Open AccessThermolysis of Oil Sludge With Metal Chlorides as a Catalyst
Author(s) -
Esther M. Sulman,
К.В. Чалов,
Yury V. Lugovoy,
Yu. Yu. Kosivtsov,
I. S. Smirnov
Publication year - 2021
Language(s) - English
DOI - 10.37394/232023.2021.1.4
Subject(s) - catalysis , thermal decomposition , raw material , decomposition , chemistry , metal , oil sludge , waste management , chemical engineering , pulp and paper industry , organic chemistry , engineering
Oil sludge utilization is an important economical and ecological problem which solution can be an essential step towards the development of resource-saving technology on the basis of the integrated use of oil raw material. Catalytic influence of КCl, NaCl, ZnCl2, MgCl2,∙AlCl3, FeCl2, FeCl3, CoCl2 and NiCl2 on the thermolysis of oil sludge had been studied. The optimal process parameters such as temperature, amount of catalyst, ratio of oil sludge to sand, residence time of the black sludge inside reactor were also explored. The most attractive conditions were dined as follows: catalyst – CoCl2 5 wt. %, oil content – 20 wt. %, temperature – 500 o C. Besides NiCl2 and ZnCl2 also showed a high level of conversion. As a result of CoCl2 influence the activation energy of thermolysis decreased by 20-30 kJ/mol; the presence of C1-C4 hydrocarbons in gaseous product increased in 2.4; a percent degree of conversion of oil sludge into gaseous and liquid products increased by 37% and 7% , respectively, compared to non-catalytic treatment.