New Technology for Comprehensive Utilization of Coke Oven Gas in Shaanxi ** Chao Development
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Shaanxi Jinchao Investment Co., Ltd. has developed a new technology for the comprehensive utilization of coke oven gas. Using coke oven gas as raw material, and through processes of cracking and advanced purification, this technology is used to produce clean fuel oil, high-purity paraffin, and other chemical products. 100 million cubic meters of coke oven gas can be used to produce 9,000 tons of 0# diesel and 13,500 tons of high-purity paraffin. According to Hu Hongjun, the company’s general manager, at the end of 2006 the company invested 100 million yuan to build an industrial-scale experimental facility for the comprehensive utilization of coke oven gas in Baoji, Shaanxi. For every ton of product produced, 8 tons of clean water are generated as a by-product. Yu Zhengrong, advisory director to the general manager of Shanghai Chemical Engineering Design Institute Co., Ltd., said that the technology developed by Jinchao Company for producing clean fuel oil from coke oven gas offers higher economic benefits compared to the production of methanol and synthetic ammonia. It is estimated that a coking plant with an annual production capacity of 1 million tons of coke generates 200 million cubic meters of coke oven gas as a by-product; this gas can be used to produce 100,000 tons of methanol per year. The investment required is around 250 million yuan, while the annual output value amounts to 330 million yuan ； With the same 200 million cubic meters of coke oven gas, Jinchao Company’s technology can enable the annual production of 18,000 tons of 0# diesel and 27,000 tons of high-purity paraffin, generating an annual output value of 480 million yuan; the investment required is only 230 million yuan. Currently, Jinchao Company is in talks with several domestic coking enterprises to establish the first industrial demonstration project.
The above is the information I saw in the Coal Chemicals Monthly Report; I am very interested in this technology. But how high is the feasibility?
Doubts are expressed regarding the production of 1 ton of product alongside 8 tons of clean water as a by-product
There is serious concern regarding whether the technology is mature enough and what its reliability is like.
The pilot test they conducted in Baoji was for coal-to-oil production; there was no mention of utilizing coke oven gas
The fact that 8 tons of clean water are produced as a by-product per ton of product generated raises doubts; if that’s the case, it would be possible to build another coal chemical plant, allowing for self-sufficiency in water! :L
“Using coke oven gas as raw material, it is synthesized into clean fuel oils, high-purity paraffins, and other chemical products after cracking and advanced purification. The main components of coke oven gas are H2, CH4, and CO; it is estimated that CH4 is converted into CO + H2, which is then used in FT synthesis to produce diesel and paraffin products. The core technology is F-T synthesis, similar to the indirect liquefaction of coal, and its core advantage lies in the low cost of coke oven gas as a raw material.
It is still the maturity of the technology that is questionable; just like with methanol production from coke oven gas today, there are still certain shortcomings in this process!
I have a question: Does steel companies generally purchase coke from coking plants, or do they produce it themselves? Do steel companies produce coking coal in-house to a large extent?
According to analysis, this technology employs a Fischer-Tropsch synthesis process using a fixed-bed reactor, and it belongs to low-temperature Fischer-Tropsch synthesis; the product is primarily diesel fractions. I just don’t understand why it needs to be labeled as coke oven gas – it’s clearly coal that has been converted into synthetic oil through syngas, right? If 8 tons of water are produced per ton of oil, isn’t the waste of hydrogen in coke oven gas enormous? This post was last edited by catsina on 2008-8-14 15:48.]
It is likely that they are relying on the concept of comprehensive resource utilization; since coal-to-oil projects are currently subject to volume limits, requiring output of 3 million tons per year or more, using coke oven gas falls under comprehensive resource utilization and should not be subject to such restrictions. It’s probably a mistake to say that 1 ton of oil produces 8 tons of water.