Regarding the carrier of catalysts
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Our plant uses sulfur-resistant Co-Mo (K811-G) catalysts for conversion; the carrier has a magnesia-alumina spinel structure. I would like to ask the experts: what is a spinel structure, and what are the differences between it and a y-Al2O3 carrier?
Can high water vapor levels cause a hydration reaction in the spinel carrier?
Your catalyst should be K811-H – the one from Qingdao Zhuoxin with the suffix H. Is the one with suffix G also theirs? The second floor provided a detailed explanation regarding magnesia-alumina spinel. In the case of magnesia-alumina spinel in catalysts, it is formed as part of the spinel structure through high-temperature reactions of the raw materials during the preparation of the catalyst carrier. Since the carrier of the catalyst is primarily magnesia-alumina spinel, which has a stable structure and does not undergo hydration reactions even at high water-to-gas ratios (up to 1.4), the catalyst exhibits high activity stability and strength. Under conditions of high pressure and high water vapor ratio, the catalyst does not become powdered and its activity remains stable. Of course, high production costs result in high prices. r-alumina is a type of alumina, specifically active alumina, which is used as a carrier for low-temperature sulfur-tolerant shift catalysts. It tends to undergo hydration reactions under conditions of higher pressure and water vapor ratios, leading to lattice collapse and subsequent pulverization. This post was last edited by dongchuancheng on 2009-3-25 12:13]