Abstract: An outdoor electric cabinet and an air duct structure thereof are provided. The air duct structure is used to guide airflow to an air inlet side of a fan. The air duct structure includes an air inlet port, a flow-guiding cavity and an air distribution assembly. The air inlet port is configured to introduce external airflow into the air duct structure. The flow-guiding cavity is formed between the air inlet port and the air inlet side of the fan. The air distribution assembly is arranged in the flow-guiding cavity to uniformly distribute an air suction force of the air inlet port. The airflow suction force at the air inlet port is distributed more uniformly by the air distribution assembly, which effectively weakens the maximum wind speed on the shortest path.

Abstract: The present disclosure provides a low-molecular mass organic gellant and a preparation method and use thereof, belonging to the technical field of gelled fuels. The low-molecular mass organic gellant has a cyclopropane structure. The cyclopropane structure belongs to a high-tension structure, which endows the gellant with excellent gel properties; in addition, the high-tension cyclopropane structure is also capable of greatly improving a combustion performance of the gellant, shortening an ignition delay time of the fuel, and promoting combustion. Moreover, multiple hydroxyl groups contained in the low-molecular mass organic gellant is capable of effectively forming a gel through hydrogen bonding; therefore, the gellant has excellent gel and shear thinning properties for high-energy density fuel and energetic nanofluid fuel, with a critical gellant concentration of not greater than 1% when forming a stable gel.

Abstract: The present disclosure provides a low-molecular mass organic gellant and a preparation method and use thereof, belonging to the technical field of gelled fuels. The low-molecular mass organic gellant has a cyclopropane structure. The cyclopropane structure belongs to a high-tension structure, which endows the gellant with excellent gel properties; in addition, the high-tension cyclopropane structure is also capable of greatly improving a combustion performance of the gellant, shortening an ignition delay time of the fuel, and promoting combustion. Moreover, multiple hydroxyl groups contained in the low-molecular mass organic gellant is capable of effectively forming a gel through hydrogen bonding; therefore, the gellant has excellent gel and shear thinning properties for high-energy density fuel and energetic nanofluid fuel, with a critical gellant concentration of not greater than 1% when forming a stable gel.

Abstract: Provided is a p-type TiO2/n-type WO3 heterojunction catalyst and a preparation method and use thereof. The catalyst comprises p-type TiO2 and n-type WO3 supported on a surface of the p-type TiO2.

Abstract: The present disclosure relates to the field of the catalytic technologies, and provides a p-type TiO2/n-type WO3 heterojunction catalyst and its preparation and use in photochemical synthesis of fuels. The catalyst comprises p-type TiO2 and n-type WO3 supported on a surface of the p-type TiO2. The disclosure proposes to support n-type WO3 onto a surface of p-type TiO2. The catalyst has high catalytic efficiency, and is particularly suitable for use in photocatalytic processes for synthesizing fuels.

Abstract: A drinking cup having a receptacle with an open end and a lid assembly configured for releasable engagement with the receptacle over the open end. A lid assembly wall has an inner surface and an inner ring extending radially inward therefrom. The inner ring defines a plurality of fluid passages. A seal assembly is configured to be retained by the inner ring, with the seal assembly being resiliently deformable between a sealed configuration and an unsealed configuration. In the sealed configuration, the upper lip sealingly engages the inner surface and fluid is prevented from flowing through a lid assembly volume defined between the lid assembly and the seal assembly. In the open configuration fluid is permitted to flow from the receptacle, through the plurality of fluid passages, and between a gap defined by a portion of the seal lip and a corresponding portion of the sealing surface.

Abstract: A valve assembly for a leak resistant drinking cup includes a tubular plug having an outer wall, an inner wall, and a web extending between and connecting the outer and inner walls. The web has at least one slit disposed intermediate the inner and outer walls. The valve assembly is configurable between a sealed position wherein liquid is inhibited from passing through the slit and an unsealed position wherein liquid can pass through the slit.

