Novel process for making synthetic natural gas by using coke-oven gas

A technology for synthesizing natural gas and coke oven gas

Active Publication Date: 2012-11-28
NANJING GOODCHINA CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] At present, some patents for efficient application of coke oven gas have made many efforts and attempts. CN191985A and CN101391935A disclose a method for utilizing coke oven gas to synthesize natural gas (or methane). 2 and H 2 The reaction produces CH 4 , and then purified by PSA to obtain qualified synthetic natural gas, but this method cannot make full use of the hydrogen in the coke oven gas
CN101100622A discloses a method and device for producing synthetic natural gas by using coke oven gas. The method fully utilizes the hydrogen in the coke oven gas by supplementing carbon, but the method cannot fully utilize CO 2 converted to CH 4 , the gas after the reaction needs to be purified by low-temperature methanol washing or PAS equipment, and its investment and operation costs are relatively high
Therefore, the present invention proposes a new process for rational utilization of coke oven gas in view of the shortcomings of low hydrogen resource utilization, high equipment investment, and poor economic benefits in the above-mentioned method for preparing natural gas from coke oven gas

Method used

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  • Novel process for making synthetic natural gas by using coke-oven gas

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Embodiment 1

[0038] The process method for preparing synthetic natural gas using coke oven gas in the present embodiment is as follows, and the schematic flow diagram is shown in figure 1 .

[0039] The coke oven gas treated by conventional purification methods (referring to the treatment of detar, crude desulfurization, deamination, benzene debenzene removal, final naphthalene removal, etc., the same below) is mixed with carbon supplementary gas, and the mixed gas composition (v% ): H 2 54.04, CO 13.14, CO 23.07, CH 4 24.22, C 2 H 4 2.10, N 2 3.03, O 2 0.28, H 2 O 0.12, H 2 S25ppm, COS 12ppm; the gas temperature reaches 250℃ after heat exchange and enters the Co-Mo hydrogenation reactor. 3 11~13%wt, the rest is carrier γ-Al 2 O 3 ) converts organic sulfur into inorganic sulfur, and at the same time hydrogenates unsaturated hydrocarbons into alkanes, a small amount of O 2 with H 2 It reacts (produces water) and completes partial methanation, and then enters the desulfuri...

Embodiment 2

[0043] The process method for preparing synthetic natural gas using coke oven gas in the present embodiment is as follows, and the schematic flow diagram is shown in figure 1 .

[0044] The coke oven gas treated by the conventional purification method is mixed with the carbon supplement gas, and the mixed gas composition (v%): H 2 54.05, CO 13.14, CO 2 3.07, CH 4 24.22, C 2 H 4 2.10, N 2 3.03, O 2 0.28, H 2 O0.11, H 2 S 25ppm, COS 12ppm; the gas temperature reaches 255 ℃ after heat exchange and enters the Co-Mo hydrogenation reactor, where the Co-Mo hydrogenation conversion catalyst (active components: CoO 3~4%wt, MoO 3 11~13%wt, the rest is carrier γ-Al 2 O 3 ) converts organic sulfur into inorganic sulfur, and at the same time hydrogenates unsaturated hydrocarbons into alkanes, a small amount of O 2 with H 2 It reacts (produces water) and completes partial methanation, and then enters the desulfurization reactor to remove inorganic sulfur under the action ...

Embodiment 3

[0047] The process method for preparing synthetic natural gas using coke oven gas in the present embodiment is as follows, and the schematic flow diagram is shown in figure 2 .

[0048] Coke oven gas treated by conventional purification methods, gas composition (v%): H 2 58.72, CO 7.29, CO 2 2.30, CH 4 25.56, C 2 H 4 2.10, N 2 3.50, O 2 0.40, H 2 O 0.13, H 2 S 53ppm, COS 27ppm: the gas temperature reaches 250 ℃ after heat exchange and enters the Co-Mo hydrogenation reactor, where the Co-Mo hydrogenation conversion catalyst (active components: CoO 3~4%wt, MoO 3 11~13%wt, the rest is carrier γ-Al 2 O 3 ) converts organic sulfur into inorganic sulfur, and at the same time hydrogenates unsaturated hydrocarbons into alkanes, a small amount of O2 with H 2 It reacts (produces water) and completes partial methanation, and then enters the desulfurization reactor to remove inorganic sulfur under the action of iron-manganese desulfurizer. Gas composition (v%): H 2 56....

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Abstract

The invention belongs to the field of the comprehensive utilization of coke-oven gas, and discloses a novel process for making synthetic natural gas by using the coke-oven gas. The qualified synthetic natural gas product is produced by the process comprising the steps of hydrodesulfurization, carbon compensation, multi-level methanation, cooling, separation and the like. The process can effectively prevent the temperature runaway phenomenon of a methanation reactor, can reasonably distribute the load of the methanation reactor, improves the conversion rate of CO and CO2, and provides a new method for making the synthetic natural gas by using the coke-oven gas.

Description

technical field [0001] The invention belongs to a new field of comprehensive utilization of coke oven gas, and particularly relates to a new process for comprehensive utilization of synthetic natural gas from coke oven gas. Background technique [0002] Synthetic natural gas technology, its methanation reaction is: [0003] CO+3H 2 =CH 4 +H 2 O(g) [0004] CO 2 +4H 2 =CH 4 +2H 2 O(g) [0005] It is an effective supplementary channel to solve the current shortage of natural gas in my country, especially to solve the problem of natural gas shortage in remote areas of my country. At present, the raw material gas for synthetic natural gas mainly comes from coal gasification units. The basic composition of the gases produced by various large-scale coal gasification processes is shown in Table 1. Through a series of units such as transformation, purification, and synthesis, synthetic natural gas products are finally obtained. Its features: [0006] (1) In the gas co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L3/08
Inventor 吕仲明熊世平张结喜
Owner NANJING GOODCHINA CHEM TECH
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