Regarding the catalyst issue for producing LNG from coke oven gas! ! !
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For the conversion of coke oven gas into LNG, the first important factor is the catalysts. This includes the crude desulfurizing and degumming agents used before the reciprocating pump, the iron-molybdenum and nickel-molybdenum catalysts used in the desulfurization process, as well as zinc oxide desulfurizing agents. Most importantly, high-quality catalysts for the methaneation reaction must be purchased, ones from reputable manufacturers. A company should not buy cheap items just to save a little money, as it will ultimately harm itself in the end. Think about it – we shed tears whenever we removed the iron-molybdenum catalyst and the methanation catalyst! ! !
No matter how good a catalyst is, it still needs to be used properly; only by following the parameters provided by the manufacturer can its lifespan and performance be ensured. The companies that produce LNG from coke oven gas are usually former coking enterprises, and they lack proper awareness of process management. They do not enforce strict controls on the quality of the feed gas, and the control of temperature and pressure parameters is rather arbitrary. As a result, the lifespan of the catalysts cannot be guaranteed, which in turn leads to problems with the catalyst suppliers. This is a common issue. It would be better if managers were aware of this; it’s the first time, so it can be seen as a learning experience, and things will get better in the future. But if they fail to realize this, it doesn’t matter what catalysts are used
Coking plants are usually privately owned, and there is no proper management system in place. To save money, owners generally don’t allow managers to go out and learn; they have to figure things out on their own, working in isolation – with no other options~
Yes, the operations must be strict, especially in the purification section; if desulfurization is not proper, it directly affects the lifespan of the catalysts.
Coal tar and naphthalene in coke oven gas pose significant problems; the quality of the pre-treatment steps before compression has a direct impact on the operational lifespan of the compressor. It is difficult to regenerate coal tar and naphthalene after they are sent to the benzene removal process, and sending them to the hydrogenation unit shortens the lifespan of the hydrogenation catalysts. Therefore, it’s better to avoid using the cold shock line if possible, and careful operation along with advance prediction and treatment are necessary. It is also recommended to add filtration after precise oil and naphthalene removal – although this increases the workload for operators, it helps to extend the lifespan of the catalysts
I agree with the original poster: some projects have been built and certain technologies have been put into use, but the quality of the production staff is unreliable or management is inadequate, which prevents them from meeting the technical requirements in terms of operation and management. Catalysts, as one of the core components of the production process, cannot afford to be damaged! In terms of job operations and production management, it is necessary to strictly follow the operating procedures; otherwise, one will only invite trouble for themselves. . May I ask where the catalyst used for methanation is from, OP?
The key is management – efforts should be made to remove impurities completely; otherwise, stability cannot be achieved