Method for purifying synthesis gas from methanol cracking

A methanol cracking and synthesis gas technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of reducing catalyst performance, weakening the reactivity of CO hydrogenation catalysts, etc., and achieves simple, easy-to-operate and applicable methods wide range of effects

Inactive Publication Date: 2005-01-26
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are traces of hydrogen sulfide, water, methanol and other impurities in the methanol cracking synthesis gas, which weakens the reactivity of the CO hydrogenation catalyst and reduces the performance of the catalyst, so it is necessary to purify the methanol cracking gas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The synthetic gas raw material gas from methanol cracking is sent to the desulfurization furnace, at 200°C, 2.5MPa, 2000h -1 Removal of H with ZnO under the condition 2 S. After passing through the desulfurization furnace, the H in the raw gas 2 The content of S is refined from the initial 0.22% to 1ppm. Then desulfurize the gas at 0°C, 2.5MPa, 2000h -1 Under the conditions, use a mixture of 5A molecular sieve and blue gum with a ratio of 4:1 to adsorb and remove water, methanol, etc. After the physical adsorption of molecular sieve and silica gel mixture, the water in the gas is reduced from the initial 1.1% to 0.03ppm, and the methanol is reduced from the initial 0.3% to 0.03ppm. Send the above purified gas directly into the reaction system, at 220°C, 2.0MPa, 1000h -1 20%Co / SiO 2 Catalyst Fischer-Tropsch synthesis.

Embodiment 2

[0020] As described in Example 1, the methanol cracking synthesis gas raw material gas is sent to the desulfurization furnace, at 220 ° C, 5 MPa, 3000h -1 Removal of H with ZnO under the condition 2 S. Then desulfurize the gas at 20°C, 5MPa, 3000h -1 Under the conditions, use a mixture of 5A molecular sieve and blue gum with a ratio of 2:1 to adsorb and remove water, methanol, etc. Then the purified gas is directly sent to the reaction system, at 280°C, 3.0MPa, 2000h -1 100Fe-12Cu-0.5K-30SiO 2 Catalyst Fischer-Tropsch synthesis.

Embodiment 3

[0026] As described in Example 1, the methanol cracking synthesis gas raw material gas is sent to the desulfurization furnace, at 230 ° C, 10MPa, 10000h -1 Removal of H with ZnO under the condition 2 S. Then desulfurize the gas at 40°C, 10MPa, 10000h -1 Under certain conditions, use blue gum to adsorb and remove water, methanol, etc. Then the purified gas is directly sent to the reaction system, at 320°C, 8.0MPa, 5000h -1 1Cu-0.2Ni-0.5Mn-2ZrO 2 Catalyst for the synthesis of low carbon alcohols.

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PUM

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Abstract

The invention provides a method for purifying synthesis gas from methanol cracking consists of, subjecting methanol cleavage synthesis raw material gas to 200-250 deg. C, 2.5-10 MPa, 2000-10000h#+[-1], removing H2S using ZnO as catalyst, then removing water and methanol through adsorbing with 5A molecular screen and mixture having a blue glue ration of 0-4:1.

Description

Technical field: [0001] The invention belongs to a method for purifying raw gas, in particular to a method for purifying synthesis gas from methanol cracking. Background technique: [0002] The research on synthesizing some chemical raw materials and fuels from syngas can be traced back to the beginning of last century. In 1902, P. Sakatler first reported that CO hydrogenation can be converted into methane. In 1926, F.Fischer and H.Tropsch reported CO / H 2 Hydrocarbons and oxygenates with a wide range of molecular weights can be produced by catalytic conversion, which is known as Fischer-Tropsch synthesis. The direct synthesis of low-carbon alcohols from synthesis gas also began in 1920. In syngas CO+H 2 In the reaction, the main technical routes include hydrocarbon synthesis and alcohol synthesis. Among them, the target products of hydrocarbon synthesis include liquid fuels including gasoline and diesel oil, low-carbon olefins such as ethylene, propylene, and isobutene ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/32
Inventor 孙予罕周玮陈建刚
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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