I am trying to reduce the sulfur content in spent hydrotreating catalyst during calcination at a minimum temperature of 600*F from 7-8% to below 1% with only one pass through our calciner.
At a temperature below the sintering temperature for the active component of your catalyst, calcine to the impossibility of detecting by smell the sulfur-containing compounds in the passing gas. A serious excess of the allowable temperature (according to the manufacturer's data) will lead to a drop in the activity and lifetime of the catalyst.I apologize for Google-translation ....
Thank you for your response. Our kiln has been modified from a soil remediation calciner to a catalyst calciner. The number, shape and placement of the flights has been our main issue. We have yet to achieve 100% sulfur removal. This is verified by the sulfur smell and analyzing the sulfur percentage of the discharged material. Any recommendations for the addition of more flights? Our temperatures are below the sintering temperatures of the active components of the catalyst.
I do not know the design features of your furnace, so I can not give concrete recommendations. But if you raise the calcination temperature to 2/3 -4/5 of the sintering temperature and extend the time, it will be useful. If there is a possibility, analytically determine the sulfur content. .. But our nose is a very sensitive tool :))
I agree, our olfactory senses are a great indicator! I do have a carbon/sulfur analyzer to get instant analytical results. I will pass on your information to my Operations Manager and discuss adjustments to our processing. Thank you for your assistance.
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