摘要:
The method is used to obtain metals, noble metals, and rare earth metals from scrap. The aim of the invention is to provide a method that allows an efficient recovery even from electronic scrap. This is achieved in that the scrap and carbon-containing materials (A) are oxidized with oxygen containing gases (11) in the presence of alkaline materials under overall reducing conditions with an overall lambda of
摘要:
The present invention is directed to the modification of the hydrocarbon production sequence of operations including the Fischer-Tropsch process for the production of hydrocarbon fuels in an efficient manner, along with the production of commercially valuable co-products from by-products of the hydrocarbon production process.
摘要:
Process for producing purified synthesis gas from soot-containing synthesis gas having a temperature of at least 5° C. above its dew point comprising the steps of (a) cooling the soot-containing synthesis gas to a temperature below its dew point by indirect heat exchange in a shell-tube heat exchanger without removing the condensate formed, thereby forming a synthesis gas/condensate mixture; and (b) contacting the synthesis gas/condensate mixture with a scrubbing liquid to remove the condensate resulting in a purified synthesis gas and used scrubbing liquid, wherein the soot-containing synthesis gas in step (a) is passed through the shell-tube heat exchanger at the tube side.
摘要:
A method for recycling exhaust gas from Fischer-Tropsch synthesis. The method includes: 1) introducing raw gas to a shift reactor to conduct a water-gas shift reaction, and collecting shift gas; 2) introducing the shift gas to a Fischer-Tropsch synthesis device to yield a hydrocarbon fuel and exhaust gas, returning part of the exhaust gas as recycle gas; 3) introducing another part of the exhaust gas to a methanation reactor, allowing a methanation reaction to happen between the part of the exhaust gas and water vapor; 4) introducing a mixed gas product from the methanation reaction to a methane reforming reactor; 5) transporting the hydrogen and carbon monoxide resulting from the methane reforming reaction to a gas separator, separating the hydrogen and obtaining a mixed gas including carbon dioxide; and 6) returning the mixed gas including carbon dioxide to the methane reforming reactor.
摘要:
A method of gasification by introducing a feed material to be subjected to gasification into a dual fluidized bed gasifier comprising a pyrolyzer fluidly connected with a combustor such that a circulation stream comprising a heat transfer material can be continuously circulated between the pyrolyzer, in which the temperature of the circulation stream is reduced, and the combustor, in which the temperature of the circulation stream is increased, wherein the pyrolyzer is operable to convert at least a portion of the feed material into a gasifier product gas comprising hydrogen and carbon monoxide, and wherein the combustor is operable to increase the temperature of the circulation stream via combustion of char introduced thereto with the circulation stream and at least one supplemental fuel. A system for carrying out the method is also provided.
摘要:
A CO shift reaction apparatus 11 according to the present invention includes: adiabatic reactors 31A to 31C, each having CO shift catalyst layers 35A to 35C filled with a CO shift catalyst 34 which reforms CO in gasification gas 15; gas supply lines l11 to l15 which supply the gasification gas 15 to the adiabatic reactors 31A to 31C; first gas flow rate control units 32A and 32B which adjust the amounts of gas supplied to the adiabatic reactors 31A to 31C; gas discharge lines l21 to l25 which discharge processing gas; and second gas flow rate control unit 33A and 33B which adjust flow rates of processing gas 38A-1, 38A-2, 38B-1, and 38B-2.
摘要:
Energy-efficient gasification-based multi-generation apparatus, facilities, or systems, and methods of modifying existing gasification-based multi-generation apparatus and the various conventional thermal coupling arrangements, are provided. An exemplary gasification-based multi-generation apparatus includes a gasification system configured to generate the raw syngas feed from a carbon-based feedstock. The gasification system includes a gasification plant or facility, a sour water stripping plant or facility comprising a sour water stripper, a gasification reactor, and a gasification system energy management system. The gasification system energy management system comprises a third gasification system process-to-process heat exchanger unit positioned to receive a wastewater bottom stream from the sour water stripper and to receive at least a portion of an oxygen feed to the gasification reactor to provide heat energy to the at least a second portion of the oxygen feed to the gasification reactor and to cool the wastewater bottom stream from the sour water stripper. The sour water stripping plant or facility is integrated into the gasification plant or facility through at least the wastewater bottom stream from the sour water stripper.
摘要:
Energy-efficient gasification-based multi-generation apparatus, facilities, or systems, and methods of modifying existing gasification-based multi-generation apparatus and the various conventional thermal coupling arrangements, are provided. An exemplary gasification-based multi-generation apparatus includes a gasification system configured to generate raw syngas feed from a carbon-based feedstock, and an acid gas removal system configured to remove acidic contaminants from the raw syngas feed to thereby provide a treated syngas feed. The gasification system includes a gasification reactor, a syngas fluid cooler reactor, and a soot ash removal unit comprising a soot quench column, a soot separator, a soot filter, a soot scrubber, and a gasification system energy management system having a conventional set of heat exchanger unit and an added set of heat exchanger units to enhance energy efficiency. The acid gas removal system includes a reactor, an acid gas contaminant absorber, a solvent regenerator, and an acid gas removal system energy management system having a conventional set of heat exchanger unit and an added set of heat exchanger units to enhance energy efficiency.
摘要:
Processes for producing high biogenic concentration Fischer-Tropsch liquids derived from the organic fraction of municipal solid wastes (MSW) feedstock that contains a relatively high concentration of biogenic carbon (derived from plants) and a relatively low concentration of non-biogenic carbon (derived from fossil sources) wherein the biogenic content of the Fischer-Tropsch liquids is the same as the biogenic content of the feedstock.
摘要:
Present embodiments include systems and methods for reducing variations in a solid feed provided to a gasifier. For example, in an embodiment, a gasification feed vessel includes a solid fuel inlet configured to receive a solid fuel into the gasification feed vessel, a dry mixer configured to dry mix the solid fuel within the feed vessel, a solid fuel outlet configured to deliver a feed of the solid fuel to a gasification system, and a metering device coupled to the solid fuel outlet. The metering device is configured to control an amount of the feed of the solid fuel delivered to the gasification system. The gasification feed vessel is configured to provide the feed of the solid fuel to the gasification system within a desired energy concentration range over time.