48results about How to "Avoid rapid deactivation" patented technology

A method is provided for the thermo-neutral reforming of liquid hydrocarbon fuels which employs a Ni, Ce2O3, La2O3, Pt−ZrO2, Rh and Re catalyst having dual functionalities to achieve both combustion and steam reforming.

The invention provides a petroleum resin hydrotreating method. The method comprises the following steps that (1) dissolved petroleum resin raw materials enter a first section hydrofining reactor where catalysts are loaded in a staged mode, a reaction is carried out under the conditions that the reaction pressure is 8-17.0 MPa, the reaction temperature is 230-270 DEG C, the air speed is 0.3-0.7 h<-1>, and the hydrogen / oil ratio is 300-800 v / v, the topmost portion of the first section hydrofining reactor is filled with a protecting agent, a main catalyst is a non-noble metal sulfide state supporting catalyst, and the bottom of the first section hydrofining reactor is filled with a sweetening catalyst; (2) after first section reaction products are washed with water and subjected to gas-liquid separation, liquid substances are sent into a stripping tower to be subjected to steam stripping, and hydrogen sulfide is further removed; (3) the liquid substances subjected to steam stripping enter a second section hydrogenation and dearomatization reactor and make contact with a supporting type Ni catalyst, and a reaction is carried out under the conditions that the reaction pressure is 4-10.0 MPa, the reaction temperature is 230-260 DEG C, the air speed is 0.5-0.7 h<-1>, and the hydrogen / oil ratio is 300-800 v / v; and (4) after reaction products obtained in the second section hydrogenation and dearomatization reactor are subjected to gas-liquid separation, solvent and petroleum resin products are separated, and the solvent is reused after being recycled. According to the method, the operation cost is low, and the yield of high-value products is high.