Methanol conversion method with cascade moving beds
A methanol conversion and moving bed technology, applied in chemical instruments and methods, catalysts, organic chemistry, etc., can solve problems such as catalyst poisoning, large transmission power, and increased energy consumption, and achieve energy saving, stable device operation, and energy saving consumption effect
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Embodiment 1
[0086] This example illustrates the experimental results of simulating two moving bed reactors for methanol to propylene reaction on a small atmospheric pressure fixed bed microreactor.
[0087] The small normal pressure fixed bed micro-reactor and the MTP catalyst used are the same as those in Comparative Example 1. The catalyst is sieved to 20-40 mesh, firstly, at a temperature of 480°C, normal pressure, and 100% water vapor feed mass space velocity for 2h -1 Under treatment for 12h.
[0088] Simulate the first moving bed MTP reaction, evaluation test, the reaction pressure is normal pressure, and the tube core temperature of the MTP reactor is controlled at 480±5°C. According to the methanol feed mass space velocity 0.96h -1 , running for 144 hours in total, the conversion rate of methanol dropped from the initial 100% to 95.03%, and the operation was stopped. It is considered that the MTP catalyst has been deactivated by carbon deposition and should be removed from the ...
Embodiment 2
[0092] This example illustrates the experimental results of simulating three moving bed reactors for methanol to propylene reaction on a small atmospheric pressure fixed bed microreactor.
[0093] Following the evaluation of Example 1, the catalyst riser reaction was simulated, and the evaluation test was carried out by using toluene to simulate the aromatics-containing material. The reaction pressure was normal pressure, and the tube core temperature of the MTP reactor was controlled to be 475±5°C. Switch to toluene feed mass space velocity 0.5h -1 , accumulatively running for 16 hours, stop running.
[0094] Simulate the evaluation test of the third moving bed MTP reaction, the reaction pressure is normal pressure, and the tube core temperature of the MTP reactor is controlled at 480±5°C. According to the methanol feed mass space velocity 0.85h -1 , accumulatively running for 82 hours, the conversion rate of methanol dropped from the initial 100% to 93.54%, and the operati...
Embodiment 3
[0097] This example illustrates the experimental results of simulating four moving bed reactors for methanol to propylene reaction on a small atmospheric pressure fixed bed microreactor.
[0098] Following the evaluation of Example 2, the catalyst riser reaction is simulated. The gasoline that adopts methanol-to-gasoline (MTG) process to obtain (laboratory MTG evaluation retention, containing 33.9% by weight of aromatics, 12.69% by weight of olefins, and others are alkanes and naphthenes) is used as a rejuvenating agent, and the temperature of the MTP catalyst bed is controlled to be 470 ±5°C, space velocity 0.5h-1, normal pressure reaction 16h.
[0099] Simulate the fourth moving bed MTP reaction evaluation test, the reaction pressure is normal pressure, and the tube core temperature of the MTP reactor is controlled at 480±5°C. According to the methanol feed mass space velocity 0.8h -1, running for 72 hours in total, the conversion rate of methanol dropped from the initial ...
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