Several consultation questions regarding the methanol synthesis tower (tubular type) and catalysts
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1. I personally feel that the tubular synthesis tower is essentially the same. What is the difference between Lurgi and Topsoe abroad? What is the purpose of the 700-mm insulation layer installed on the upper pipe sheet at East China University of Science and Technology? I’m not sure if my idea is correct: after catalyst reduction, there is a 10% shrinkage rate; the 700 mm of catalyst on the upper layer drops inside the tube (due to this shrinkage, the catalyst inside the tube drops by exactly 700 mm in a 7-m-high tube, assuming a 10% shrinkage rate). 2. If there are not significant technical differences between the synthesis towers, would it be better to choose domestic technology paired with foreign catalysts? What are the current prices of catalysts abroad? How is catalyst performance generally ensured? What is the warranty period for the catalyst’s lifespan and methanol production – 3 years or 4 years? Does the impurity specification only apply to ethanol? Does that manufacturer guarantee the total content of impurities? 3. When reading posts about catalysts on the forum, I saw that Topsoe’s dosage in Zhongyuan Dahua was very low. Is there anyone who is familiar with this project? Please provide a detailed introduction. Catalysts from JMC, Topsoe from SUDCHEM – has anyone conducted a comprehensive comparison among these three? Could you recommend any? Well, of course, price is also important. Are there any projects in which they bid together? If you know of any, please let me know; we can also go to the manufacturers and ask them why that choice was made.
Answering the first question, you said the answer was basically correct. Additionally, it is considered to leave a certain amount of catalyst on the upper tube sheet after catalyst reduction; this serves two purposes: one is to absorb some of the catalyst poisons, and the other is to enable certain reactions to occur there, thereby further raising the temperature of the reaction gases. Second question: Based on previous investigations, the catalysts produced by Xiyan Institute come with a 2-year warranty, but can actually be used for 3 years, and their price is relatively low ； The service life of Topso can actually reach 4 years or more, but its price is twice that of domestic alternatives. The ethanol content in the product is very low; it mainly affects the separation process in the distillation system and is not part of the performance guarantees – only the service life is typically guaranteed.
Our factory, Yongde, is a great choice from Xiyan Chemical Institute – it has worked without any problems for three years now, and the prices are also low: handshake
Topso’s catalysts are of good quality and offer high efficiency. But it is also a fact that its price is high. Additionally, only her catalyst can be used during replacement to ensure the original output level. This cost will not be reduced during subsequent maintenance and replacement. Furthermore, since Sojinko’s catalysts are from ICI’s catalyst company, their performance should also improve significantly. It has a sales company in Shanghai. I heard that they are now focusing on the domestic market. You can search to find out.