Conditions for the methanol-to-olefins reaction
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This post was last edited by jordan569 on 2013-1-6 at 21:06. I came across a description stating that the reaction temperature is around 470°C (or below 470°C); those who have relevant data please share the operating conditions: temperature, pressure, space velocity, and the service life of the catalyst (the possible range). I am familiar with the catalytic units used in the petrochemical industry; their reaction temperature ranges from approximately 490 to 550°C. Fluidized catalytic cracking is employed, and the catalysts are reused, with particle sizes typically falling between 20 and 100 microns. The price per ton ranges from 20,000 to 60,000 yuan. So, there are differences between fixed-bed and fluidized-bed processes for producing olefins from methanol; what about the catalysts? What’s the price range? . Note $ # , $ $
Olefin production from methanol includes MTO and MTP; the processes utilize fixed-bed (MTP) or fluidized-bed (MTO) reactors, with catalysts being ZSM-5 (MTP) and SAPO-34 (MTO) respectively. The temperature ranges from 450 to 470 degrees, and the pressure is slightly higher than atmospheric pressure. For MTO using the fluidized bed process, it is similar to FCC in that both employ a reverse regeneration system; however, the reaction principle differs significantly from that of catalytic cracking. As a result, different catalysts are used, and these catalysts are much more expensive than those used in catalytic cracking in the petrochemical industry – their price can be as high as several hundred thousand yuan per ton. The particle size of the MTO catalyst used in fluidized beds is more or less the same as that of FCC catalysts. It’s hard to say what the service life of catalysts will be; currently, neither MTP nor MTO processes are in large-scale commercial operation (the relevant data from the trial run of Shenhua Baotou DMTO, especially those regarding economic efficiency and catalyst degradation, has not yet been made public). There is no reliable data available, and even if such data does exist, it comes from laboratory or pilot-scale tests, which isn’t very useful.
I think no one wants to talk about loss data at the moment, but it is the main factor restricting these types of devices; it is a problem that can be solved through continuous communication and exploration between production units and catalyst manufacturers.