TY JOUR TI THERMAL PROCESSING OF OIL AND GAS RESIDUES IN THE HYDROGEN SERVICE KW thermal processes KW viscosity breaking KW hydrovisbreaking KW hydrogen KW hydrogen gas KW mazut KW tar KW catalytic additives KW hydrogen donors KW low activity catalysts JO Vestnik of Astrakhan State Technical University AU Nurakhmedova, A.. AU Tarakanov, G.. PY 2015 IS 2015 PB Astrakhan State Technical University