Daily Question: Methanol and Purification Technology Forum Edition 20191028
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Requirements for the pH value of water-coal slurry: The pH value of water-coal slurry should be kept between 7 and 9. If the pH value is below 7, the mixture becomes acidic, which can corrode all the equipment and pipelines it comes into contact with； If the pH value is greater than 9, scaling will occur in the pipes, leading to blockages. An appropriate pH value facilitates the better action of additives on the coal slurry, ensuring the stable operation of the coal slurry pipelines and the gasifier.
The impact of pH value indeed cannot be ignored