5results about How to "Increased internal surface area" patented technology

The invention provides a nitrogen-doped hierarchical pore carbon material as well as a preparation method and application thereof, and the preparation method comprises the following steps: sequentially dissolving urea, alkali metal hydroxide and / or a pore-forming agent in water to obtain a mixed solution, cooling the mixed solution, adding cellulose-based biomass, and dissolving the cellulose-based biomass to obtain transparent sol; freezing the transparent sol into a solid, and performing vacuum freeze drying to obtain a white loose solid; mixing and grinding the liquid polymeric monomer and the white loose solid, and performing heat treatment to obtain a solid product; and carbonizing the solid product in an inert atmosphere, and then pickling and washing the carbonized product. According to the preparation method, chain-shaped arrangement in cellulose-based biomass molecules is converted into three-dimensional net-shaped arrangement through dissolution, macropores are formed, a macropore framework is kept stable and does not collapse in the carbonization process through polymerization reaction, and the formed hierarchical pore carbon material has a micropore / mesopore / macropore coexisting three-dimensional structure and controllable specific surface area and pore size distribution; meanwhile, in-situ nitrogen doping can also be realized.

The utility model belongs to the technical field of roll shafts, and particularly relates to a self-lubricating anti-abrasion type roll shaft sleeve combined structure which comprises a roll shaft body. The interior of the roll shaft body is hollow; a connecting rod is fixedly connected to the interior of the roll shaft body; the middle part of the connecting rod is rotationally connected with a plurality of connecting rings; the connecting rings are distributed in a linear array state; a plurality of fan blades are fixedly connected to the middle part of the connecting ring; the fan blades are distributed in a circumferential array state; a plurality of heat dissipation holes are formed in the end part of the roll shaft body; the heat dissipation holes are distributed in a circumferential array state; the end part of the roll shaft body is fixedly connected with two connecting shafts; through the structure, air circulation can be effectively formed, dissipation of heat in the roll shaft body is accelerated, the temperature of all parts of the roll shaft body is more uniform, thermal deformation caused by local overheating of the roll shaft body is reduced, and the inner surface area of the roll shaft body is increased through the hollow structure in the roll shaft body; and the heat can be more sufficiently transferred into the air.

The application discloses a gradient temperature and pressure reaction kettle for preparing a furfural composite catalyst and a control method thereof, and relates to the technical field of reaction kettles. The gradient temperature and pressure reaction kettle for preparing the furfural composite catalyst comprises a reaction kettle body provided with a feeding pipe and a discharging pipe, and further comprises a vertical pipe rotatably installed in the reaction kettle body, wherein an outer wall of the vertical pipe is provided with a horizontal frame, a plurality of longitudinally arranged stirring rods are installed on the horizontal frame, and an inner heat exchange assembly is arranged in the vertical pipe; a plurality of circumferentially distributed protruding portions are arranged at equal intervals on an inner wall of the reaction kettle body, wherein the two sides of the protruding portions and the inner wall of the reaction kettle body are connected through inclined surfaces; through the arrangement of the cavity and the heat exchange cavity, the raw materials in and outside the reaction kettle body can be heated at the same time, so that the raw materials are heated more uniformly, and the final quality and efficiency of the catalyst are also significantly improved.

The utility model discloses a thermal relay and a combined structure of the thermal relay and a contactor. A rear cover plate; the penetrating pipes are fixed and arranged on the outer wall face of the rear cover plate in a protruding mode, the rod type terminals are arranged in the penetrating pipes in a penetrating mode, one ends of the rod type terminals are connected with the thermal tripping mechanism, and the other ends of the rod type terminals are located outside the penetrating pipes; the lower buckles are fixedly arranged on the outer wall face of the rear cover plate at intervals, the lower buckles and the penetrating pipes are located at the two ends of the rear cover plate in the length direction respectively, and buckling parts buckled with the ends of the lower buckles are arranged on a shell of the contactor; when the rod type terminal is connected with a wiring terminal of the contactor and the lower buckle is buckled with the buckling part, the penetrating pipe is in contact with the contactor shell, and the penetrating pipe and the lower buckle support the rear cover plate at the same time, so that a connection gap is kept between the rear cover plate and the contactor shell, and the connection gap is used for heat dissipation of the thermal relay. The strength of the connection structure between the combined thermal relay and the contactor is improved, heat dissipation of the thermal relay is facilitated, and action response and reset time of the thermal relay are ensured to accord with set parameters.

The application provides derived plant-based porous carbon and a preparation method and application thereof. The application uses bean sprout biomass as a precursor of activated carbon electrode material for supercapacitors, effectively improves the uniformity of the prepared activated carbon, and further explores a suitable green preparation method and an electrochemical performance optimization mechanism. Specifically, the application takes green bean sprouts as a representative derived plant as a precursor of activated carbon for supercapacitors, and on this basis, a series of related quality improvement modification work is carried out from two aspects of pore structure adjustment and nitrogen atom doping, provides a reference for high-value utilization of biomass and preparation of activated carbon for supercapacitors, and therefore has good practical application value.