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Method and apparatus for preparing synthesis gas by natural gas-carbon dioxide reforming

A carbon dioxide and natural gas technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of complicated equipment, difficult heating of the reactor, and carbon deposition on catalysts, and achieve the effect of avoiding potential safety hazards.

Inactive Publication Date: 2009-06-10
SHANGHAI HUAYI ENERGY CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a method and device for preparing synthesis gas by reforming natural gas-carbon dioxide, so as to overcome defects such as difficult heating of reactors in the prior art, cumbersome devices, and carbon deposition on catalysts.

Method used

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  • Method and apparatus for preparing synthesis gas by natural gas-carbon dioxide reforming

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Embodiment 1

[0036] In this embodiment, various reaction components are set with reference to the devices and processes shown in the accompanying drawings.

[0037] Preheat sulfur-containing natural gas and hydrogen at a ratio of 1:0.014 to 200°C and send them to the hydrodesulfurization reactor as a desulfurization unit. The cobalt-molybdenum catalyst and the zinc oxide adsorbent are respectively 200g, and the bed heights are 300mm and 350mm respectively. The reaction temperature is 315°C and the pressure is 0.2Mpa. Desulfurized natural gas (sulfur content 0.7ppm) is preheated together with carbon dioxide gas and water vapor at a ratio of 1:1.4:0.04, and then added from the upper part of the reforming reactor. The reforming reactor is equipped with 300g of nickel-based catalyst, and the bed The height is 300mm, the reaction temperature is 850°C, and the reaction pressure is 0.2MPa. After recombination and synthesis, carbon monoxide and hydrogen are output after heat exchange, cooling and ...

Embodiment 2

[0045] According to the process method of Example 1, the desulfurized natural gas, carbon dioxide gas, and water vapor are preheated together with the ratio of 1:1.2:0.04 and then added from the upper part of the reforming reactor, and the synthesized gas is composed of: H 2 43.9%, CO46.5%, CH 4 1.3%, CO 24.2%, H 2 O4.1%

Embodiment 3

[0047] According to the process method of Example 1, the desulfurized natural gas, carbon dioxide gas, and water vapor are preheated together with the ratio of 1:1.0:0.04 and then added from the upper part of the reforming reactor, and the synthesized gas is composed of: H 2 47.3%, CO 46.0%, CH 4 1.7%, CO 2 2.3%, H 2 O2.7%

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Abstract

The invention provides a method and a device for preparing syngas by reforming natural gas and carbon dioxide. The method comprises the following steps: sulfur-containing natural gas with the concentration of at least 99.0 mol percent and hydrogen are premixed, preheated, and sent into a hydrodesulphurization reactor as a desulphurization unit; the sulfur content of the natural gas is lowered through the hydrogenation and adsorption of a catalyst; and the syngas is obtained in a reforming reactor provided with a reforming nickel catalyst after the natural gas and carbon dioxide are premixed and preheated. The method and the special device thereof are applicable to the comprehensive utilization of natural gas and carbon dioxide.

Description

technical field [0001] The invention belongs to the field of carbon-chemical industry, and relates to a method and a device for preparing synthesis gas by reforming natural gas-carbon dioxide. Background technique [0002] Natural gas is not only a high-quality clean energy, but also an important raw material for the modern chemical industry. However, since natural gas is generally produced far away from the place of use, and has a low energy density, high-temperature combustion will also release a large amount of NOx. The development of this natural gas Utilization is very limited. On the other hand, from an environmental point of view, both natural gas and carbon dioxide are harmful "greenhouse gases". Therefore, it is necessary to find an effective way to realize the comprehensive utilization of natural gas and carbon dioxide. [0003] At present, there are three ways to produce synthesis gas from natural gas: steam reforming of methane, catalytic partial oxidation refor...

Claims

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Application Information

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IPC IPC(8): C01B3/34
Inventor 廖爱民高贵林霍瑞东王群赖春波
Owner SHANGHAI HUAYI ENERGY CHEM
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