New process for producing firedamp by syngas

A synthesis gas and coal-based synthesis gas technology, which is applied in the chemical industry, climate sustainability, sustainable manufacturing/processing, etc., can solve problems such as economic loss, harsh process conditions, and insufficient energy utilization, so as to improve economic benefits , strong competitive advantage, effective use of energy

Active Publication Date: 2013-01-02
ENN XINNENG BEIJING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, the process of producing methane from syngas is very mature, but they all have more or less problems such as not making full use of energy, causing certain economic losses, high cost, and harsh process conditions.

Method used

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  • New process for producing firedamp by syngas
  • New process for producing firedamp by syngas
  • New process for producing firedamp by syngas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] To produce 200,000 tons / year of methanol, low-temperature catalytic gasification crude gas is rich in methane 20.0%, using a certain amount of cobalt phthalocyanine and containing 0.5mol / LNa 2 CO 3 Desulfurization in alkaline solution, the H in the gas 2 S off to below 40ppm. After adjusting the ratio of hydrogen to carbon through the full low shift process of 0.8MPa, it enters the decarburization system with a pressure of 2.70MPa for decarburization, and the purified gas is further passed through Co-Mo / γ-Al 2 o 3 Catalyst hydroconversion and zinc oxide refined desulfurization enter into methanol synthesis, with a daily output of 667 tons of methanol and 16,000Nm 3 / h Relax gas.

[0046] The composition of low temperature catalytic gasification crude gas is as follows:

[0047]

[0048] The relaxed gas consists of:

[0049]

[0050] The release gas from methanol synthesis passes through the methanation system with a pressure of 1.0MPa, a temperature of 200-3...

Embodiment 2

[0054] Texaco gasification synthesis gas production is 100,000Nm 3 / d, the composition contains 0.1% methane, and the synthesis gas enters the sulfur-tolerant shift reactor. The sulfur-tolerant shift catalyst generally uses a Co-Mo sulfur-tolerant catalyst, and the H 2 / CO is in the appropriate ratio range of 3.05. The converted gas is cooled to about -27°C by the ammonia cooler, and the condensate is separated. The gas enters the low-temperature methanol elution sulfur decarburization tower. The reaction pressure is 3~8MPa and the temperature is -20~— 60°C, remove acid gas. Then directly enter the methanation system, the pressure is 10.0MPa, the temperature is 300-350℃, and the space velocity is 8000-12000h -1 , so that CO and H 2 Synthesize methane, the product gas pressure after methane synthesis is 10.0MPa. According to the description in the national standard GB / T18047-2000, the high calorific value of CNG is ≥31.4MJ / m 3 , the product complies with the national standa...

Embodiment 3

[0060] Syngas production of 150,000Nm 3 / d, the composition contains 28.5% methane, using a certain amount of cobalt phthalocyanine and containing 0.5mol / LNa 2 CO 3 The solution is desulfurized, and the H in the gas 2 S off to below 40ppm. After adjusting the ratio of hydrogen to carbon through the full low conversion process of 0.8MPa, it enters the decarburization system with a pressure of 2.70MPa, and the purified gas is further passed through Co-Mo / γ-Al 2 o 3 Catalyst hydrogenation conversion and zinc oxide fine desulfurization enter the methanation system, the pressure is 20.0MPa, the temperature is 350-400℃, and the space velocity is 9000-12500h -1 , so that CO and H 2 Synthesize methane, the product gas pressure after methane synthesis is 20.0MPa. According to the description in the national standard GB / T18047-2000, the high calorific value of CNG is ≥31.4MJ / m 3 , the product complies with the national standard GB / T18047-2000, this gas can The CNG production un...

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Abstract

The invention provides a new process for producing firedamp by syngas. The technology is characterized in that: by the purge gas or coal-based syngas of the firedamp, an internal heating / cooling heat-exchanging reactor is adopted to synthesize the firedamp by a deep firedamp catalyst; simultaneously, the firedamp in the raw material gas is recovered and utilized. The firedamp product recovers theenergy by multi-level heat exchanging; and any one firedamp process can be started flexibly according to the purity requirement of the product.

Description

technical field [0001] The invention relates to the field of methanation of carbon oxides, in particular to a new process for producing methane from syngas. Background technique [0002] Methanation technology was first applied in ammonia synthesis process to remove CO and CO in raw gas 2 In the 1940s, foreign countries attached great importance to the research on methanation to produce qualified natural gas and city gas technology. In the early 1970s, research was carried out at home and abroad to produce alternative natural gas from coal and naphtha, and a series of technological processes were developed. . In recent years, due to the continuous improvement of methanation catalysts, the process has become more perfect. [0003] The patent US4130575 applied by the Danish Tops φe company adopts multiple reactors connected in series. These reactors are all adiabatic reactors, and the content of each component of the imported material in the first methanation reactor is adju...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C9/04C07C1/04
CPCY02P20/10
Inventor 常俊石李金来张建祥郭迎秋刘雪飞张彦洲
Owner ENN XINNENG BEIJING TECH
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