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Natural gas-carbon dioxide dry reforming synthesis gas process

A carbon dioxide, natural gas technology, applied in inorganic chemistry, chemical instruments and methods, hydrogen and other directions, can solve problems such as excessive steam, and achieve the effect of reducing raw material consumption, reducing raw material cost, and high raw material utilization efficiency

Active Publication Date: 2019-05-28
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect that too much steam needs to be used in the production of synthesis gas by natural gas steam reforming, and at the same time overcome the defect of using air separation equipment for the production of synthesis gas by partial oxidation of natural gas, and provide a natural gas-carbon dioxide dry reforming synthesis gas craft

Method used

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  • Natural gas-carbon dioxide dry reforming synthesis gas process
  • Natural gas-carbon dioxide dry reforming synthesis gas process

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Effect test

Embodiment 1

[0024] Process description: 20000Nm from pipe network 3 / h industrial natural gas (CH 4 98%, the balance is a small amount of C 2 、C 3 , N 2 ), after the compressor is boosted to 0.5MPa, firstly through hydrodesulfurization, the hydrogenation saturation of a small amount of olefins and the hydrogenation of sulfur compounds are completed in the range of 320-350 °C, and then through the zinc oxide desulfurizer to remove sulfur compounds to avoid subsequent Reforming catalyst poisoning.

[0025] The purified natural gas and steam are mixed into the pre-reforming reactor to control the H 2 The O / C is 0.6 (water distribution 9.4t / h), the inlet temperature is 650°C, and the pressure is 0.45MPa. The natural gas pre-reforming reaction is completed here. The temperature of the process gas after the reaction is 450°C, the pressure is 0.4MPa, and the flow rate is 34000Nm 3 / h, dry basis components are: CO 0.35%, H 2 20.6%, CO 2 4.9%, CH 4 74.1%. Subsequently, the process under...

Embodiment 2

[0029] Process description: 20000Nm from pipe network 3 / h industrial natural gas (CH 4 98%, the balance is a small amount of C 2 、C 3 , N 2 ), after the compressor is boosted to 0.5MPa, firstly through hydrodesulfurization, the hydrogenation saturation of a small amount of olefins and the hydrogenation of sulfur compounds are completed in the range of 320-350 °C, and then through the zinc oxide desulfurizer to remove sulfur compounds to avoid subsequent Reforming catalyst poisoning.

[0030] The purified natural gas and steam are mixed into the pre-reforming reactor to control the H 2 The O / C is 2.0 (water distribution 31.5t / h), the inlet temperature is 500°C, and the pressure is 0.45MPa. The natural gas pre-reforming reaction is completed here. The temperature of the process gas after the reaction is 380°C, the pressure is 0.4MPa, and the flow rate is 58600Nm 3 / h, dry basis components are: CO 0.06%, H 2 22.7%, CO 2 5.6%, CH 4 71.5%. Subsequently, the process unde...

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Abstract

The invention relates to natural gas chemical engineering and synthesis gas production processes and especially provides a natural gas-CO2 dry-reforming synthesis gas production process that includes the following steps: 1) adiabatic conversion of natural gas and vapor: mixing cleaned natural gas and water vapor and feeding the mixed gas into a pre-conversion reactor to produce process gas; 2) methane-CO2 dry-reforming: mixing the process gas with CO2 and feeding the mixed gas into a reforming reactor. In the process, CO2 in the natural gas raw material is unnecessary to separate before, so that the process has strong capability of adapting the raw materials, is low in consumption of the raw material and equipment, is low in equipment investment and is further reduced in production cost.

Description

technical field [0001] The invention relates to a natural gas chemical industry and synthesis gas production process, in particular to a natural gas-carbon dioxide dry reforming synthesis gas production process. Background technique [0002] At present, the processes for producing synthesis gas from natural gas include steam reforming of natural gas, partial oxidation of natural gas, and reforming of natural gas-carbon dioxide. The steam reforming of natural gas requires a high water-to-carbon ratio, and the obtained process gas contains high hydrogen content, low carbon monoxide content, and H 2 / CO is usually greater than 3. Partial oxidation of natural gas can usually obtain H 2 The process gas with / CO is 2, but partial oxidation requires air separation to provide oxygen, and the production cost is high. Natural gas - carbon dioxide dry reforming can obtain H 2 The process gas with / CO about 1 is very suitable for F-T synthesis and oxo synthesis. [0003] At present...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/38
Inventor 王昊梁卫忠薛红霞姜建波郭建学张英魁徐宝民王玲真张跃华李丕刚牟立杰张波
Owner CHINA PETROLEUM & CHEM CORP