On June 15, the first comprehensive energy utilization project of producing ethylene glycol using crude gas in China -- the EPC contract of crude gas comprehensive utilization project with an annual output of 400,000 tons was signed in urumqi. The two parties are China grand auto energy's hami grand auto environmental protection technology co., LTD and China chemical's China wuhuan engineering co., LTD.

Oven Gas, also known as "* Oven Gas" (COG), belongs to high calorific value Gas, crude Gas or crude Gas due to its combustible composition.It is a kind of combustible gas which is produced at the same time when coke and tar products are produced in coke oven after high temperature dry distillation. It is a by-product of coking industry.Coke oven gas is a mixture, and its yield and composition vary according to the quality of coking coal and coking process conditions. Generally, coke oven gas can be produced from 300 -- 350m3 (standard state) per ton of dry coal.Its main ingredient for the hydrogen (55% - 60%) and methane (23% - 27%), and also contains a small amount of carbon monoxide (5% - 8%), C2 above unsaturated hydrocarbon (2% - 4%), carbon dioxide (1.5% - 3%) and oxygen (0.3% - 0.8%)), nitrogen (3% - 7%).Hydrogen, methane, carbon monoxide and unsaturated hydrocarbons above C2 are the combustible components, while carbon dioxide, nitrogen and oxygen are the non-combustible components.Coke oven gas belongs to medium calorific value gas, whose calorific value is 17 -- 19MJ per standard cubic meter.Coke oven gas has a high content of hydrogen and is used to synthesize ammonia after separation. Other components such as methane and ethylene can be used as raw materials for organic synthesis.

The construction site of guanghui glycol project is located in nuo MAO hu industrial park, yiwu county, hami city, xinjiang province, with a total investment of 3.56 billion yuan.Project choosing China rings and hua shuo technology CO., LTD., hebi city, BMW (group) CO., LTD. Jointly developed the "WHB syngas system grade polyester glycol" third generation technology, through the transformation, the transformation, the low temperature methanol washing, PSA, and a series of adsorption separation process, the waste gas in the high value of syngas composition of H2, CO, by carbonylation, hydrogenation, refined technology, production of polyester glycol.

For a long time, the shortage of gas is mainly used for power generation or direct combustion and emptying.This project production 400000 tons/year ethylene glycol, the waste gas in the transformation process of organic sulfur into easy recycling H2S, and through the wet sulfur sulfur recovery unit production, the maximum use of waste gas resources can be achieved, but eventually waste gas resources can be transformed into effective syngas, can direct emissions of about 600000 tons of CO2 a year, indirect emissions of about 1.7 million tons of CO2.

Compared with the current project of producing ethylene glycol from coal to syngas, adopting ethylene glycol from crude gas can save more than 30% of the project construction investment, significantly reduce the production cost of ethylene glycol products, and improve the overall profitability of the project.

Experts said that for many years the domestic and foreign coal chemical industry has been along the coal to oil and gas, coal to olefin, coal to glycol three process route development.Coal to ethanol will become very Chinese characteristics of the four coal chemical route.