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

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...

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, high energy consumption, and large investment

However, due to the relatively low porosity and specific surface area of ​​the nickel foam catalyst, the methane conversion rate is also relatively low