Study of catalytic post-treatment of the vapours from sewage sludge pyrolysis by means of γ-Al2O3

► γ-Al2O3 is useful for obtaining a better pyrolysis liquid from the point of view of its phase separation. ► γ-Al2O3 application makes it possible to lower the pyrolysis temperature. ► A general improvement in the higher heating value of the organic phases has been achieved. ► Energy content of the organic phase is comparable to a conventional fuel.