Analysis of catalytic raw materials
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There is a phenomenon with current catalytic feedstocks: the analytical parameters of the purchased feedstocks appear to be normal, but once they enter the catalytic cracking unit, the product distribution and yields are not satisfactory. How do people determine the quality of catalytic feedstocks?
Do you mean the catalyst is not ideal, or the feed oil is not ideal?
In catalytic processes, the factors that affect process operation, product quality, and product distribution are as follows: 1. The physicochemical properties of the catalytic feed oil, including boiling range, density, hydrocarbon ratio, composition, sulfur and nitrogen content (especially basic nitrogen), and trace metal content; 2. Catalyst characteristics; 3. Operating conditions of the catalytic process; 4. The technical skills and competence of production management personnel (a factor that is often overlooked by the managers within the company itself). Discussing a single factor alone cannot determine the root cause of a problem.
The catalytic raw materials purchased show normal values according to standard analysis results; the issue is that the yield of the product is low and doesn’t increase. Could it be that other types of oils have been mixed in?
What data have you all analyzed?
I’m not sure what data you’ve analyzed; if the proportion of catalytic products in the catalytic feedstock is high, such as in the case of slurry, then the product distribution won’t be good
This post was last edited by qugd on 2022-1-24 at 10:53. What does it mean when the regular analysis data is all normal? Is that abnormal data normal? What is the ideal distribution for your catalytic cracking products? There are more than just the feedstock as factors that affect the products of catalytic cracking; catalysts, operating procedures, catalyst regeneration, blending of feedstocks, and the types of auxiliary materials used in the processing process are also important factors. To assess a complex issue, it is necessary to adopt the method of dialectical materialism and consider it in a comprehensive manner. Additionally, you could also take a sample of the raw materials and send it to petrochemical research institutions for a comprehensive evaluation of their processing properties. Simply making qualitative statements here is not sufficient; you haven’t even provided any so-called standard data, nor have you mentioned the specific names of the catalytic materials. It seems like you’re acting without a clear direction. It is recommended that you first consult a textbook on catalytic cracking or some more specialized materials.
Routine analysis: boiling range, density, residue, sulfur content； Four-component and trace element analysis can also be performed ； If possible, microscopic molecular analysis can be performed ； Conventional analysis can only provide a rough estimate; it is not precise ； Four-component analysis can provide a rough estimate of the structural proportions; microscopic analysis is the best method. However, if your samples are a mixture of different varieties, you can only be responsible for the sample itself, not for the entire batch of material. This is especially true for materials that have been passed through multiple hands, as anything could be mixed in.
What is the composition of your catalytic feedstock? How much slag is included in it, and is any material sourced from outside used?
Generally, coker wax oil is just added to it. If the analysis of the externally sourced materials specified is thorough, such problems usually do not occur; in that case, it would be considered a quality issue.