How to determine if an FCC catalyst has degraded
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In normal production, can catalyst deactivation and reduced selectivity be determined from those data? (Product distribution, isobutane content in liquefied gas, hydrogen/methane ratio in dry gas), as the quality control department of our factory can only determine the KOH index, which has limited relevance. We hope to receive guidance from all experts; thank you!
It is recommended to communicate with the catalyst manufacturer to conduct regular comprehensive analyses of the catalyst; it is better to analyze its activity, heavy metals, and particle size distribution
Communicating with catalyst manufacturers to examine aspects such as microreactor activity, residual carbon, and particle size distribution will yield relatively clear results
Generally, the catalyst poisoning is determined by the hydrogen-to-methane ratio； The catalyst loss is determined through the recovery rate of the tri-spin, which indirectly provides information on the particle distribution of the catalyst ； Determine the catalyst’s activity by the rate of fresh catalyst addition!
Well, samples are now sent regularly to the catalyst factory; does the level of heavy metals in the catalysts, the amount of antimony present, and the residual carbon also affect the catalyst’s activity?
Well, teacher, how much do you keep controlling the micro-reflector?
For a while, our catalyst was severely poisoned, and there was no change in the hydrogen/methane ratio either!
I’m truly sorry; I haven’t been working in catalytic cracking for many years now
I didn’t say that either; generally, it’s determined whether the catalyst is poisoned by comparing the ratios of hydrogen to methane! This is a conventional method; product distribution can also be examined ； If possible, do a catalyst analysis! The symptoms of heavy metal poisoning also vary considerably; some of them affect the structure of the catalysts, preventing the raw materials from undergoing catalytic cracking reactions properly ； Some block the internal channels of the catalyst, resulting in a decrease in its activity ； Some are temporary, some are permanent; both require different perspectives to address them! There are countless methods; it’s up to you to figure out how to use them to make judgments and take action!
We keep the microreactivity between 62 and 65
Catalysts are now generally produced by specialized catalyst companies, and their after-sales service is quite good