Decarboxylation of petroleum acids isolated from crude oil has been performed in the presence of different catalysts, in particular, aluminosilicate and nanosized metal oxide catalysts. Optimum conditions for the decarboxylation reaction of petroleum acids over these catalysts have been determined. The mixture of cyclane hydrocarbons produced as a result of decarboxylation of the acids has a high calorific value and can be used as an effective component of jet fuels.