Sulphur Separation by Heat Treatment of Petroleum Coke

U radu je ispitan utjecaj uvjeta toplinske obrade (temperatura, vrijeme i brzina zagrijavanja) na svojstva naftnog koksa. Ispitani uzorci su koksevi proizvedeni iz različitih sirovina za koksiranje. Praćeni su sadržaj sumpora, isparljivih tvari, pepela i gustoća, prije i nakon toplinske obrade do 2 400 °C. Rezultati ukazuju na djelomično odsumporavanje koksa u uvjetima provedenih ispitivanja. Fazna analiza je pokazala da tijekom toplinske obrade dolazi do izdvajanja i transformacije spojeva anorganskog sumpora. Najstabilniji spojevi sumpora su sulfidi identificirani u koksevima i nakon toplinske obrade pri 2 400 °C.The impact of heat treatment (temperature, heat-soak time and heating rate) on petroleum coke properties were examined. Investigated coke produced from feedstock with different compositions. The sulphur content, volatile matter, density value and ash content before and after heat treatment to 2 400 °C were analysed. Results implies partially desulphurization of the coke by performed examinations. Phase analysis of the cokes showed that during the heating, separation and transformation of some inorganic sulphur compounds took place. The sulphides are most stable sulphur compounds identified even after heating coke at 2 400 °C