Method for preparing synthesis gas from coke oven gas

Abstract

The invention discloses a method for preparing synthesis gas from coke oven gas. Desulfurized and purified high-temperature carbonization gas is taken as a raw material gas, and oxygen, carbon dioxide and vapor are taken as gas transforming agents; and the method comprises the following steps: preheating the raw material gas and the gas transforming agents, introducing into a reactor for mixing, and simultaneously generating autothermal non-catalytic conversion reaction; and then introducing mixed gas after the non-catalytic conversion reaction into a catalyst bed layer for catalytic reforming reaction to prepare the synthesis gas. In the method, the consumption of the catalyst is low, the conversion rate is high, the ratio of hydrogen to carbon of the synthesis gas has strong controllability, the comprehensive utilization of energy is realized, the coke oven gas and the carbon dioxide are utilized as raw material gases, and the method for preparing the synthesis gas from the coke oven gas is economic, environment-friendly and low-carbon.

Description

technical field [0001] The invention relates to a method for producing synthesis gas from coke oven gas, in particular to a method for producing synthesis gas by reacting coke oven gas, oxygen, carbon dioxide and water vapor. Background technique [0002] Coke oven gas is a by-product produced during the coking process. It usually contains 40-70% hydrogen, 10-30% methane, and a small amount of other gases. Except for a small amount used for furnace combustion and power generation, a large amount of it is directly vented and burned to waste resources. It also pollutes the environment. At the same time, my country's carbon dioxide emissions rank second in the world, which poses a great threat to our living environment. Therefore, rational use of coke oven gas and carbon dioxide has important economic and environmental significance, and meets the requirements of low-carbon economy and sustainable development. [0003] Coke oven gas, oxygen, carbon dioxide, and water vapor are u...

AI Technical Summary

Problems solved by technology

The disadvantage is that the H / C of the raw material gas itself is high, and carbon dioxide is not used as a carbon source, so the H / C of the obtained synthesis gas is relatively high, with an average of 2.7, which is not suitable for the production of methanol and F-T synthesis in industry

Its shortcoming is that the coke oven gas and the gas conversion agent carry out a non-catalytic conversion reaction in the reformer. To make the conversion rate of the reactant high, the reaction temperature must be increased, and the consumption of oxygen must be increased. The reaction temperature When the temperature is too high, it is easy to deposit carbon. In order to reduce carbon deposition, it is necessary to increase the amount of water vapor added, which increases equipment investment and operating costs.

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