Process performing methanation on gas synthesized by coal to synthesize substitute natural gas

A technology for replacing natural gas and coal to syngas, which is applied in the petroleum industry, gas fuel, fuel and other directions to achieve the effects of reducing reaction energy consumption, reducing reactor load, and avoiding sintering deactivation

Active Publication Date: 2016-12-07
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology does not solve the problem of high bed temperature caused

Method used

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  • Process performing methanation on gas synthesized by coal to synthesize substitute natural gas
  • Process performing methanation on gas synthesized by coal to synthesize substitute natural gas
  • Process performing methanation on gas synthesized by coal to synthesize substitute natural gas

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0038] Example 1

[0039] First, the catalysts used in reactors R1 and R2 are prepared. The preparation process is as follows: prepare a nickel nitrate solution with a cation concentration of 0.5g / ml, and add 10-40 mesh γ-Al to it 2 O 3 The carrier powder is immersed for 12 hours under agitation. After the immersion, the suspension is heated and concentrated in a water bath at 60°C, then calcined at 550°C for 6 hours, and ground to 10-40 mesh after roasting. The catalyst preparation steps used in reactors R2, R3, R4, and R5 are the same as above, and the specific parameters are shown in Table 1 and Table 2.

[0040] The catalyst and quartz sand are mixed and packed. The ratio of the filling mass of catalyst and quartz sand in reactors R1 and R2 is 1:0.8, and the ratio of filling mass of catalyst and quartz sand in reactor R3 is 1:0.5. Reactors R4 and R5 are only filled with catalyst.

[0041] The metal active components in the filled catalyst are in an oxidized state and need to b...

Example Embodiment

[0044] Example 2-11

[0045] On the basis of Example 1, Examples 2-11 compared the reactor catalyst bed height to diameter ratio, space velocity, reaction pressure, synthesis gas hydrogen to carbon ratio, synthesis gas distribution ratio, reactor inlet temperature, synthesis gas and steam Molar ratio, reactor outlet temperature, catalyst active component types, active component content, catalyst and quartz sand mass ratio factors have been adjusted, the specific data and results are shown in Table 1, and the catalyst preparation conditions used in the reaction are shown in Table 2. , The composition of raw gas and product gas is shown in Table 3, and the reduction conditions are shown in Table 4. The rest is the same as in Example 1.

[0046]

[0047]

[0048]

[0049] Schedule 3

[0050]

[0051] Schedule 4

[0052]

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PUM

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Abstract

The invention relates to a process performing methanation on gas synthesized by coal to synthesize substitute natural gas. The process is characterized in that catalysts are loaded into methanation reactors R1, R2, R3, R4 and R5, reduction pretreatment is performed, and the methanation reaction is performed by parallelly connecting the reactors R1 and R2 and then serially connecting the reactors R1 and R2 with the reactors R3, R4 and R5 to obtain the substitute natural gas. The process has the advantages that the temperature of the methanation reactors is controlled effectively, the process does not need gas circulation, and power consumption and corresponding energy consumption of the reaction process are lowered greatly.

Description

technical field [0001] The invention belongs to a process for synthesizing coal-based synthesis gas through methanation to synthesize substitute natural gas. Background technique [0002] Methane is an important fuel and chemical intermediate, which can be used in the synthesis of various compounds such as ethylene, acetylene, and formaldehyde. In recent years, with the rapid increase in the demand for natural gas in my country, the gap between the supply and demand of domestic natural gas resources has gradually increased. Using coal-to-synthesis gas as raw material and producing substitute natural gas through methanation reaction is an effective way to improve domestic natural gas supply. Methanation is the core technology of coal-to-natural gas, the reaction refers to CO or CO 2 Synthesis of CH by hydrogenation under the action of catalyst 4 and H 2 O, the reaction formula is as follows: [0003] CO+3H 2 =CH 4 +H 2 O+206KJ / mol (1) [0004] CO 2 +4H 2 =CH 4 +2H...

Claims

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Application Information

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IPC IPC(8): C10L3/08
CPCC10L3/08
Inventor 吉可明刘平张侃荀家瑶田艳青
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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