How to prevent and deal with wax formation in coal-to-methanol production
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Our company uses the coal-to-methanol process, and the water coolers used in methanol synthesis often suffer from wax formation, which affects the efficiency of methanol separation. Dear friends, how can we prevent and deal with this?
Wax formation is mainly a problem related to synthesis; it is necessary to control the synthesis temperature properly – the inlet temperature should not be too low, and the hotspot temperature should not be too high. Increasing the H/C ratio appropriately can help reduce side reactions. Clean the condenser promptly during major repairs or shutdowns!
Control the temperature of the synthesis tower carefully; the inlet temperature should be above 200 degrees. The peak rate of paraffin formation occurs at temperatures between 170 and 200 degrees, but the temperature cannot be set too high to avoid side reactions. Reduce the number of start-up and shutdown cycles; after parking, the system must be purged with nitrogen to ensure proper conditions. Remove the paraffin that has accumulated in the coolers and separators after parking