Abstract: The present disclosure relates to a recombinant vector for plant expression system in which expression is increased by a radio frequency. According to the present disclosure, since the recombinant vector for plant expression of the present disclosure significantly increased the expression of the target protein in plants by treatment of an eco-friendly and biologically stable radio frequency, there is an effect of overcoming a low protein expression problem of a method using plant cells while having an advantageous effect capable of replacing a conventional production method using animal cells or microorganisms.

Abstract: Disclosed herein is an experiment apparatus for estimating ground deformation during gas hydrate recovery. The experiment apparatus may include: a high-pressure cell having a space in which a sample containing gas hydrate is stored; a recovery member inserted into the sample so as to recover the gas hydrate contained in the sample to the outside; and a transparent region formed at one or more parts facing the space of the high-pressure cell, such that the sample stored in the space is observed from outside.

Abstract: Disclosed herein is an experiment apparatus for estimating ground deformation during gas hydrate recovery. The experiment apparatus may include: a high-pressure cell having a space in which a sample containing gas hydrate is stored; a recovery member inserted into the sample so as to recover the gas hydrate contained in the sample to the outside; and a transparent region formed at one or more parts facing the space of the high-pressure cell, such that the sample stored in the space is observed from outside.

Abstract: The present invention relates to a catalyst used for producing dimethylether, a method of producing the same, and a method of producing dimethylether using the same. More particularly, the present invention relates to a catalyst used for producing dimethylether comprising a methanol synthesis catalyst produced by adding one or more promoters to a main catalyst comprised of a Cu—Zn—Al metal component and a dehydration catalyst formed by mixing Aluminum Phosphate (AlPO4) with gamma alumina, a method of producing the same, and a method of producing dimethylether using the same, wherein a ratio of the main catalyst to the promoter in the methanol synthesis catalyst is in a range of 99/1 to 95/5, and a mixing ratio of the methanol synthesis catalyst to the dehydration catalyst is in a range of 60/40 to 70/30.

Abstract: Disclosed herein is a gas separation membrane for a DEM production process, including: a porous support having a carbon dioxide permeability of more than 300 GPU (GPU=1×10?6 cm3/cm2·sec·cmHg) and an inner diameter of 100˜1000 ?m; and a composite membrane provided on an inner or outer surface of the porous support and coated with a separating material having a permeation selectivity of carbon dioxide/hydrogen of 4 or more. The gas separation membrane is advantageous in that it can improve efficiency of the separation process by selectively separating and removing carbon dioxide from a gas mixture of carbon dioxide and hydrogen produced during a process of producing DME which is a next-generation clean fuel.

Abstract: The present invention relates to a catalyst used for producing dimethylether, a method of producing the same, and a method of producing dimethylether using the same. More particularly, the present invention relates to a catalyst used for producing dimethylether comprising a methanol synthesis catalyst produced by adding one or more promoters to a main catalyst comprised of a Cu—Zn—Al metal component and a dehydration catalyst formed by mixing Aluminum Phosphate (AlPO4) with gamma alumina, a method of producing the same, and a method of producing dimethylether using the same, wherein a ratio of the main catalyst to the promoter in the methanol synthesis catalyst is in a range of 99/1 to 95/5, and a mixing ratio of the methanol synthesis catalyst to the dehydration catalyst is in a range of 60/40 to 70/30.

Abstract: Disclosed is a plate type steam reformer comprising a plate type burner capable of heating a broad area of a reactor as a heat source, positioned on a bottom of the reformer; a reforming reactor requiring a relatively high temperature, positioned over the burner; a high temperature water gas shift reactor requiring a relatively moderate temperature, positioned over the reforming reactor; a low temperature water gas shift reactor requiring a relatively low temperature, positioned over the high temperature water gas shift reactor; and dividing plates positioned between the above three reactors and between the reforming reactor and the burner such that combustion exhaust gas produced in the burner supplies heat to the above reactors.

Abstract: The compact steam reformer of the present invention integrally comprises a housing; a reforming reactor having an upper mixing compartment for mixing natural gas and steam and a lower compartment for accommodating a catalyst bed; a natural gas feeding coiled pipe through which natural gas is introduced while being heated; a steam generating coiled pipe in which pure water is converted to steam by the exhaust; a metal fiber burner for heating the reforming reactor; a high-temperature converter for primarily removing carbon monoxide from a synthetic gas; a low-temperature converter for secondarily reducing the carbon monoxide level of the synthetic gas; and a heat exchanger, provided between the high-temperature converter and the low-temperature converter, for cooling the gas effluent from the high-temperature converter.