Abstract: A process for preparing a fused-ring alkane fuel, wherein the fused-ring alkane fuel has the following structure: wherein n is 1 or 2; R1, R2, R3, R4 and R5 are H or —CH3 or —CH2CH3; the fused-ring alkane fuel has a density of greater than 0.870 g/cm3, a freezing point of not higher than ?50° C., and a net mass heat value of not less than 42.0 MJ/kg; the process for preparing a fused-ring alkane fuel, wherein the process includes steps of: (1) in a presence of ultraviolet light and a photocatalyst, a Diels-Alder cycloaddition reaction between a substituted or unsubstituted cyclic enone and a substituted or unsubstituted furan molecule occurs to produce a fuel precursor molecule: (2) the fuel precursor molecule obtained in the step (1) is subjected to hydrodeoxygenation to produce the fused-ring alkane fuel.

Abstract: A process for preparing a fused-ring alkane fuel, wherein the fused-ring alkane fuel has the following structure: wherein n is 1 or 2; R1, R2, R3, R4 and R5 are H or —CH3 or —CH2CH3; the fused-ring alkane fuel has a density of greater than 0.870 g/cm3, a freezing point of not higher than ?50° C., and a net mass heat value of not less than 42.0 MJ/kg; the process for preparing a fused-ring alkane fuel, wherein the process includes steps of: (1) in a presence of ultraviolet light and a photocatalyst, a Diels-Alder cycloaddition reaction between a substituted or unsubstituted cyclic enone and a substituted or unsubstituted furan molecule occurs to produce a fuel precursor molecule: (2) the fuel precursor molecule obtained in the step (1) is subjected to hydrodeoxygenation to produce the fused-ring alkane fuel.

Abstract: A process for preparation of a bicyclic fused-ring alkane. In the presence of a bifunctional solid catalyst, one or more cyclitols undergo a C—C coupling reaction with itself or each other at a temperature and in a nitrogen gas atmosphere, to produce a bicyclic alkane precursor mixture; then, the nitrogen gas is replaced by hydrogen gas, and the bicyclic alkane precursor mixture is hydrogenated or hydrodeoxygenated at a temperature and under a pressure, to produce the bicyclic fused-ring alkane. The proportion of the bicyclic fused-ring alkane in the product as prepared according to the process is not lower than 80 wt %.

Abstract: A valve assembly for a leak resistance drinking cup is selectively configurable between a sealed position and an unsealed position. The valve assembly includes a plug having an inner surface, an outer surface, and an opening extending through the plug from the outer surface to the inner surface. An amount of vacuum acting on the outer surface of the plug needed to move the valve assembly from the sealed position to the unsealed position is less than the amount of internal pressure acting on the inner surface of the plug needed to move the valve assembly from the sealed position to the unsealed position.

Abstract: A bottle brush includes a handle and a brush head connected to the handle. The brush head has a longitudinal axis and further includes a barrel having a sidewall substantially parallel to the longitudinal axis. A first row of bristles extends from the sidewall at least in part transversely from the barrel to define a first bristle reach. At least two second rows of bristles extend from the sidewall at least in part transversely from the barrel to define a second bristle reach different from the first bristle reach. The at least two second rows of bristles may be spaced longitudinally from each other with the first row of bristles being longitudinally intermediate to the second rows of bristles.

Abstract: The present invention discloses a process for preparing perhydrofluorene or alkyl-substituted perhydrofluorene, comprising the steps of: (1) reacting a phenolic compound or an aromatic hydrocarbon compound or an aromatic ketone compound or an aromatic ether compound with a benzyl compound to carry out an alkylation reaction in the presence of a first catalyst, thereby to produce substituted or unsubstituted diphenyl methane, wherein the first catalyst is an acidic catalyst; and (2) reacting the substituted or unsubstituted diphenyl methane with hydrogen gas to carry out an hydrogenation reaction or a hydrodeoxygenation reaction, thereby to produce perhydrofluorene or alkyl-substituted perhydrofluorene, wherein the second catalyst is a physical mixture of a metal catalyst and an acidic catalyst or a metal catalyst loaded on an acidic catalyst.

Abstract: A lid assembly includes a closure member and a valve assembly. The closure member has a socket in fluid communication with a liquid passageway. The socket has a wall with a cutout therein. The valve assembly includes a plug adapted for insertion into the socket to form a seal between the socket and the plug. The plug has a base, a side wall, and an interior chamber cooperatively defined by the base and the side wall. A portion of the side wall of the plug with a minimum thickness is disposed adjacent the cutout when the plug is inserted into the socket. The seal formed between the plug and socket is selectively moveable from a sealed configuration to an unsealed configuration by vacuum pressure being applied to the interior chamber of the plug.

