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

A technology for synthesizing natural gas and coke oven gas, which is applied in the petroleum industry, gas fuel, fuel, etc., can solve the problems of insufficient utilization of hydrogen, high investment, high operating costs, and low utilization of hydrogen resources, so as to prevent sulfur poisoning and improve Recovering waste heat and strong heat removal ability

Active Publication Date: 2010-09-01
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 th

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Example Embodiment

[0037] Example 1

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

[0039] After the conventional purification method (refers to the de-tar, crude desulfurization, de-ammonia, washing benzene debenzene, final de-naphthalene, etc., the same below), the coke oven gas is mixed with the carbon supplement gas, and the mixed gas composition (v% ): H 2 54.04, 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 O 0.12, H 2 S25ppm, COS 12ppm; after the gas temperature reaches 250℃ after heat exchange, it enters the Co-Mo hydrogenation reactor, where it enters the Co-Mo hydrogenation catalyst (active component: CoO 3~4%wt, MoO 3 11~13%wt, the rest is carrier γ-Al 2 O 3 ) Under the action of converting organic sulfur into inorganic sulfur, while hydrogenating unsaturated hydrocarbons into alkanes, a small amount of O 2 With H 2 It reacts (forms water) an...

Example Embodiment

[0042] Example 2

[0043] The process method for preparing synthetic natural gas using coke oven gas in this embodiment is as follows, and the process 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; after the gas temperature reaches 255℃ after heat exchange, it enters the Co-Mo hydrogenation reactor, where it enters the Co-Mo hydrogenation catalyst (active component: CoO 3~4%wt, MoO 3 11~13%wt, the rest is carrier γ-Al 2 O 3 ) Under the action of converting organic sulfur into inorganic sulfur, while hydrogenating unsaturated hydrocarbons into alkanes, a small amount of O 2 With H 2 The reaction (formation of water) and the completion of partial methanation, and then enter the desulfurization reactor to remove inorganic sulfur under ...

Example Embodiment

[0046] Example 3

[0047] The process method for preparing synthetic natural gas using coke oven gas in this embodiment is as follows, and the process 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 enters the Co-Mo hydrogenation reactor at a temperature of 250°C after heat exchange, where it enters the Co-Mo hydrogenation catalyst (active component: CoO 3~4%wt, MoO 3 11~13%wt, the rest is carrier γ-Al 2 O 3 ) Under the action of converting organic sulfur into inorganic sulfur, while hydrogenating unsaturated hydrocarbons into alkanes, a small amount of O 2 With H 2 Reaction (formation of water) and completion of partial methanation, and then enters the desulfurization reactor to remove inorganic sulfur under the action of iron manganese desulfurizer. The pressure of the hydrodesulfuri...

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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 is a new field of comprehensive utilization of coke oven gas, in particular relates to a new process for comprehensive utilization of coke oven gas to synthesize natural 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 lack of natural gas 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 gas 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 composition produ...

Claims

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Application Information

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IPC IPC(8): C10L3/08
Inventor 吕仲明熊世平张结喜
Owner NANJING GOODCHINA CHEM TECH
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