What is the standard for the reaction depth in a delayed coking unit?
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What are the criteria for controlling the reaction depth in coking units? Based on the furnace outlet temperature, petroleum coke hardness, or petroleum coke volatility?
Based on the hydrocarbon ratio of petroleum coke, it is quite clear that as the degree of reaction increases, the hydrocarbon ratio of petroleum coke also increases
How do you analyze the hydrocarbon ratio of petroleum coke? I’ve rarely heard of this indicator.
The yield of dry gas, the yield of petroleum coke, and the hardness of petroleum coke as well. . .
Recently, Sinopec plans to introduce a petroleum coke hardness analyzer in order to determine whether the reaction has proceeded to an adequate extent by measuring the hardness of the petroleum coke. Personally, I believe that volatiles can relatively characterize the degree of reaction.
The hydrocarbon ratio is a laboratory value; it is not easy to determine in the laboratory. Considering the difficulties associated with laboratory analysis, it is better to use hardness as a criterion – volatile content varies significantly among petroleum coals depending on the sampling location
It seems that a evaluation system still needs to be established. Recently, Sinopec has been using the yield of petroleum coke/residue to assess the degree of coking reaction, but I believe this approach is not very scientific.
Under normal conditions, the yield of coke is 1.6 times that of the Conrad residual carbon. Pretty normal.
The advanced indicator specified here is around 1.4, while the highest value in China is 1.2.
The oil coke yield/residue is used to assess the degree of coking reaction; it’s a decent indicator for residue, but with many blended oils being used as coking feedstocks, this indicator yields significant errors
The use of petroleum coke yield/residue to evaluate the depth of coking reaction is quite common these days, and it is regarded as a standard compliance indicator. In my opinion, it is still the volatiles that can simply and intuitively reflect the degree of reaction!