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Method and device for preparing synthetic gas

A synthesis gas and flue gas technology, applied in hydrogen/synthesis gas production, chemical instruments and methods, gas fuel, etc., can solve the problem of limited heat transfer and achieve the effect of easy replacement

Inactive Publication Date: 2004-05-19
HALDOR TOPSOE AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Even so, if the length of the reformer tube is kept within a reasonable length, the amount of heat that can be transferred is relatively limited

Method used

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  • Method and device for preparing synthetic gas
  • Method and device for preparing synthetic gas

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Experimental program
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Effect test

Embodiment 1

[0060] The amount of catalyst required in the process of the invention was compared with the conventional process.

[0061] The traditional process is accomplished by feeding hydrocarbons and steam to a pre-reformer, followed by heating it in the coils of the tubular reformer containing the waste heat portion of the flue gas. First, the feed is heated before it passes through a first adiabatic reactor containing steam reforming catalyst particles. Next, the mixture is reheated and reacted again, repeating the number of reheating and reaction steps until four reheating steps and four reaction steps have been completed simultaneously.

[0062] In the process of the invention, a feed consisting of hydrocarbons and steam is fed to the pre-reformer, which is then passed through a system of pipes in the waste heat section of the tubular reformer containing the flue gas. First, the feed is heated before it passes through a first insulated header system containing catalytic constitue...

Embodiment 2

[0067] This embodiment is based on the system described in Figures 1 and 2 without the addition of CO 2 . A waste heat boiler is installed in the flue gas section of the converter, which is required for overall high energy efficiency by recovering heat enthalpy in the flue gas.

[0068] The numbers in Table 2 represent the substantial savings that can be obtained using the method of the present invention.

[0069] Table 2

[0070] traditional method

[0071] The results show that the power required for the converter is much lower in the process of the present invention. Smaller converters can therefore be used in the process of the invention. In addition to the reduced flue gas flow rate, the amount of steam produced is also reduced. All in all, substantial savings are realized.

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Abstract

Process and apparatus for the preparation of synthesis gas by catalytic steam and / or CO2 reforming of a hydrocarbon feedstock comprising the following steps: (a) heating the reaction mixture of hydrocarbon feedstock and steam and / or CO2 in the flue gas containing waste heat section from the fired tubular reformer (b) adiabatic reforming of the reaction mixture outside the waste heat section by contact with a solid reforming catalyst (c) repeating steps (a) and (b) until the desired reaction mixture composition and temperature is reached (d) feeding the reaction mixture to the fired tubular reformer and further reforming the mixture to the desired composition and temperature, wherein the adiabatic reforming of the reaction mixture is conducted in the process gas piping system in the flue gas-containing waste heat section, the piping system having adiabatic zones outside the heating section and containing solid reforming catalysts comprising one or more catalyzed structured elements.

Description

technical field [0001] The present invention relates to a method and an apparatus for producing synthesis gas. The production process involves catalytic vapor and / or carbon dioxide conversion of a hydrocarbon feedstock. In particular, the present invention provides an improved process of the type described above, comprising the steps of heated steam reforming by contacting a hydrocarbon vapor mixture with a catalytic structure active in steam reforming; past effluent. Background technique [0002] It is well known in the art that partial steam reforming upstream of a combustion steam reformer in the production of synthesis gas takes place as a pre-reforming of hydrocarbon feedstock. Prereforming is typically used for hydrocarbon feedstocks containing higher hydrocarbons, or for increasing the capacity of existing converter plants. At a temperature of about 450°C to 550°C, the hydrocarbon feedstock and steam and / or CO 2 The process gas is introduced into the pre-reformer....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/08C01B3/38
CPCC01B2203/1035C01B2203/142C01B2203/1011C01B2203/0816C01B3/384C01B2203/1023C01B3/382C01B2203/0233Y02P20/129C10L3/08
Inventor T·罗斯楚普-尼尔森N·埃里克斯楚普P·S·克里斯滕森K·阿尔斯伯格-彼得森J·-H·B·汉森I·迪布杰尔
Owner HALDOR TOPSOE AS