sub.2O and CO.sub.2. The process also has applicability to the purification of natural gases inclusive of at least CH.sub.4, N.sub.2, CO.sub.2, and H.sub.2O to produce a gas stream including at least CH.sub.4 and N.sub.2, but which is substantially free of H.sub.2O and CO.sub.2.

The process of the present invention provides high recovery and low capital cost giving it an economic advantage over previously known purification processes. The present process has particular applicability to the purification of synthesis gases comprising at least hydrogen (H.sub.2), carbon monoxide (CO), methane (CH.sub.4), CO.sub.2, and H.sub.2O to obtain a gas stream including at least H.sub.2, CO, and CH.sub.4, that is substantially free of H.sub.2O and CO.sub.2. The process also has applicability to the purification of natural gases inclusive of at least CH.sub.4, N.sub.2, CO.sub.2, and H.sub.2O to produce a gas stream including at least CH.sub.4 and N.sub.2, but which is substantially free of H.sub.2O and CO.sub.2.

The disclosure relates to a rotary kiln catalytically enhanced oxy-fuel gasification and oxy-fuel combustion system—power plant including an air separation unit arranged to separate oxygen from air and produce a stream of substantially pure liquid oxygen; rotary kiln gasifiers to convert municipal solid waste, biomass, alternate wastes, coal, or hydrocarbon fuels into a synthesis gas in the presence of oxygen, carbon dioxide, high temperature steam and lime catalysts; an oxy-fuel fired boiler arranged to combust synthesis gas, in the presence of substantially pure oxygen gas, to produce an exhaust gas comprised of water and carbon dioxide; and a carbon dioxide removal unit arranged to recover carbon dioxide gas from the exhaust gas, recycle a portion of the recovered carbon dioxide gas for use in the rotary kiln gasifier, and liquefy the remainder of the recovered carbon dioxide gas for removal from the plant. In this new plant, the carbon dioxide removal unit is thermally integrated with the air separation unit or alternately the liquid oxygen storage and supply system by directing a stream of liquid oxygen to the carbon dioxide removal unit to liquefy the recovered carbon dioxide gas, the liquid oxygen thereby evaporating and forming cold oxygen gas which is heated prior to consumption in the rotary kiln and oxy-fuel fired boiler.

Disclosed is an adsorbent containing a metal oxide for adsorption of hydrogen sulfide in biogas, and a biogas purification system using the same.

Disclosed is an adsorbent containing a metal oxide for adsorption of hydrogen sulfide in biogas, and a biogas purification system using the same.

This invention introduces a method of preparing a carbon-based sulfur-loading iron-containing adsorbent for mercury removal, which can solve the problems in the prior art that sulfur-rich heavy organic materials have low-value utilization and the elemental mercury in atmosphere is hard to be efficiently and economically removed by the existing mercury removal agents. A carbon-based sulfur-loading iron-containing adsorbent for mercury removal is prepared in this invention. The adsorbent with a porous structure is prepared in situ by performing steps such as chemical activation of sulfur-rich heavy organic materials that are rich in iron. The adsorbent prepared herein has good mercury removal performance in simulated coal-fired flue gas. This invention not only improves the utilization value of sulfur-rich heavy organic materials, but also prevents SO.sub.X pollution caused by the combustion of sulfur-rich heavy organic materials and controls mercury pollution in the coal-fired flue gas.