Conradson evaluation

In resid cracking the high feed metals and Conradson Carbon Residue (CCR) require careful consideration when assessing both catalyst design and performance evaluation. This paper addresses the issues of the latter with respect to coke, delta coke and catalyst deactivation. 

The INT-RI catalyst can be used in fixed bed hydrotreating units to improve the residue quality, from a high sulfur residual to a low sulfur fuel oil [6]. Tests were performed to demonstrate the technical feasibility of directly processing these residues, using atmospheric residue of Cerro Negro and Iranian Gach Saran crude oils as feedstocks. These residues are characterized by a higher content of asphaltenes and Conradson Carbon than the deasphalted oils [5,6]. Therefore, the effect of these two variables on the performance of the catalyst, can be evaluated. 

Thus the equivalence of and as well as of and G has been proved. The statistical evaluation of results in a mean x = 585.9 X with a coefficient of variaton +V= 14.34 %. It is well known, that measurement of the Conradson coke residue exhibits a large scattering. DIN 51 551 speaks of a repeatability of 10 % and a reproducibility of 15 % of the values. 

Conradson, S., and Hemandez-Ramos, P. (2004). Computers, the Internet, and cheating among secondary school students Some implications for educators. Practical Assessment, Research Evaluation, 9(9), 9. 

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