74results about How to "Good channel structure" patented technology

The invention relates to a preparation method of a productive propylene fluidized catalytic cracking (FCC) catalyst. The preparation method comprises the following steps of: mixing and pulping 530 parts by weight of H-ZSM-5 molecular sieve, 20 to 40 parts by weight of USY molecular sieve, 40 to 70 parts by weight of natural clay and 5 to 20 parts by weight of a binder for 30 to 60 minutes to obtain a mixture, wherein the adding amount of the binder is counted on the basis of silica; standing the pulped mixture for 1 to 4 hours, continuously pulping for 10 to 30 minutes, naturally drying, and drying in a drying oven at 100 to 120 DEG C for 4 to 8 hours; placing the dried product into a muffle furnace, heating to 500 to 650 DEG C, roasting for 2 to 6 hours and naturally cooling to prepare the productive propylene FCC catalyst of 100 to 200 meshes. The productive propylene FCC catalyst prepared by the method provided by the invention has the advantages of high conversion rate of heavy oil, high propylene selectivity and low yield of dry gas and coke. In addition, the preparation method of the catalyst is simple and low in cost and has good industrial application prospect.

The invention relates to a sulfur-doped hard carbon material, its preparation method and a potassium ion battery as a negative electrode. The hard carbon material has a porous structure, and the sulfur atoms are at least partially distributed inside the hard carbon material. The preparation method of the hard carbon material comprises: (1) acid-washing high-sulfur coal, and then immersing in an alkaline solution to obtain a pre-product; (2) heat-treating the pre-product under a protective atmosphere to obtain Hard carbon material; (3) soaking, washing, filtering and drying the hard carbon material in acid solution. The invention uses high-sulfur coal as raw material, and the pore size of the prepared hard carbon material can meet the requirements of potassium ion intercalation / extraction. At the same time, the sulfur element is in-situ self-doped on the surface of the material and in the carbon matrix, endowing the material with a new Electrochemical activity and more ideal pore structure. The sulfur element distribution in the carbon material prepared by the invention is more uniform, and the production cost is lower.

The invention discloses a cellular Mn-Ti-based catalyst for low-temperature selective catalytic reduction (SCR) denitration reaction, and a preparation method and a using method. The catalyst comprises the following components in molar percent: 40 to 60 percent of TiO2, 5 to 16 percent of MnO2, 3 to 7 percent of Mn2O3, 2 to 4 percent of Mn3O4, 2 to 8 percent of CeO2, 1 to 3 percent of V2O5, 0.5 to 1 percent of Se, 0.5 to 1 percent of Sb, and 0.15 to 1.5 percent of Bi. The preparation method comprises the following steps of: first preparing Mn-Ti catalyst powder by a hydrothermal method, and then preparing modified cellular Mn-Ti-based catalyst by processes such as extrusion forming, soaking and the like so as to improve the low temperature SCR activity and the sulfur poisoning resisting capability of the catalyst. Furthermore, the catalyst prepared by the method has the advantages of high mechanical strength, high dispersibility of active substances and difficult sintering, can be applied to the low temperature SCR denitration reaction of flue gas, is directly arranged behind a dust removing device even a desulfurizing device, can greatly reduce the operational temperature and operation cost of the traditional SCR process, and has high nitrogen oxide removing rate at the temperature of about 100 DEG C.