DMTO conversion rate issue
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This post was last edited by liaifeng on 2018-9-3 08:43. Have you encountered situations in normal production where the levels of the reaction gases carbon monoxide and carbon dioxide exceed the specified limits? How can such situations be mitigated? Is it related to the feed load? Seeking advice from experts
Yes, it was due to the methanol feed
This post was last edited by ljx5210 on 2017-5-12 23:24. I have encountered situations where the CO2 level was too high, but not CO levels. Speaking of which, either there is a problem with the degassing of the regenerated catalyst, or there is an issue with the quality of the methanol. However, given the high activity of the DMTO catalyst (compared to other ones), there should be no major issues. I wonder what the quality of methanol feed is like at various DMTO plants? What are the test results for the methanol that came earlier, in terms of impurity content (total nitrogen, alkalis and alkaline earth metals, KMnO4 time, fusel oils, TMA, etc.)?
Normally, on the screen showing the three-spin reaction, there is a figure indicating the methanol conversion rate; take a look at that. Under normal circumstances, it can be fully converted. As the original poster mentioned above, you can analyze your methanol raw material to see how much impurity it contains. Another possibility is that the high levels of CO and carbon dioxide are due to the decomposition of methanol within the reactor. Controlling the relevant parameters should solve the issue. I was wondering what your reaction temperature, storage capacity, methanol feed rate, and external steam supply are? Regenerative stripping should be fine; there won’t be any carbon monoxide or carbon dioxide flowing from the regenerator into the reactor. I wonder if you’ve resolved it by now?