Abstract: According to one embodiment of the present invention, a tube opening and closing device capable of opening and closing a lid of a tube and comprising a container, a lid coupled to the container so as to enable the container to be blocked, and a joint part for connecting the container and a first side of the lid comprises: a tube supporting rack having a plurality of openings formed on one surface thereof, wherein the containers of the tubes can be inserted into each of the plurality of openings; an opening and closing part positioned at an upper part of the tube supporting rack, rotating around a first rotary shaft and having a coupling groove in which a second side of the lid, which faces the first side of the tube, can be accommodated; and a driving part for rotating the opening and closing part, wherein the lid can be opened and closed with respect to the container through the rotation of the opening and closing part.

Abstract: According to one embodiment of the present invention, a tube opening and closing device capable of opening and closing a lid of a tube and comprising a container, a lid coupled to the container so as to enable the container to be blocked, and a joint part for connecting the container and a first side of the lid comprises: a tube supporting rack having a plurality of openings formed on one surface thereof, wherein the containers of the tubes can be inserted into each of the plurality of openings; an opening and closing part positioned at an upper part of the tube supporting rack, rotating around a first rotary shaft and having a coupling groove in which a second side of the lid, which faces the first side of the tube, can be accommodated; and a driving part for rotating the opening and closing part, wherein the lid can be opened and closed with respect to the container through the rotation of the opening and closing part.

Abstract: Disclosed is a novel catalyst for producing a methanol precursor. The use of the catalyst enables the production of a methanol precursor and methanol with high efficiency under low temperature and low pressure conditions. Also disclosed are a methanol precursor produced using the catalyst and methanol produced using the methanol precursor.

Abstract: The apparatus includes: a pretreatment tank where biomass and a first acid solution are stirred to extract sugar components from the biomass; a hydrolysis tank where water is added to the pretreated mixture transferred from the pretreatment tank such that the concentration of the acid is reduced and the sugar components are hydrolyzed to produce an acid hydrolyzate; a first sugar-acid separation tank where the acid hydrolyzate is separated into a second acid solution and a first hydrolyzate; a second sugar-acid separation tank where the first hydrolyzate is separated into a third acid solution and a second hydrolyzate; a fermentation tank where the second hydrolyzate is fermented to produce bioenergy; and an acid solution concentration tank where a mixture of the second acid solution transferred from the first sugar-acid separation tank and the third acid solution transferred from the second sugar-acid separation tank is concentrated to a higher level for reuse.

Abstract: Disclosed is a novel catalyst for producing a methanol precursor. The use of the catalyst enables the production of a methanol precursor and methanol with high efficiency under low temperature and low pressure conditions. Also disclosed are a methanol precursor produced using the catalyst and methanol produced using the methanol precursor.

Abstract: The apparatus includes: a pretreatment tank where biomass and a first acid solution are stirred to extract sugar components from the biomass; a hydrolysis tank where water is added to the pretreated mixture transferred from the pretreatment tank such that the concentration of the acid is reduced and the sugar components are hydrolyzed to produce an acid hydrolyzate; a first sugar-acid separation tank where the acid hydrolyzate is separated into a second acid solution and a first hydrolyzate; a second sugar-acid separation tank where the first hydrolyzate is separated into a third acid solution and a second hydrolyzate; a fermentation tank where the second hydrolyzate is fermented to produce bioenergy; and an acid solution concentration tank where a mixture of the second acid solution transferred from the first sugar-acid separation tank and the third acid solution transferred from the second sugar-acid separation tank is concentrated to a higher level for reuse.

