Isn’t it good to simply use the purified coke oven gas as fuel? Why methanate?

Coke oven gas mainly consists of hydrogen and methane, with small amounts of CO and other components. Methanization is carried out to produce pure natural gas, which can be used not only as a fuel but also as a raw material. Wider market reach and a larger customer base

There was a reason why the original city gas supply was discontinued.

The last edit to this post was made by lflsedin on 2015-12-28 at 20:55; go use a PSA unit for hydrogen purification to purify the hydrogen

There are two main reasons for the elimination of city gas: 1) Gas contains CO, which can lead to poisoning; 2) It is difficult to control the supply volume, making it hard to manage peak loads, and the gas production process generates significant pollution, which does not meet current environmental standards.

Methane has a small volume, so the transportation cost is also low.

Isn’t it good to simply use the purified coke oven gas as fuel? ---If there is a demand for fuel gas, using purified coke oven gas as fuel is the best option. Why methanate? ----It is a solution chosen because the gas from coking plants cannot be used, and also for environmental protection reasons. This is corporate behavior. If regional energy or coal chemical industry plans are taken into account, methanation is not necessarily the best option; for example, the current process of producing LNG followed by re-combustion is not ideal.

1. Environmentally friendly 　Natural gas is a clean and environmentally sustainable premium energy source; it contains almost no sulfur, dust, or other harmful substances. It produces less carbon dioxide when burned compared to other fossil fuels, resulting in a lower greenhouse effect, and thus it can effectively improve environmental quality. 2. Cost-effective 　Compared to artificial gas, natural gas has a similar calorific value per unit price. It is also cleaner, which helps to extend the lifespan of cooking appliances and enables users to reduce maintenance costs. Natural gas is a clean fuel with stable supply, capable of improving air quality; thus, it can provide new impetus for the economic development of this region, driving economic prosperity and environmental improvement. 　3. Safe and reliable 　Natural gas is non-toxic, easily dispersible, and has a lower density than air; it does not tend to accumulate as an explosive gas, making it a relatively safe fuel source. 4. Improving living standards 　　By using safe and reliable natural gas in households, the living environment can be greatly improved, thereby enhancing the quality of life. Since the coke oven gas to natural gas project is a commercial venture, it is certainly aimed at maximizing profits. I believe that most companies undertaking such projects should experience a permanent surplus of gas, as it is difficult to consume all of it through urban users and industrial processes for various reasons. Moreover, since it constitutes a clean energy source, financial support can be obtained for it. Other than that, I can’t think of any reason for such a conversion, as the costs are truly very high; especially when it comes to liquefying SNG into LNG during peak demand periods, the electricity consumption is astounding.

This post was last edited by readytogo on 2016-1-5 08:39. It’s mainly a matter of safety – safety should come first in everything； Another one is the issue of economic benefits. There are mainly four reasons: 1. CO in gas is toxic; leaks can easily cause poisoning, even death ； 2. H2 has a wide explosive range (4.0%-75.6%), making it highly explosive; this range is much wider than that of methane (4.9%-16%) ； 3. The overall calorific value of gas is not high; its heat release upon combustion per equivalent is lower than that of methane, and its price is also higher ； 4. The compression required for gas is less than that for natural gas, which poses many difficulties in storage and transportation.