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Development of a multicommuted flow analysis procedure for simultaneous determination of sulfate and chloride in petroleum coke employing a homemade syringe pump and a LED-based photometer

“…[1][2][3][4][5] Petroleum coke has also been used as a carbon source in aluminum, refractory, and metallurgical industries. [6][7][8] Sulfate and chloride are among the main inorganic contaminants present in crude oils [9][10][11] and consequently in heavy products such as petroleum coke.…”

“…The fact that petroleum coke samples have a chemical resistance to acid oxidation, even when high temperatures and pressure are employed, complicates the sample preparation step. 6,10,11 Because the organic constituents of petroleum coke behave like fuel under a rich oxygen atmosphere, combustion techniques have been successfully used for petroleum coke digestion. When combustion is performed in closed vessels, as it is in microwave induced combustion (MIC), high sample masses can be digested, affording nal digests with a low residual carbon content (RCC).…”