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Biodiesel
Published in Arumugam S. Ramadhas, Alternative Fuels for Transportation, 2016
Arumugam Sakunthalai Ramadhas, Simon Jayaraj, Chandrasekaran Muraleedharan
Conradson carbon residue (CCR) is the measure of tendency of a fuel to produce deposits on injector tips of nozzle and combustion chamber. This is measured as per ASTM D 4530 test method. The test is performed via heating a weighed sample of a fuel to 500°C under a nitrogen atmosphere for a specified duration. At these conditions any volatiles that are formed are purged by nitrogen and the residue that remains is called carbon residue. The maximum limit for carbon residue in biodiesel is 0.05% by mass. The common source of carbon residues in biodiesel is due to an excessive level of total glycerin. This gives an indication of the amount of glycerides, FFAs, soaps, higher unsaturated fatty acids, inorganic impurities, additives used for, and catalyst residues remaining within the sample.
Composition and Types of Crude Oil and Composition of Natural Gas
Published in Hussein K. Abdel-Aal, Economic Analysis of Oil and Gas Engineering Operations, 2021
Carbon residue is the percentage of carbon by weight for coke, asphalt, and heavy fuels found by evaporating oil to dryness under standard laboratory conditions. Carbon residue is generally referred to as CCR (Conradson carbon residue). It is a rough indication of the asphaltic compounds and the materials that do not evaporate under conditions of the test, such as metals and silicon oxides.
Resid Hydrocracking: New Frontiers
Published in Michael C. Oballa, Stuart S. Shih, Catalytic Hydroprocessing of Petroleum and Distillates, 2020
G. Nongbri, G. A. Clausen, J. R. Huang, D. E. Self, C. A. Paul, A. I. Rodarte
As the refiners increase the proportion of heavier, poorer quality crude in their feedstocks, the need grows for effective processing methods to treat the fractions containing increasingly higher levels of sulfur, metals and conradson carbon residue (CCR).
Study on the production of low sulfur petroleum coke
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2020
Conradson carbon residue (CCR) is the substance left after the oil sample is burned in insufficient air. CCR is generally formed by the condensation of polycyclic aromatic hydrocarbons. The residue contains not only a large number of aromatic hydrocarbons, but also a lot of resins and asphaltenes. And the resins and asphaltenes also contain a large number of polycyclic aromatic hydrocarbons and heterocyclic aromatic hydrocarbons, so the CCR content of the residue is high. In the coking reaction, the polycyclic aromatic hydrocarbons in the residue will be condensed to form petroleum coke. CCR is the precursor of coke. The higher the CCR content, the higher the petroleum coke yield (Trasobares et al. 1999).