32results about How to "Suitable pore structure" patented technology

The invention relates to an n-hexadecane hydroisomerization reaction method on a loaded crystalline state nickel phosphide catalyst, belongs to the field of heavy alkane isomerization, and particularly relates to the n-hexadecane hydroisomerization reaction method on the loaded crystalline state nickel phosphide catalyst. The invention aims at solving the problems of a precious-metal-containing catalyst used for long-carbon-chain heavy alkane isomerization in the prior art of high cost and poor sulfide poisonousness resistant performance and the problem of a precious-metal-free isomerization catalyst of low selectivity. According to the method, Ni(NO3)2 6H2O and (NH4)2HPO4 are dissolved into water; SAPO-31 molecular sieves are added; drying is performed at the temperature being 100 DEG C; then, the materials are put into a muffle furnace to be roasted; then, temperature-programmed reduction is performed in hydrogen gas atmosphere to obtain the catalyst; the catalyst is filled into a reactor; the n-hexadecane hydroisomerization reaction is performed.

The invention relates to a catalytic combustion catalyst for nitrogen-containing organic compound as well as a preparation method and application thereof. The catalytic combustion catalyst for the nitrogen-containing organic compound is characterized in that Al2O3 is taken as a carrier; Ir is taken as an active component; one or several of Sm, In and Sn oxides are taken as the components of an additive; on the basis of the Al2O3, the charge capacity of the active component Ir is 0.1-1wt%, and the charge capacity of the additive is 1-10wt%. The preparation method comprises the following steps: (1) dipping the carrier Al2O3 into a precursor solution of the additives, and drying and roasting to obtain an additive-carrying composite carrier Al2O3, wherein the additive is composed of one or some of Sm, In and Sn oxides; (2) dipping the composite carrier A2lO3 obtained in step (1) into a salt solution containing the active compound, and drying and roasting to obtain the catalyst, wherein the active component is Ir. The method is simple in preparation processes; the prepared catalyst is high in catalyzing combustion activity on nitrogen-containing organic waste gas, high in selectivity and high in stability, and particularly applicable to the treatment of propylene and acrylonitrile containing organic waste gas.

A catalyst for catalytic cracking to prepare olefins, a preparing method thereof and applications of the catalyst are disclosed. The catalyst includes, by weight, 5-30% of an alkaline earth metal-modified MFI molecular sieve and 0.1-3% of heteropoly acid, with the balance being SiO2, wherein the weight of the alkaline earth metal is 0.5-2% of the weight of the MFI molecular sieve. The preparing method includes (1) weighing a proper amount of the heteropoly acid, dissolving the heteropoly acid into water and fully stirring the solution, (2) adding a proper amount of an ethanol solvent and a proper amount of a silicon-containing precursor into the solution obtained in the step (1), fully stirring the solution, and adjusting the pH value of the solution to be 1-7, (3) adding the alkaline earth metal-modified MFI molecular sieve into the solution in the step (2), fully stirring the solution at a constant temperature, then adding an ionic liquid, and continuously stirring the solution until the solution is converted into sol, and then performing room-temperature ageing to obtain gel, and (4) drying the gel in the step (3) until the weight is constant and grinding the dried gel to obtain the catalyst for catalytic cracking. The catalyst has advantages of a high olefin yield, low reaction temperatures, good catalyst stability, and the like.

The invention belongs to the technical fields of environmental pollution control and clean coal combustion, and concretely relates to a high-performance porous calcium-based absorbent. The high-performance porous calcium-based absorbent comprises calcium source powder and biomass powder, and the biomass powder is pyrolyzed and volatilies when the calcium-based absorbent is calcined at a high temperature in order to form a porous structure in the biomass powder. The invention also discloses a preparation method of the calcium-based absorbent. Pores formed by the pyrolysis and volatilization of the cellulose-rich biomass powder are used to improve the adsorption capacity and the cycle stability of the calcium-based absorbent, so the prepared spherical calcium-based absorbent is suitable for capturing CO2 in a fluidized bed system; the characteristic of low cost of biomass is fully used in the whole preparation process, and the preparation method also has the advantages of high efficiency, high quality, low cost and convenience in control, so the method is especially suitable for being used in large-scale batch production.

A sulfur-doped catalytic slurry oil-based porous carbon material and a preparation method thereof are provided, belonging to the field of comprehensive utilization of catalytic cracking slurry oil andfunctional carbon materials. The technical problem to be solved by the invention is the current problem of deep processing and utilization of catalytic slurry oil. The method comprises the steps of adding a certain volume of cyclohexane to catalytic slurry oil under the heating condition, stirring until the catalytic slurry oil is uniform, filtering under vacuum, distilling the filtrate under reduced pressure, adding a certain amount of pore-forming agent to the clarified oil, stirring uniformly under the ultrasonic heating condition, heating a heating furnace to a certain temperature under the protection of inert gas, injecting the prepared mixture into the heating furnace through an injector for pyrolysis reaction to obtain pyrolysis products, elemental sulfur and carbon disulfide, stirring for a certain time under the ultrasonic condition, filtering under vacuum, collecting insoluble matters, and drying to obtain a sulfur-doped catalytic slurry oil-based porous carbon material. Thematerial is used to alleviate the volume effect of a sulfur positive electrode.

The invention relates to a periosteum material with tissue oxygenation function and its preparation method and application, including the preparation of PLGA-wrapped PFOB particles (PLGA-PFOB), the preparation of electrospinning solution and the preparation of periosteum material. All the raw materials used in the present invention are medical materials that have been approved for use, and have specific functions and high safety through special process steps; In the early stage of transplantation, the problem of lack of blood supply provides necessary oxygen for cell proliferation and accelerates the speed of tissue healing; the periosteum prepared by electrospinning method in the present invention has a suitable pore structure, which is beneficial to bone cell growth and bone tissue repair, and the process is simple , easy to transform.

The invention discloses an amorphous catalyst for one-step preparation of cyclohexanone through aqueous phase phenol hydrogenation. The catalyst takes gamma-Al2O3 or activated carbon as a carrier, takes Ni and B as active ingredients and takes transition metal and / or Ce as auxiliaries. By carrier mass, the total capacity of the active ingredients and the auxiliaries is 15-35%. When the auxiliaries are the transition metal and Ce, the transition metal is any one of Cu, Fe and Co. When the auxiliaries are the transition metal or Ce, the transition metal is Cu. The amorphous catalyst is cheap and easy to obtain and has high specific surface area and suitable duct structure, the active ingredients and the auxiliaries are small in particle size and are evenly dispersed on the carrier, and the amorphous catalyst has good heat stability and good chemical stability. When the amorphous catalyst is used for phenol hydrogenation, cyclohexanone can be prepared highly selectively while the conversion rate of phenol is high, in a clean water phase at a low pressure and a low temperature.