8results about How to "Large hole volume" patented technology

This invention provides a method for preparing and applying a catalyst for co-thermal pyrolysis of waste plastics and biomass, comprising the following steps: Step 1, mixing FCC waste catalyst, sodium carbonate, and a metal oxide precursor uniformly to form a powder; Step 2, modifying HZSM-5 molecular sieve with phosphorus; Step 3, mixing the mixture obtained in Step 1, the phosphorus-modified ZSM-5 molecular sieve from Step 2, a binder, and water to form microspheres, calcining to obtain the catalyst for co-thermal pyrolysis of waste plastics and biomass. The catalyst prepared by this invention has a large pore size and pore volume, and when used for co-thermal pyrolysis of waste plastics and biomass, the liquid yield is greater than 70%.

This application relates to a silicon-modified macroporous pseudoboehmite and its preparation method, belonging to the technical field of pseudoboehmite preparation. The method includes: mixing an aluminum salt solution and a sodium aluminate solution in parallel flow and performing a low-temperature neutralization reaction; adding a low-concentration water glass 5-8 minutes after the start of the reaction, ensuring the water glass addition ends before the neutralization reaction ends, to obtain an amorphous precursor; separating the amorphous precursor into a liquid and solid state to obtain a filter cake; mixing the filter cake with deionized hydrated slurry to obtain a slurry; adding sodium carbonate to the slurry to adjust the pH to 8-9 to obtain an alkaline slurry; subjecting the alkaline slurry to an aging and crystallization reaction at high temperature to obtain a pseudoboehmite slurry; filtering and washing the pseudoboehmite slurry to obtain a silicon-modified macroporous pseudoboehmite filter cake, and then drying it to obtain silicon-modified macroporous pseudoboehmite.

The invention discloses a silicon oxide microsphere as well as a preparation method and application thereof. The silicon oxide microspheres are large-aperture silicon oxide microspheres, the specific surface area is 395-750m < 2 > / g, the pore volume is 1.0-3.5 ml / g, and the average aperture is 17-50nm. The silicon oxide microspheres have the characteristics of large specific surface area, large pore volume and large pore diameter, and the catalyst prepared by using the silicon oxide microspheres as the carrier has the advantage that the activity is remarkably improved when the catalyst is applied to olefin polymerization reaction.

This invention discloses a method for preparing silica microspheres, the prepared silica microspheres, and their applications. The method for preparing silica microspheres includes: (1) heating a mixture of n-alkane and pitch under reflux to separate a solid product; (2) mixing the solid product from step (1) with a mixture of aromatics I, a first silicon source, a polyoxyethylene-polyoxypropylene-polyoxyethylene copolymer, and water to obtain a crystallization solution, followed by hydrothermal crystallization and calcination to obtain an intermediate product; (3) mixing the intermediate product from step (2), a second silicon source, a pore-forming agent, and water to obtain a slurry; then, spray-drying and calcining the slurry to obtain the silica microspheres. The silica microspheres prepared by this method have the advantages of large specific surface area, large pore volume, and large average pore size, which significantly improves polymerization activity in olefin polymerization reactions.

This invention relates to the field of hydrocracking catalysts, and discloses a hydrocracking catalyst, its preparation method and application, and a method for hydrocracking treatment of residue oil. The hydrocracking catalyst contains molecular sieves, silicon-modified alumina, and active metal components. Optionally, the hydrocracking catalyst also contains alumina and / or additives. The content of the molecular sieve is 5-25 wt%, the content of the silicon-modified alumina is 30-60 wt%, and the content of the alumina is 0-20 wt%. The content of the active metal components, calculated as oxides, is 5-35 wt%, and the content of the additives, calculated as oxides, is 0-1.0 wt%. The catalyst provided by this invention has the advantages of large specific surface area, large pore volume, large pore size, and high metal content. When used in the hydrocracking treatment of residue oil, it not only exhibits high activity and good stability, but also improves naphtha selectivity, expands feedstock adaptability, and reduces hydrogen consumption.

The application discloses a methanol steam hydrogen production catalyst and a preparation method and application thereof, and belongs to the hydrogen production technical field. The preparation method of the methanol steam hydrogen production catalyst comprises the following steps: (1) dissolving aluminum salt, copper salt and zinc salt in deionized water to obtain a mixed salt solution; stirring and uniformly mixing anhydrous ethanol solution of a surfactant, adjusting the pH value to 6.5-7.5 by using lye, standing and aging at room temperature, and obtaining a precursor through filtering, washing and drying; and (2) placing the precursor into a tube furnace to perform calcination, and obtaining the methanol steam hydrogen production catalyst. The methanol steam hydrogen production catalyst prepared by the application has a relatively high specific surface area, a relatively large pore size and a pore volume, and has a relatively high conversion rate, a relatively high stability and a relatively low CO selectivity when being used for catalyzing hydrogen production from methanol steam.

This invention relates to a nickel metal embedded porous carbon adsorbent, its preparation method, and its application, comprising the following steps: S1, adding a nickel salt solution dropwise to nano-silica, drying it, and then adding biomass for grinding; S2, pre-carbonizing the product after grinding in step S1 at a low temperature; S3, carbonizing the product after pre-carbonization in step S2 at a high temperature under inert gas protection; S4, adding an alkaline solution to the product after high-temperature carbonization in step S3 to remove the nano-silica, thereby obtaining the nickel metal embedded porous carbon adsorbent. Compared with the prior art, this invention has a unique embedded structure, which improves the stability of the metal sites, and has a large specific surface area and pore volume, thereby improving the selective adsorption capacity for Xe and effectively separating Kr and Xe.