Regarding methanol analysis: Which operations in the plant affect methanol levels?
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In the standards for industrial methanol, various parameters include: colority (platinum-cobalt), density (at 20°C) in g/l, boiling range under 101.325 KPa, temperature range (including 64.6±0.1)°C, potassium permanganate value ≤, water solubility test, moisture content % ≤, free acid content (calculated as HCOOH) in ppm, free base content (calculated as NH3) in ppm, aldehyde compound content (calculated as HCOH) in ppm, evaporation residue in ppm, and odor. How do these parameters affect actual operations? For example, if I want to increase the potassium permanganate value now, what actions do I need to take during actual operation in the factory? Who can explain how to control all the relevant indicators?
There’s too much of this! It’s mainly temperature and system pressure; generally, the higher the system pressure, the higher the output. It also depends on the composition of the gas, the performance of the catalyst, and so on·~~~
There are too many standards: the Japanese triangular standard, the American Double A standard, and the Russian standard
Operating temperature, operating pressure, amount of alkali added, catalyst performance, amount of extraction water used, and gas composition of the syngas – these parameters must not vary significantly during operation
We analyzed the sampling techniques used by analysts, as well as their personal habits when preparing samples... We conducted an interesting experiment: three analysts prepared the same sample, and the results obtained by them varied quite significantly
Temperature and system pressure, the composition of the gas, the performance of the catalyst, system stability, sampling methods, analysis techniques, analysis errors, and so on are all relevant factors.