摘要:
Disclosed herein is a hydrogen generator for producing hydrogen by the steam-reforming reaction of hydrocarbons, in which a pressure loss induction structure for artificially reducing the pressure of exhaust gas is provided between a combustion unit and an exhaust gas discharge pipe, thus improving the uneven distribution of exhaust gas.
摘要:
Disclosed herein is a hydrogen generator for producing hydrogen by the steam-reforming reaction of hydrocarbons, in which a pressure loss induction structure for artificially reducing the pressure of exhaust gas is provided between a combustion unit and an exhaust gas discharge pipe, thus improving the uneven distribution of exhaust gas.
摘要:
Disclosed herein is an apparatus for generating hydrogen by steam reforming. The apparatus comprises: a casing having provided in the central portion thereof a combustion section for producing high-temperature reaction heat; a flame guide provided such that it forms the outer wall of the combustion section while a space is provided outside thereof; a plurality of catalytic tubes arranged concentrically with respect to the combustion section in the space outside the flame guide; a feed supply manifold disposed at one side of the inside of the casing so as to distribute a feed supplied from the outside of the apparatus to each of the catalytic tubes; a reformate manifold connected with one end of each of the catalytic tubes so as to discharge a reformate obtained by the reforming reaction to the outside of the apparatus; and a support member which consists of an inner ring plate formed at one side of the inside of the casing and an outer ring plate disposed concentrically around the outer circumference of the inner ring plate and which has formed at the boundary between the inner and outer ring plates tube holes into which one end of each of the catalytic tubes is inserted. In the hydrogen generating apparatus, the structure of the support member supporting the plurality of catalytic tubes is simply divided into the inner ring plate and the outer ring plate, such that the expansion and shrinkage of the support member by thermal stress can be efficiently compensated for. As a result, deformation and breakdown of the support member caused by thermal stress can be prevented, thus improving the overall durability and stability of the hydrogen generating apparatus.
摘要:
Provided are a phase-change memory device using insulating nanoparticles, a flexible phase-change memory device and a method for manufacturing the same. The phase-change memory device includes an electrode, and a phase-change layer in which a phase change occurs depending on heat generated from the electrode, wherein insulating nanoparticles formed from a self-assembled block copolymer are provided between the electrode and the phase-change layer undergoing crystallization and amorphization.
摘要:
The present invention relates to a bifunctional catalyst for a hydrodewaxing process with improved isomerization selectivity, and to a method for manufacturing the same, and more particularly to a bifunctional catalyst and to a method for manufacturing same, which is characterized in that EU-2 zeolite with a controlled degree of phase transformation is used as a catalyst support having an acid site. The EU-2 zeolite, the degree of phase transformation of which is controlled, includes, by controlling synthesis parameters of EU-2, predetermined amounts of materials that are phase-transformed from EU-2 crystals such as cristobalite and quartz. The metal loaded bifunctional catalyst according to the present invention improves selectivity of the isomerization process, rather than a cracking reaction, during a hydroisomerization reaction of n-hexadecane. Therefore, the bifunctional catalyst can be widely used as a catalyst for a dewaxing process such as lubricant base oil and diesel oil.
摘要:
Provided is a process for isolating a catalyst from a solution having a copolymer and a catalyst dissolved therein, after performing copolymerization with the catalyst. More specifically the invention provides selection and application of an adsorbent to be used for the isolation.
摘要:
Provided is a process for isolating a catalyst from a solution having a copolymer and a catalyst dissolved therein, after performing copolymerization with the catalyst. More specifically the invention provides selection and application of an adsorbent to be used for the isolation.
摘要:
The present invention relates to a bifunctional catalyst for a hydrodewaxing process with improved isomerization selectivity, and to a method for manufacturing the same, and more particularly to a bifunctional catalyst and to a method for manufacturing same, which is characterized in that EU-2 zeolite with a controlled degree of phase transformation is used as a catalyst support having an acid site. The EU-2 zeolite, the degree of phase transformation of which is controlled, includes, by controlling synthesis parameters of EU-2, predetermined amounts of materials that are phase-transformed from EU-2 crystals such as cristobalite and quartz. The metal loaded bifunctional catalyst according to the present invention improves selectivity of the isomerization process, rather than a cracking reaction, during a hydroisomerization reaction of n-hexadecane. Therefore, the bifunctional catalyst can be widely used as a catalyst for a dewaxing process such as lubricant base oil and diesel oil.
摘要:
Provided are a phase-change memory device using insulating nanoparticles, a flexible phase-change memory device and a method for manufacturing the same. The phase-change memory device includes an electrode, and a phase-change layer in which a phase change occurs depending on heat generated from the electrode, wherein insulating nanoparticles formed from a self-assembled block copolymer are provided between the electrode and the phase-change layer undergoing crystallization and amorphization.