Abstract: The present invention relates to a portable flashlight, and more particularly to a portable flashlight which has a wireless switching function for turning on or off the flashlight by means of a radio signal in addition to a manual switch provided on the outside of the flashlight. The flashlight can not only be turned on or off by means of an external radio signal, but also be used in various ways such as turning on a part of the lamp or intermittently turning on the flashlight. A flashlight according to the present invention includes a power supply part, a lamp for generating a light by means of the power from the power supply part, and a manual switch connected between the lamp and the power supply part for switching the flashlight, characterized by further including a radio switch in addition to or instead of the manual switch, wherein the radio switch consists of a radio receiver for receiving an external radio signal to operate the radio switch.

Abstract: A method for preparing glycidol using glycerol includes mixing glycerol with urea in the presence of at least one zinc-based catalyst selected from the group consisting of Zn(NO3)2, ZnCl2, ZnO and Zn(OAc)2 under a pressure of 0.5-10 kPa at a temperature of 100-170° C. to obtain glycerol carbonate; filtering the glycerol carbonate mixed with the zinc-based catalyst through an adsorbent including a polymer resin coordinated with amine groups to separate the zinc-based catalyst and glycerol carbonate from each other; and carrying out reaction of the glycerol carbonate separated from the zinc-based catalyst in the presence of an anion alkali metal salt catalyst that is Na, K, Rb, Cs or a mixture thereof containing at least one anion selected from the group consisting of Cl?, Br?, I?, NO3?, NO2? and acetate under a pressure of 0.13-6.67 kPa at a temperature of 140-250° C. to obtain glycidol.

Abstract: Disclosed are a gas to liquids (GTL)—floating production, storage and offloading (FPSO) system that can be used in offshore oil-gas fields or stranded gas fields and a method for producing synthetic fuel using the same. More particularly, the disclosure relates to a GTL-FPSO system capable of producing liquid synthetic fuel from gas extracted from stranded gas fields or associated gas extracted from oil-gas fields, including a reforming reactor and a liquid hydrocarbon producer, and a method for producing the same.

Abstract: A method for preparing glycidol using glycerol includes mixing glycerol with urea in the presence of at least one zinc-based catalyst selected from the group consisting of Zn(NO3)2, ZnCl2, ZnO and Zn(OAc)2 under a pressure of 0.5-10 kPa at a temperature of 100-170° C. to obtain glycerol carbonate; filtering the glycerol carbonate mixed with the zinc-based catalyst through an adsorbent including a polymer resin coordinated with amine groups to separate the zinc-based catalyst and glycerol carbonate from each other; and carrying out reaction of the glycerol carbonate separated from the zinc-based catalyst in the presence of an anion alkali metal salt catalyst that is Na, K, Rb, Cs or a mixture thereof containing at least one anion selected from the group consisting of Cl?, Br?, I?, NO3?, NO2? and acetate under a pressure of 0.13-6.67 kPa at a temperature of 140-250° C. to obtain glycidol.

Abstract: Disclosed are a gas to liquids (GTL)—floating production, storage and offloading (FPSO) system that can be used in offshore oil-gas fields or stranded gas fields and a method for producing synthetic fuel using the same. More particularly, the disclosure relates to a GTL-FPSO system capable of producing liquid synthetic fuel from gas extracted from stranded gas fields or associated gas extracted from oil-gas fields, including a reforming reactor and a liquid hydrocarbon producer, and a method for producing the same.

Abstract: Disclosed are a gas to liquids (GTL)-floating production, storage and offloading (FPSO) system that can be used in offshore oil fields or stranded gas fields and a method for producing synthetic fuel using the same. More particularly, the disclosure relates to a GTL-FPSO system capable of producing liquid synthetic fuel from gas extracted from stranded gas fields or associated gas extracted from oil fields, including a reforming reactor and a liquid hydrocarbon producer, and a method for producing the same.

