Optimal activity temperature for methanol synthesis catalyst
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Methanol production from coke oven gas; methanol synthesis catalysts. What is the optimal operating temperature for each catalyst manufacturer? For example, that of Nanhua Institute and Dalian Rike? Talk about how your company uses it
Generally speaking, the optimal operating temperature for current catalysts lies between 220–260°C; too low or too high a temperature will result in the formation of numerous by-products, which hinders their effective use
Could you be more specific? ? ? Our factory uses products from Nanhua Institute; we have been using them for one and a half years now. What is the current peak temperature at the top of the tower? Is it still 229 degrees? ? Is it a bit too low? The gas flow rate into the tower is 38,500 NM3/H, and the circulation rate is 31,200 NM3/H. How can we determine whether it’s time to increase the temperature for the catalyst? ? ? What is the typical usage phase of the synthesis catalyst C307 used for producing methanol from coke oven gas at the Nanjing Chemical Industry Institute? It’s not clear how many tons of methanol can be produced from one ton of catalyst ? ? ? Wait... I hope someone experienced can give some advice..
I still think the South China University of Chemistry and Engineering is the best
Reply to 3# ysh051225: There is no issue with your temperature value; our current catalyst outlet temperature is 228 degrees. There’s not much to say about this; as long as the distillation process is working fine, that’s all that matters. If hydrogen is not recovered from the synthesized purge gas, it is then necessary to consider how much gas needs to be vented and whether temperature elevation is required.
If your output doesn’t decrease, there’s no need to raise the temperature. How much do you produce per hour?
With an annual production capacity of 200,000 tons, the gas flow rate is 33,000, producing 18 T of high-purity methanol per hour
Hehe, the one from Nanhua Institute has good low-temperature activity; its performance declines relatively quickly when the temperature exceeds 245 degrees. The methanol synthesis reaction is an exothermic reaction; therefore, if the reaction temperature is low, the conversion rate will definitely be low, and the efficiency will certainly not be good. However, the minimum temperature for the South Chemical Institute must be above 210 degrees; otherwise, impurities such as wax will form. You need to check whether the catalyst’s activity has decreased and whether an increase in temperature is necessary. This depends mainly on the circulation ratio (that is, the pressure in the synthesis tower). If the circulation ratio increases and the pressure in the synthesis tower rises, then an increase in temperature is required; otherwise, the energy consumption will increase, which would be counterproductive. The temperature at the inlet is 229 degrees (so what is your inlet temperature?). It’s also necessary to consider the outlet temperature; if it’s high, for example 240 degrees, then it’s as if the water in the drum is being used to heat the catalyst.
I guess you need to raise the temperature of your catalyst and give it a try; if that doesn’t work, it will need to be replaced
Dalian Rick has good low-temperature activity; it can reach full production at 215 degrees Celsius without producing any by-products. As for Nanhua, our company used it in the past, but it caused severe wax formation
The hotspot temperature should be as low as possible; the temperature mentioned by the poster is quite good. Whether it’s necessary to adjust this temperature depends on factors such as the amount of vented gas, system pressure, and conversion rate.