Process for preparing synthetic gas by reforming carbon dioxide-methane

A carbon dioxide and synthesis gas technology, applied in inorganic chemistry, chemical instruments and methods, non-metallic elements, etc., can solve problems such as energy waste and environmental pollution

Inactive Publication Date: 2005-08-03
山西中天煤化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0022] Based on the above-mentioned present situation, the present invention is to realize maximum utilization of C resources in natural gas and coke oven gas, and

Method used

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  • Process for preparing synthetic gas by reforming carbon dioxide-methane

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Comparison scheme
Effect test

Embodiment 1

[0031] In this embodiment, iron alloy coke is used as the carbon material 4 . Weigh 8.0 g of the carbon material 4, and put it into the thermal conversion reactor 3 from the top of the fixed-bed thermal conversion reactor made of stainless steel. The bed height is 40cm, the porosity is about 50%, the thermal cracking temperature is 1080°C, and then the CH-rich 4 Gas and CO 2 The raw material gas 5 and the steam 6 from the waste heat boiler 2 mixed in before the thermal conversion reactor 3, (CH 4 :CO 2 : water vapor=1:1:1, flow rate 60.0ml / min), the oxygen 7 supplied from the bottom of the thermal conversion reactor 3 and part of the high-temperature charcoal or part of the combustibles rich in methane gas are burned to provide heat energy to make the heat conversion The temperature of reactor 3 rises to 950°C-1300°C. In thermal conversion reactor 3, high temperature C, H 2 O, O 2 and the H in the methane-enriched gas input to thermal reforming reactor 3 2 、CH 4 , and t...

Embodiment 2

[0036] According to the process of Example 1, metallurgical coke was used as the carbon material 4. Weigh 8.0 g of carbon material, put it into the moving bed thermal conversion reactor 3 made of stainless steel, the bed height is 40 cm, the porosity is about 50%, the thermal cracking temperature is 1080 ° C, and the gas CO 2 、CH 4 and water vapor, CH 4 :CO 2 :H 2 O=1:1:1, flow rate 30.0ml / min, the reaction result is as follows:

[0037] h 2 54.60%, CO 42.90%, CH 4 0.47%, CO 2 2.00%

Embodiment 3

[0039] According to the process of Example 1, anthracite (4% volatile matter) was used as the carbon material 4 . Weigh 8.0 g of carbon material, put it into the fluidized bed thermal conversion reactor 3 made of stainless steel, the bed height is 40 cm, the porosity is about 50%, the thermal cracking temperature is 1080 ° C, and the gas CO 2 、CH 4 and water vapor, CH 4 :CO 2 :H 2 O=1:1:1, flow rate 15.0ml / min, the reaction result is as follows:

[0040] h 2 59.50.00%, CO 38.80%, CH 4 1.20%, CO 2 0.50%

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Abstract

The CO2-CH4 reforming process of preparing synthetic gas includes adding preheated CH4, CO2, water vapor and O2 into high temperature carbon system inside the hot conversion reactor, raising the temperature to over 950 deg.c, and under the presence of H2O and O2, high temperature C, H2, CH4 and CO2 produce chemical reaction to produce synthetic gas, and outputting the synthetic gas after heat exchange to lower temperature. The present invention realizes the reformation and conversion of CO2 and CH4 high temperature carbon system, and has simple technological process, low cost, high heat efficiency and no catalyst deactivation caused by carbon deposit and sulfur. The present invention is suitable for coal gasification.

Description

technical field [0001] The invention relates to a method for preparing synthesis gas, in particular to a process for producing synthesis gas by reforming carbon dioxide and methane. Background technique [0002] Carbon dioxide-methane reforming to synthesis gas can reduce the "greenhouse effect", and gas emissions can also make full use of C 1 resource. At the same time, due to <chemistry num="001"> <chem file="200510012305_cml001.xml" / > < / chemistry> Highly endothermic reaction (ΔH 298 =247KJ / mol) can store solar energy, nuclear energy or its energy in CO and H 2 , so as to achieve energy transfer. Therefore, in recent years, carbon dioxide - methane reforming synthesis gas technology has received widespread attention and in-depth research. [0003] Chinese invention patent (publication number 1089232) disclosed a kind of methane, oxygen and carbon dioxide and water in 1994 as the method for the catalytic production synthesis gas of starting materia...

Claims

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Application Information

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IPC IPC(8): C01B3/36
Inventor 张墨王华庭
Owner 山西中天煤化有限公司
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