The present invention concerns a method of weakening and removal of coke or carbonaceous material which deposits as a result of thermal cracking of hydrocarbons on the inner walls of coils, piping, tubing, and in general, hydrocarbon processing equipment.

A delayed coking unit has a thermal shock-resistant, erosion-resistant internal lining to reduce thermally-induced mechanical stresses in the pressure boundary of the coke drum. The lining is effective to reduce or mitigate the transient thermal stress that occurs in the pressure boundary of the coke drum and to reduce or minimize the high thermal stress resulting from temperature differentials at the skirt-to-shell junction.

A delayed coking unit has a thermal shock-resistant, erosion-resistant internal lining to reduce thermally-induced mechanical stresses in the pressure boundary of the coke drum. The lining is effective to reduce or mitigate the transient thermal stress that occurs in the pressure boundary of the coke drum and to reduce or minimize the high thermal stress resulting from temperature differentials at the skirt-to-shell junction.

A waste plastic oilification reduction system includes: a main condensation process unit including a main condensing section that has a main condensation tank to which decomposition gas in a main pyrolysis process unit is supplied and a cooling section that cools the main condensation tank, and is configured to condense the decomposition gas to produce recycled oil; a sub-pyrolysis process unit having a sub-pyrolysis tank to which a residual gas component remaining in the main condensation tank is supplied and a heating section that heats the sub-pyrolysis tank, and being configured to heat the residual gas component to produce re-decomposition gas; and a sub-condensation process unit including a sub-condensing section that has a sub-condensation tank to which the re-decomposition gas produced by the sub-pyrolysis process unit is supplied and a cooling section that cools the sub-condensation tank, and is configured to condense the re-decomposition gas to produce the recycled oil.

A waste plastic oilification reduction system includes: a main condensation process unit including a main condensing section that has a main condensation tank to which decomposition gas in a main pyrolysis process unit is supplied and a cooling section that cools the main condensation tank, and is configured to condense the decomposition gas to produce recycled oil; a sub-pyrolysis process unit having a sub-pyrolysis tank to which a residual gas component remaining in the main condensation tank is supplied and a heating section that heats the sub-pyrolysis tank, and being configured to heat the residual gas component to produce re-decomposition gas; and a sub-condensation process unit including a sub-condensing section that has a sub-condensation tank to which the re-decomposition gas produced by the sub-pyrolysis process unit is supplied and a cooling section that cools the sub-condensation tank, and is configured to condense the re-decomposition gas to produce the recycled oil.

Methods for preventing or reducing fouling of equipment having a metal surface that contacts a reaction byproduct in a fuel production system are provided. The method may include treating the metal surface in the fuel production system by contacting a fouling inhibitor with the metal surface. The fouling inhibitor includes a bicyclic organic compound with an aromatic ring and a heterocyclic ring, and is delivered to the metal surface of the system in sufficient amount and for sufficient time to reduce a fouling deposit on at least a portion of the metal surface.

Methods for preventing or reducing fouling of equipment having a metal surface that contacts a reaction byproduct in a fuel production system are provided. The method may include treating the metal surface in the fuel production system by contacting a fouling inhibitor with the metal surface. The fouling inhibitor includes a bicyclic organic compound with an aromatic ring and a heterocyclic ring, and is delivered to the metal surface of the system in sufficient amount and for sufficient time to reduce a fouling deposit on at least a portion of the metal surface.

A waste plastic oilification reduction system includes: a main condensation process unit including a main condensing section that has a main condensation tank to which decomposition gas in a main pyrolysis process unit is supplied and a cooling section that cools the main condensation tank, and is configured to condense the decomposition gas to produce recycled oil; a sub-pyrolysis process unit having a sub-pyrolysis tank to which a residual gas component remaining in the main condensation tank is supplied and a heating section that heats the sub-pyrolysis tank, and being configured to heat the residual gas component to produce re-decomposition gas; and a sub-condensation process unit including a sub-condensing section that has a sub-condensation tank to which the re-decomposition gas produced by the sub-pyrolysis process unit is supplied and a cooling section that cools the sub-condensation tank, and is configured to condense the re-decomposition gas to produce the recycled oil.

A waste plastic oilification reduction system includes: a main condensation process unit including a main condensing section that has a main condensation tank to which decomposition gas in a main pyrolysis process unit is supplied and a cooling section that cools the main condensation tank, and is configured to condense the decomposition gas to produce recycled oil; a sub-pyrolysis process unit having a sub-pyrolysis tank to which a residual gas component remaining in the main condensation tank is supplied and a heating section that heats the sub-pyrolysis tank, and being configured to heat the residual gas component to produce re-decomposition gas; and a sub-condensation process unit including a sub-condensing section that has a sub-condensation tank to which the re-decomposition gas produced by the sub-pyrolysis process unit is supplied and a cooling section that cools the sub-condensation tank, and is configured to condense the re-decomposition gas to produce the recycled oil.

A reactor has an inner surface accessible to the hydrocarbon and comprising a sintered product of at least one of cerium oxide, zinc oxide, tin oxide, zirconium oxide, boehmite and silicon dioxide, and a perovskite material of formula: A.sub.aB.sub.bC.sub.cD.sub.d0.sub.3. 0<a<1.2, Gb1.2, 0.9<a+b1.2, O<c<1.2, 0d1.2, 0.9<c+d1.2, 0.5<<0.5. A is selected from calcium, strontium, barium, and any combination thereof. B is selected from lithium, sodium, potassium, rubidium, and any combination thereof. C is selected from cerium, zirconium, antimony, praseodymium, titanium, chromium, manganese, ferrum, cobalt, nickel, gallium, tin, terbium and any combination thereof. D is selected from lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetiura, scandium, titanium, vanadium, chromium, manganese, ferrum, cobalt, nickel, copper, zinc, yttrium, zirconium, niobium, molybdenum, technetium, ruthenium, rhodium, palladium, silver, cadmium, hafnium, tantalum, tungsten, rhenium, osmium, iridium, platinum, gold, gallium, indium, tin, antimony and any combination thereof.