Abstract: The present invention relates to a portable flashlight, and more particularly to a portable flashlight which has a wireless switching function for turning on or off the flashlight by means of a radio signal in addition to a manual switch provided on the outside of the flashlight. The flashlight can not only be turned on or off by means of an external radio signal, but also be used in various ways such as turning on a part of the lamp or intermittently turning on the flashlight. A flashlight according to the present invention includes a power supply part, a lamp for generating a light by means of the power from the power to supply part, and a manual switch connected between the lamp and the power supply part for switching the flashlight, characterized by further including a radio switch in addition to or instead of the manual switch, wherein the radio switch consists of a radio receiver for receiving an external radio signal to operate the radio switch.

Abstract: Disclosed is a method for producing glycidol by successive catalytic reactions. The method includes a series of reactions for the preparation of glycerol carbonate from glycerol and the decarboxylation of the glycerol carbonate. Specifically, the method includes i) reacting glycerol with a dialkyl carbonate to prepare glycerol carbonate, and ii) subjecting the glycerol carbonate to decarboxylation wherein a base is added as a catalyst in step i) and is allowed to react with an acid to form a metal salt after step i), and the salt is used as a catalyst in step ii). According to the method, inexpensive and easy-to-purchase acid and base catalysts can be used to produce glycidol from glycerol, a by-product of biodiesel production, as a starting material in high yield with high selectivity in a convenient, simple, and environmentally friendly way. In addition, the method eliminates the need to separate the base catalyst.

Abstract: Disclosed are a gas to liquids (GTL)-floating production, storage and offloading (FPSO) system that can be used in offshore oil fields or stranded gas fields and a method for producing synthetic fuel using the same. More particularly, the disclosure relates to a GTL-FPSO system capable of producing liquid synthetic fuel from gas extracted from stranded gas fields or associated gas extracted from oil fields, including a reforming reactor and a liquid hydrocarbon producer, and a method for producing the same.

Abstract: Disclosed is a method for producing glycidol by successive catalytic reactions. The method includes a series of reactions for the preparation of glycerol carbonate from glycerol and the decarboxylation of the glycerol carbonate. Specifically, the method includes i) reacting glycerol with a dialkyl carbonate to prepare glycerol carbonate, and ii) subjecting the glycerol carbonate to decarboxylation wherein a base is added as a catalyst in step i) and is allowed to react with an acid to form a metal salt after step i), and the salt is used as a catalyst in step ii). According to the method, inexpensive and easy-to-purchase acid and base catalysts can be used to produce glycidol from glycerol, a by-product of biodiesel production, as a starting material in high yield with high selectivity in a convenient, simple, and environmentally friendly way. In addition, the method eliminates the need to separate the base catalyst.

Abstract: Disclosed is a method for producing glycidol by decarboxylation of glycerol carbonate. In the method, an ionic liquid catalyst is added for the reaction. According to the method glycidol can be produced in high yield and selectivity. The method enables the production of glycidol in an easy, simple and environmentally friendly way.

Abstract: Disclosed is an sorbent for removing sulfur dioxide (SO2) contained in combustion flue gases or in the atmosphere by using a diamine-based ionic liquid or a diamine compound supported by a polymer resin. To be specific, the present invention relates to a method of using a tertiary diamine compound immobilized on a polymer surface as a SO2 sorbent and also relates to a novel sorbent for absorbing or adsorbing a sulfur dioxide hydrate (SO2.H2O) formed by a bond between SO2 and water.

Abstract: Disclosed is an sorbent for removing sulfur dioxide (SO2) contained in combustion flue gases or in the atmosphere by using a diamine-based ionic liquid or a diamine compound supported by a polymer resin. To be specific, the present invention relates to a method of using a tertiary diamine compound immobilized on a polymer surface as a SO2 sorbent and also relates to a novel sorbent for absorbing or adsorbing a sulfur dioxide hydrate (SO2.H2O) formed by a bond between SO2 and water.

Abstract: Disclosed is a method for producing glycidol by decarboxylation of glycerol carbonate. In the method, an ionic liquid catalyst is added for the reaction. According to the method glycidol can be produced in high yield and selectivity. The method enables the production of glycidol in an easy, simple and environmentally friendly way.