51results about How to "Reduce the proportion of micropores" patented technology

The invention discloses a catalyst for hydrogen desulfurization of catalytic cracking gasoline and a preparation method of the catalyst. The catalyst comprises the following components based on mass of oxides: 78.0-94.0wt% of an alumina supporter of a macroporous structure, 2.0-10.5wt% of an active ingredient cobalt oxide and 2.5-15.0wt% of molybdenum oxide, wherein the supporter takes chitosan as a pore-enlarging agent. The hydrogen desulfurization catalyst is low in octane loss and high in desulfurization rate.

The invention relates to a method for carrying out selective hydrogenation on pyrolytic C6-C8 fractions. A catalyst comprises an alumina carrier having a macroporous structure, and a metal active component-palladium loaded on the carrier, wherein the content of the palladium is 0.2-0.35wt% of the total weight of the catalyst, the alumina carrier having the macroporous structure contains auxiliary components-phosphorus and magnesium, and the contents of the auxiliary components-phosphorus (P2O5) and magnesium (MgO) respectively account for 0.1-2.5wt% and 0.1-2.5wt% of the mass of the carrier; the hydrogenation process conditions are as follows: the reaction inlet temperature is lower than or equal to 45 DEG C, the reaction pressure is 2.5-4.5MPa, the volume ratio of hydrogen to oil is 60-450, and the liquid volume space velocity is 3.0-5.5h<-1>. The catalyst is high in adaptability for pyrolysis gasoline raw materials having different arsenic contents and sulphur contents, and is good in low-temperature activity.

The invention discloses a diene hydrogenation method adopting a fixed-bed reactor. The catalyst is a palladium-based supported catalyst, the reaction technology conditions are as follows: the reaction temperature is 20-90DEG C, the reaction pressure at 1.0-4.0MPa, the mass ratio of hydrogen to diene is 1.0-3.0, and the volume space velocity is 1.0-10.0h<-1>. The hydrogenation reaction technology are mild in conditions, the hydrogenation saturation rate of monoolefine is low under high diene conversion rate, the loss rate of noble metal active centers of the catalyst is low, and the activity stability is good.

The present invention relates to a catalyst for sweetening FCC gasoline. The catalyst comprises an alumina carrier having a macroporous structure and the metal active components nickel and molybdenum supported on the carrier, the alumina carrier having the macroporous structure is 66-91 wt% by weight percentage, the carrier contains auxiliary components phosphorus and magnesium, the pore size distribution is 60-180nm, the pore ratio is 2-75%, the pore volume 0.8-2.0 ml / g, and specific surface area is 250-300 m<2> / g. The content of nickel oxide is 5-19 wt%, and the molybdenum oxide content is 2-15wt%. The catalyst has the advantages of high sweetening activity, high hydrogenation selectivity of diolefin, and less loss of octane value.

The present invention relates to a first-stage selective hydrogenation catalyst for cracking gasoline, wherein the catalyst comprises an alumina carrier having a macroporous structure and a metal active component palladium supported on the carrier, and the palladium content is 0.2-0.35 wt% based on the total weight of the catalyst. The catalyst of the present invention has advantages of good glue capacity, strong arsenic resistance, strong sulfur resistance, and strong coking inhibition.

The invention relates to a method for FCC (fluid catalytic cracking) gasoline sweetening. The method adopts a fixed bed reactor, a used catalyst comprises, in weight percentage, 66-91wt% of alumina support with a macro-porous structure, 5-19wt% of metal active component nickel oxide and 2-15wt% of metal active component molybdenum oxide, the metal active component nickel and the metal active component molybdenum are loaded on the support, the alumina support takes chitosan as a pore-expanding agent, the support comprises additive component phosphorus and additive component molybdenum, and the reaction process conditions include that reaction temperature ranges from 110 DEG C to 220 DEG C, reaction pressure ranges from 1.1MPa to 3.5MPa, volume space velocity ranges from 1.2h<-1> to 4.0h<-1>, and hydrogen oil volume ratio is (7-25):1. The sweetening method has strong adaptability to oil products with different sulfur contents, mercaptan sulfur contents and olefin contents.

The invention discloses a lithium-sulfur battery positive electrode material containing a three-dimensional interpenetrating composite carbon material and a preparation method thereof, a positive electrode plate containing the lithium-sulfur battery positive electrode material, and a lithium-sulfur battery. The composite carbon material has a three-dimensional interpenetrating network structure and is formed from carbon nanotubes and ZIF-67 derived hierarchical porous carbon polyhedrons by interpenetrating. ZIF-67 is grown on the surface of activated carbon nanotubes used as a framework, and the ZIF-67 is carbonized into hierarchical porous carbon polyhedrons through high-temperature sintering. The preparation method of the lithium-sulfur battery positive electrode active material comprises the following steps: weighing the composite carbon material and elemental sulfur according to a mass ratio of 1: 4; uniformly dispersing the composite carbon material and the elemental sulfur in a CS2 solution; carrying out stirring until the solvent is completely volatilized; and infiltrating the elemental sulfur in the mixture into a carbon structure by using a melting method. The positive electrode plate is composed of the positive electrode active material, superconducting carbon and a binder in a mass ratio of 8: 1: 1. The lithium-sulfur battery is mainly composed of the positive electrode plate, a diaphragm, an electrolyte and a lithium metal negative electrode.