Abstract: The present invention discloses a process for preparing perhydrofluorene or alkyl-substituted perhydrofluorene, comprising the steps of: (1) reacting a phenolic compound or an aromatic hydrocarbon compound or an aromatic ketone compound or an aromatic ether compound with a benzyl compound to carry out an alkylation reaction in the presence of a first catalyst, thereby to produce substituted or unsubstituted diphenyl methane, wherein the first catalyst is an acidic catalyst; and (2) reacting the substituted or unsubstituted diphenyl methane with hydrogen gas to carry out an hydrogenation reaction or a hydrodeoxygenation reaction, thereby to produce perhydrofluorene or alkyl-substituted perhydrofluorene, wherein the second catalyst is a physical mixture of a metal catalyst and an acidic catalyst or a metal catalyst loaded on an acidic catalyst.

Abstract: A valve assembly for a leak resistant drinking cup includes a tubular plug having an outer wall, an inner wall, and a web extending between and connecting the outer and inner walls. The web has at least one slit disposed intermediate the inner and outer walls. The valve assembly is configurable between a sealed position wherein liquid is inhibited from passing through the slit and an unsealed position wherein liquid can pass through the slit.

Abstract: A drinking cup having a receptacle with an open end and a lid assembly configured for releasable engagement with the receptacle over the open end. A lid assembly wall has an inner surface and an inner ring extending radially inward therefrom. The inner ring defines a plurality of fluid passages. A seal assembly is configured to be retained by the inner ring, with the seal assembly being resiliently deformable between a sealed configuration and an unsealed configuration. In the sealed configuration, the upper lip sealingly engages the inner surface and fluid is prevented from flowing through a lid assembly volume defined between the lid assembly and the seal assembly. In the open configuration fluid is permitted to flow from the receptacle, through the plurality of fluid passages, and between a gap defined by a portion of the seal lip and a corresponding portion of the sealing surface.

Abstract: The present invention discloses a composite catalyst for the photocatalytic isomerization of norbornadiene to prepare quadricyclane, comprising: a solid photocatalyst, selected from the group consisting of TiO2, Ti-MCM-41, Ti-SBA-15, ZnO, WO3, Ta2O5 or SrTiO3; and an organic photo-sensitizer loaded on the surface or in the channel of said solid photocatalyst, selected from benzophenone, acetophenone, Michler's Ketone, tetraethyl Michler's Ketone, and diethyl Michler's Ketone, where the organic photo-sensitizer is present in the solid photocatalyst in an amount of 0.5% to 20% by weight. The catalyst of the invention can catalyze a target reaction under the condition that no solvent is used, and the yield of the target product quadricyclane is higher. Furthermore, the catalyst of the invention has a stable activity, and it can be recycled. The invention further discloses a process for preparing the composite catalyst.

Abstract: The invention discloses a continuous process for producing high-pure quadricyclane, in which “a reaction-rectification integral process” or “a reaction followed by rectification process” may be employed. The two processes both use a novel composite catalyst which is obtained by loading an organic photo-sensitizer on a solid photocatalyst, and the composite catalyst has a high activity and a good stability. In the reaction-rectification integral process, the composite catalyst is used by being blended with rectification fillers or covering the rectification fillers, so as to achieve the integration of the reaction and the rectification. In the reaction followed by rectification process, the composite catalyst and the rectification fillers are placed separately from each other. The two processes achieve a relatively short residence time of reactants, produce highly-pure quadricyclane, and reduce the formation of cokes.

Abstract: A bottle brush includes a handle and a brush head connected to the handle. The brush head has a longitudinal axis and further includes a barrel having a sidewall substantially parallel to the longitudinal axis. A first row of bristles extends from the sidewall at least in part transversely from the barrel to define a first bristle reach. At least two second rows of bristles extend from the sidewall at least in part transversely from the barrel to define a second bristle reach different from the first bristle reach. The at least two second rows of bristles may be spaced longitudinally from each other with the first row of bristles being longitudinally intermediate to the second rows of bristles.