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A few days ago, after the second conversion furnace of the 260,000-ton methanol plant with an annual output of 260,000 tons was adopted by Qingdao Lianxin, the content of export mercaptan thioether was reduced from 28mg/m3 to 11mg/m3, and the conversion rate reached 61%, which solved the problem of the formation of
mercaptan sulfide in the conversion section of high CO content and high sulfur raw gas.
The device adopts Shell pulverized coal gasification to produce gas, low water-gas ratio sulfur resistance conversion process, high CO content of crude gas, high sulfide content, water-gas ratio of 0.
2~0.
3
.
During the operation of the device, a certain amount of organosulfur compounds (mercaptan thioethers) are detected at the outlet of the conversion furnace, which has a great impact on
the normal operation of the methanol synthesis process.
In view of the problem of increasing organic sulfur content at the outlet of the converter furnace, Qingdao Lianxin has developed a new QDB-07 sulfur-resistant conversion catalyst suitable for high sulfur working conditions on the basis of the original QDB-04 catalyst, which can more effectively inhibit the formation of
organic sulfur.
