摘要:
An adsorption heat pump includes a working fluid, an adsorption-desorption unit, and an evaporation-condensation unit connected with the adsorption-desorption unit. The adsorption-desorption unit adsorbs and desorbs vapor resulting from the working fluid, and includes an adsorbent being a porous substance. The porous substance has pores, and exhibits a pore diameter distribution curve having a maximum peak falling in a pore diameter range of from 1 to 10 nm. The pores in the diameter range of .+-.40% of pore diameter at the maximum peak have pore volume not less than 60% of a whole volume of the porous substance. The evaporation-condensation unit evaporates and condenses the working fluid. The adsorption heat pump can be operated by a low-temperature heat source, and can exhibit a large pumping temperature difference regardless of its small size.
摘要:
A process for manufacturing a silica porous material with high solid acidity, catalytic activity and adsorption ability as well as excellent crystallinity and heat resistance has the steps of adding a compound of metallic element such as Al to a waterglass, aging the resultant mixture, calcining the aged mixture to form a layered crystal, incorporating an organic substance between layers of the layered crystal, calcining the resultant layered crystal for crosslinking the layered crystal. By this process, a plurality of layers formed of SiO.sub.4 tetrahedral and metallic oxide constitute a silica porous material, and the gap between adjacent layers of the layered crystal is reduced at a crosslinking site, while the gap of the other portion is expanded to form a micro pore.
摘要:
A process for producing a heat-resistant and high-purity porous silicon oxide material having excellent crystallinity and uniformity in pore size. The process includes: a first step of dispersing a substance containing silicon in an aqueous solution of a surfactant and adjusting the pH of the dispersion to a value of 10 or higher; a second step of adjusting the pH thereof to a value lower than 10 and forming a composite of a silicon oxide and a surfactant; and a third step of removing the surfactant from the composite. A water-soluble component is preferably removed from the dispersion between the first and second steps.
摘要:
The membrane electrode assembly 1 has an anode 10, a cathode 20, and an electrolyte membrane 30 disposed between the anode and cathode; the anode and cathode are gas diffusion electrodes; the electrolyte membrane contains a solid electrolyte in which a plurality of pores with mean pore diameters of 1 to 30 nm are formed; and the solid electrolyte has a backbone comprising organic groups having one or more metal atoms, oxygen atoms bonded to the metal atoms, and carbon atoms bonded to the metal atoms or oxygen atoms, and also has functional groups with ion-exchange capabilities that are bonded to the organic groups in the pores.
摘要:
Composite material with high mechanical strength and excellent high-temperature characteristics comprising a polymer matrix containing polyamide and layers of a silicate uniformly dispersed in the order of molecules in the polymer matrix, each of said silicate layers being 7 to 12 Å thick and the interlayer distance being at least 20 Å; and a process for manufacturing such composite material.
摘要:
The present cluster-included material characterized by utilizing a porous host material for clusters having a pore larger in size than that of zeolite. The cluster-included material is obtained by forming a cluster in a pore of a mesoporous material having a pore size of 1.3 to 10 nm. When the mesoporous material is particularly a mesoporous material having a pore volume of not less than 60% of a total pore volume within a pore size range of -40 to +40% of a pore size which shows a maximum peak in a pore size distribution curve, a granular cluster having a uniform particle size or a fine-linear cluster having a uniform diameter is obtained. The cluster-included material performs the various quantum effects.
摘要:
A porous material composed of many SiO.sub.4 tetrahedra sheets having interlayer bridges of SiO.sub.2. It has pores having a diameter of 10 .ANG. or above, and possesses the properties of a solid acid formed by the isomorphous substitution of metal atoms for Si of SiO.sub.4 frameworks. It is made by a process including introducing an organic substance into interlayer space of crystals of layered silicates to expand the spacing between crystal layers, as well as forming bridges of SiO.sub.2 therebetween, bringing the intercalated compounds into contact with a metal salt to link metal atoms to the SiO.sub.4 frameworks, and firing the products. The material can withstand a temperature of 800.degree. C., has a pore diameter larger than that of zeolites, etc., and is useful in making an adsorbent or catalyst for molecules having a high molecular weight, such as a catalyst for the catalytic cracking of petroleum.
摘要:
An exhaust gas purifying catalyst is characterized in that at least one kind of catalyst metal is loaded on a layered porous silica or a layered porous silica-metal oxide. The exhaust gas purifying catalyst is used as an oxidation catalyst for purifying hydrocarbon and carbon monoxide, or a reduction catalyst for purifying nitrogen oxides (NO.sub.x), which is suitable for purifying exhaust gases in automobiles. An exhaust gas purifying apparatus includes the above exhaust gas purifying catalyst and an absorbent for trapping hydrocarbon components, in which aromatic HC such as trimethylbenzene and the like are effectively trapped.
摘要:
Provided is a mesopore material and the manufacturing method thereof characterized by having uniform diameter of each pore as well as a high crystallographic regularity, comprising primary particles having a small axe with uniformity, allowing for synthesizing the primary particles with the size freely controlled, and allowing for simple manufacturing at a reduced cost. The mesopore material comprising: pores having a diameter in a range of 2 to 10 nm; and a primary particle having a major axe in a range of 10 nm to 1 .mu.m. The diameter range is defined at a maximum peak in a pore distribution curve, and 75% or more of the pores is in a diameter range of -40% to +40% of the pore diameter at the maximum peak. Further provided is a laminar silicic acid composed of the uninvertible tetrahedral sheet and has a uniform shape and size. Also provided is a laminar silicic acid salt composed of the uninvertible tetrahedral sheet and has a uniform shape and size. The laminar silicic acid comprising a laminar silicon dioxide having a laminar six-membered ring skeleton and having a crystallographic regularity. A skeleton of a clay mineral having a 1:1 laminar structure or a 2:1 laminar structure consisting of an uninvertible tetrahedral sheet of a silicon dioxide and an octahedral sheet of an oxide of a metal remains in the laminar silicic acid. Acid acts on the clay mineral to form the laminar silicic acid.
摘要:
The method for producing a bulk silica porous material is presented. The obtained material has a large crystal size serving to reduce light scattering, and uniform and adjustable pore size. This can be utilized for optical and electronic functional materials. The method comprises the steps of:forming a silica/surfactant composite by mixing starting materials containing an alkoxysilane, water and a surfactant and allowing to the starting materials to react;maturing said silica/surfactant composite by allowing the same to stand in a closed container to effect the development of a silica network structure and the formation of porous structure in said composite;drying said matured silica/surfactant composite for removing the solvent and for condensation of said matured silica/surfactant composite; and,sintering said condensed silica/surfactant composite to remove the surfactant to obtain a silica porous material.