Did the high-pressure alcohol catalyst, without being reduced, cause the temperature to soar to 330 degrees during pressure testing?
Thread Content
The high-pressure alcohol catalyst was not reduced; during pressure testing, the introduction of high-pressure alkylation gas into the alcohol system caused the pressure to surge to 12 MPA, and the temperature of the catalyst layer also rose sharply to 330 degrees in an instant. What exactly happened here? Seek help from experts! ! !
Introduction of high-pressure alkane gas causes rapid temperature rise
Is the high-pressure alkane gas introduced at a temperature? The heat of reaction for alkylation is enormous.
This post was last edited by Yan Qiusheng on 2010-8-21 09:06. The reason is that a vigorous reduction reaction occurred in the methanol catalyst, causing its temperature to rise. Our facility has also encountered similar problems; in our case, it was the increase in the temperature of the methanol catalyst that occurred during the initial replacement of the methanol system. The reason for this was found to be the high levels of CO and CO2 in the gas used for replacement.
The alkylated gas enters at room temperature; could it be caused by a high oxygen content?
Reply to 4# Yan Qiusheng: A reduction reaction requires a heat source; a certain temperature must be reached for the reaction to occur. Is the heat source provided by methanation?
This post was last edited by 654262293 on 2010-9-15 09:34. I also think that if the gas entering the methanol catalyst does not reach the temperature required to initiate reduction, how can a reduction reaction take place? A small amount of oxygen in the gas entering the methanol catalyst should not have any effect, as the catalyst is already in an oxidized state and has not been reduced to a reduced state.
Reply to 7# 654262293: The methanol catalyst undergoes reduction reactions at very low pressures; it is mainly a reduction reaction between the catalyst and CO. Since the flow rate is low during system purging, the temperature of the catalyst layer rises easily. This is something I have experienced firsthand.
I have been through a situation like this before. Is what was said upstairs referring to the temperature rise that occurred during the pressure testing phase after replacing the catalyst? If that is the case, there could be several possibilities: first, the rate of pressure increase (or decrease) is too fast, the test pressure is too high; (after a leak occurs, pressure is reduced to address the leak, and this process is repeated multiple times) ； Secondly, when the catalyst is being installed, the temperature of the tower walls is relatively high, possibly exceeding 45 degrees, and the insulation of the catalyst baskets is poor ；