Abstract: Disclosed herein is a process for the preparation of dimethylether from hydrocarbons, including tri-reforming a feedstock mixture comprised of hydrocarbons, carbon dioxide and water vapor in the presence of a tri-reforming catalyst, to prepare a syngas, which then undergoes gas-phase direct synthesis into dimethylether in one step in the presence of a hybrid catalyst. According to the process of this invention, three main processes among typical syngas preparation processes are simultaneously performed, and then, the syngas thus obtained is prepared into dimethylether through a direct reaction in one step, thereby decreasing the apparatus cost and operation cost. In addition, all of the carbon dioxide separated and recovered from the unreacted material and by-products may be reused as reaction material, thus decreasing the generation of carbon dioxide and reducing the material cost.

Abstract: A modified ⊖-Al2O3-supported nickel reforming catalyst and its use for producing synthesis gas from natural gas, more specifically to a nickel reforming catalyst expressed by the following formula 1, having improved coke resistance, high-temperature catalysis stability and catalytic activity, which is prepared by coating nickel or mixture of nickel and cocatalyst (M1-M2-Ni) on a Al2O3 support modified with metal (M3-M4-ZrO2/⊖-Al2O3), and its use for producing synthesis gas from natural gas through steam reforming, oxygen reforming or steam-oxygen reforming, M1-M2-Ni/M3-M4-ZrO2/⊖-Al2O3  (1) wherein M1 is an alkali metal; each of M2 and M3 is an alkaline earth metal; and M4 is a IIIB element or a lanthanide.

Abstract: The present invention relates to a modified &thgr;-Al2O3-supported nickel reforming catalyst and its use for producing synthesis gas from natural gas, more specifically to a nickel reforming catalyst expressed by the following formula 1, having improved coke resistance, high-temperature catalysis stability and catalytic activity, which is prepared by coating nickel or mixture of nickel and cocatalyst (M1-M2-Ni) on a &thgr;-Al2O3 support modified with metal (M3-M4-ZrO2/&thgr;-Al2O3), and its use for producing synthesis gas from natural gas through steam reforming, oxygen reforming, or steam-oxygen reforming,

Abstract: A modified &thgr;-Al2O3-supported nickel reforming catalyst and its use for producing synthesis gas from natural gas, more specifically to a nickel reforming catalyst expressed by the following formula 1, having improved coke resistance, high-temperature catalysis stability and catalytic activity, which is prepared by coating nickel or mixture of nickel and cocatalyst (M1—M2—Ni) on a &thgr;-Al2O3 support modified with metal (M3—M4—ZrO2/&thgr;-Al2O3), and its use for producing synthesis gas from natural gas through steam reforming, oxygen reforming or steam-oxygen reforming, M1—M2—Ni/M3—M4—ZrO2/&thgr;-Al2O3  (1) wherein M1 is an alkali metal, each of M2 and M3 is an alkaline earth metal; and M4 is a IIIB element or a lanthanide.

Abstract: Disclosed is a plate type steam reformer comprising a plate type burner capable of heating a broad area of a reactor as a heat source, positioned on a bottom of the reformer; a reforming reactor requiring a relatively high temperature, positioned over the burner; a high temperature water gas shift reactor requiring a relatively moderate temperature, positioned over the reforming reactor; a low temperature water gas shift reactor requiring a relatively low temperature, positioned over the high temperature water gas shift reactor; and dividing plates positioned between the above three reactors and between the reforming reactor and the burner such that combustion exhaust gas produced in the burner supplies heat to the above reactors.

Abstract: The present invention relates to a modified &thgr;-Al2O3-supported nickel reforming catalyst and its use for producing synthesis gas from natural gas, more specifically to a nickel reforming catalyst expressed by the following formula 1, having improved coke resistance, high-temperature catalysis stability and catalytic activity, which is prepared by coating nickel or mixture of nickel and cocatalyst (M1—M2—Ni) on a &thgr;m-Al2O3 support modified with metal (M3—M4—ZrO2/&thgr;-Al2O3), and its use for producing synthesis gas from natural gas through steam reforming, oxygen reforming or steam-oxygen reforming,

Abstract: Disclosed is a compact steam reformer which integrally comprises a housing; a reforming reactor having an upper mixing compartment for mixing natural gas and steam and a lower compartment for accommodating a catalyst bed; a natural gas feeding coiled pipe through which natural gas is introduced while being heated; a steam generating coiled pipe in which pure water is converted to steam by the exhaust; a metal fiber burner for heating the reforming reactor; a high-temperature converter for primarily removing carbon monoxide from a synthetic gas; a low-temperature converter for secondarily reducing the carbon monoxide level of the synthetic gas; and a heat exchanger, provided between the high-temperature converter and the low-temperature converter, for cooling the gas effluent from the high-temperature converter. The steam reformer enjoys the advantage of being easy to install in situ and being fabricated at low cost.