Hydrogen production technology and coal chemical industry
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It is well known that CO2 has become a global **problem**, and this issue is particularly severe in China, which has become the largest emitter of CO2. Whether it is **governments or companies, the pressure is evident. If appropriate hydrogen production technologies are available, coal chemical industry can achieve further development. The question is, do we know of any suitable hydrogen production technologies so far? Please feel free to share your thoughts – what do you consider to be the best hydrogen production technology, what is the current progress in that area, and where is it performing best? Wait. Thank you all
Coal is gasified to produce hydrogen, and then CO is converted into CO2; the products derived from CO2 can be sold on the market, thus contributing to emission reduction. (This is a mature technology in China.) The gasification technologies that are well-known at present are mainly those from abroad. Another method is the conversion of coke oven gas into hydrogen, and this is also a mature technology in China. Biohydrogen production is part of bioengineering, but the related technology is not yet fully developed. I’m not sure if what I’m saying is correct.
Right or wrong, thanks for the reply. Too much CO2 is produced during gasification; it’s simply not possible to recover this CO2 and sell it as a product. Moreover, the market for such CO2 is already saturated, with limited demand.
In fact, producing hydrogen from coal allows for the rational utilization of CO2: for the production of methanol and its downstream products； Producing urea ； Producing liquid CO2. The carbon dioxide emitted comes mainly from combustion rather than from the reactor; I recommend that the carbon dioxide produced by combustion be recovered, by absorbing and desorbing it ； Power plants, steel mills, etc. should work closely with chemical plants to make rational use of carbon dioxide and establish a true circular economy.
Thanks for the reply. Synthesizing methanol also produces a large amount of CO2, but of course it’s much better than producing hydrogen purely. So other hydrogen production technologies are needed, :-) Liquid CO2 basically can’t solve this problem; there’s too much of it, haha...
Hydrogenation of coker naphtha primarily uses coke oven gas to produce hydrogen, and the technology is mature
This claim isn’t very scientific; after being sold in the market, the vast majority of CO2 returns to the atmosphere in various forms (for example, it is released when carbonated drinks are exhaled). Moreover, the market simply cannot absorb the large amount of CO2 produced by gasification. Several companies are currently researching CO2 capture technologies aimed at storing it in used oil or underground. But I believe this isn’t a permanent solution either, as there’s no way of knowing when that CO2 might escape again. The most effective approach is to convert CO2 into other chemical products. Of course, planting trees also has benefits: they absorb CO2 and release oxygen, and they can also be used as biomass energy, offering multiple advantages at once.
In fact, the main products of coal chemical processing are H2, CO, and CH4 (these are the ones that are used most commonly nowadays). Whether it’s for hydrogen production, synthesis gas generation, or the creation of downstream products, everything must operate in accordance with market principles. Some applications involve the production of ammonia, methanol, or LNG; there are also many other uses, such as dimethyl ether, with hydrogen being utilized for efficient power generation. As long as thorough market research is conducted, I think technology isn’t a problem in China. As for the liquefaction of CO2, it’s just one aspect of this issue. As the person above mentioned, it’s necessary to retain CO2 in order to reduce emissions, and of course, the best approach is to avoid causing any secondary pollution.
Hydrogen production using Shell reactors is available in China； The gray pyrolysis powder gasification technology is also a good process for producing hydrogen, with sulfur recovered via wet methods and hydrogen generated through PSA.