Method of preparing synthetic gas by partly oxygenating of natural gas under large airspeed

A technology for natural gas and synthesis gas, applied in chemical instruments and methods, inorganic chemistry, bulk chemical production, etc., can solve the problems of low porosity and specific surface area, low methane conversion rate, strong endothermic reaction, etc. The effect of living, small size and high production capacity

Inactive Publication Date: 2009-08-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantages of this process are: strong endothermic reaction; and in order to prevent carbon deposition on the catalyst, it is necessary to use a high water-carbon ratio, hig...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0013] 4.0 grams of P123 (polyethylene oxide-polypropylene oxide-polyethylene oxide triblock polymer surfactant) was dissolved in 144 grams of distilled water, and 7.9 grams of hydrochloric acid with a concentration of 35% (mass) was added. After stirring for 0.5 hour at 35° C. with a rotational speed of 700 rpm, 4.0 g of n-butanol was added immediately. Immediately after stirring was continued for 1.0 hour, 8.6 grams of ethyl orthosilicate was added. The solution was stirred for 24 hours at 35°C at 1400 rpm. Then, the solution was placed in a closed polypropylene container, and stood at 100° C. for 24 hours to obtain a white precipitate, which was directly heated and filtered without washing to obtain a filter cake. Dry in air at 100° C. for 24 hours, wash with ethanol / hydrochloric acid mixed solution with a volume ratio of 2:1 to obtain white particles. After natural drying, put it into a muffle furnace, raise the temperature from 20°C to 550°C at a rate of 10°C / min, and c...

example 2

[0017] The catalyst prepared in Example 1 is used for the reaction of partial oxidation of natural gas to synthesis gas at a large space velocity, when the amount of catalyst is 0.13cm 3 , at an airspeed of 2×10 4 h -1 、CH 4 / O 2 Under the conditions of 2:1 and reaction temperature of 800°C, CH 4 The conversion rate of H 2 The selectivity of CO is 93.5%, and the selectivity of CO is 88.6%.

example 3

[0019] The catalyst prepared in Example 1 is used for the reaction of partial oxidation of natural gas to synthesis gas at a large space velocity, when the amount of catalyst is 0.13cm 3 , at an airspeed of 1×10 5 h -1 、CH 4 / O 2 Under the conditions of 2:1 and reaction temperature of 850°C, CH 4 The conversion rate of H 2 The selectivity of CO is 54.5%, and the selectivity of CO is 69.2%.

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Abstract

The invention discloses a making method of synthetic gas through oxidizing large air-speed part of natural gas, which comprises the following steps: loading nickel nanometer-wire network particle catalyst in the reactor; aerating the composite gas of natural gas and oxygen with the rate of carbon atom number of the natural gas and oxygen molar number at 1. 5-2. 5:1 under 400-900 deg. c at 1X104-5X106h-1 as air speed of the reactor; proceeding partial oxidizing reaction to make the synthetic gas; setting the grain size of the nickel nanometer-wire network particle catalyst at 50-500mum, the aperture of the network hole at 5-30nm, the specific surface area at 9-12m2/g, the void rate at 90-99%; improving the transmitting rate of methane to 95% and the selectivity of hydrogen and carbon monodioxide to 99% and 98% separately because the nickel nanometer-wire network particle catalyst possesses good reacting activity and stability without loss activity easily; making the manufacturing device with small bulk, reduced pressure, simple structure and high manufacturing ability.

Description

technical field [0001] The invention relates to a method for preparing synthesis gas by partial oxidation of natural gas at high space velocity, and belongs to the technical field of synthesis gas preparation. Background technique [0002] As the world's oil resources are decreasing day by day, the development and utilization of natural gas have been paid more and more attention by people. The chemical utilization of natural gas can be divided into two basic ways: direct conversion method and indirect conversion method. The main component of natural gas is methane, but since the methane molecule is very stable in structure, it is difficult to use it directly, so the utilization of natural gas is mainly carried out through indirect processes, that is, the natural gas is converted into synthesis gas first, and then a large amount of synthetic gas is produced from the synthesis gas Chemicals, such as synthetic ammonia, methanol, hydrocarbons, etc. At present, the steam cataly...

Claims

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Application Information

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IPC IPC(8): C01B3/36C01B3/40B01J23/755
CPCY02P20/52
Inventor 王亚权洪学斌
Owner TIANJIN UNIV
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