Abstract: Provided is a method for synthesizing bipyridine that includes performing a dimerization reaction of a reactant including a piperidine-based compound, a pyridine-based compound, or a mixture thereof in the presence of a catalyst in which an active metal is supported on a composite metal oxide support including silica (SiO2) and alumina (Al2O3).

Abstract: An operating method is disclosed for a dehydrogenation reaction system. The method includes providing a system having: an acid aqueous solution tank including an acid aqueous solution; a dehydrogenation reactor including a chemical hydride of a solid state and receiving an acid aqueous solution from the acid aqueous solution tank to react the chemical hydride with the acid aqueous solution to generate hydrogen; and a fuel cell stack receiving hydrogen generated from the dehydrogenation reactor to be reacted with oxygen to generate water and simultaneously to generate electrical energy. The method also includes recycling the water generated from the fuel cell stack to one or all of the acid aqueous solution tank, the dehydrogenation reactor, and a separate water tank. The acid is formic acid and, in in the dehydrogenation reactor, the temperature is in a range of 10° C. to 400° C. and the pressure is in a range of 1 bar to 100 bar.

Abstract: A dehydrogenation reaction apparatus includes: an aqueous add solution tank that stores an aqueous acid solution; a dehydrogenation reactor that stores a chemical hydride and selectively receives the aqueous acid solution stored in the aqueous add solution tank; and a heat control device. The heat control device is disposed inside or outside the dehydrogenation reactor and controls an internal temperature of the dehydrogenation reactor.

Abstract: A dehydrogenation reaction device is disclosed. The device includes a chemical hydride storage unit including a chemical hydride storage tank, a reaction unit including an acid aqueous solution storage tank, and a dehydrogenation reactor for generating hydrogen by reacting a chemical hydride with an acid aqueous solution. The device further includes a hydrogen storage unit including a hydrogen storage tank for storing the hydrogen produced in the dehydrogenation reactor, and a recovery unit for recovering the product produced in the dehydrogenation reactor.

Abstract: A catalyst for preparing a synthesis gas includes: a mesoporous Al2O3 support including mesopores having a pore size of about 1 nm to about 30 nm; metal nanoparticles supported in the mesopores of the mesoporous Al2O3 support wherein the metal nanoparticles have a particle size of less than or equal to about 20 nm; and a metal oxide coating layer including particles wherein the metal oxide coating layer is coated on the surface of the mesoporous Al2O3 support and includes mesopores having a pore size of about 2 nm to about 50 nm.

Abstract: Disclosed is a method for preparing a synthesis gas. The method may include performing a combined reforming reaction by injecting a reaction gas including water (H2O) and heat-treating it in the presence of the catalyst. The catalyst may include a mesoporous support including regularly distributed mesopores, metal nanoparticles supported on the support, and a metal oxide coating layer coated on a surface of the support.

Abstract: The present disclosure provides a method of preparing a catalyst for synthesizing dimethyl ether or methylacetate from synthetic gas that includes preparing a nanosheet ferrierite zeolite (FER), and co-precipitating the nanosheet ferrierite zeolite and a precursor of a Cu—Zn—Al-based oxide (CZA) to obtain a hybrid CZA/FER catalyst.

Abstract: A dehydrogenation reaction apparatus includes a dehydrogenation reactor having a reaction vessel that stores a chemical hydride; and a methane generator that converts carbon monoxide generated in the dehydrogenation reactor into methane.

Abstract: A dehydrogenation method is provided that includes subjecting a first hydrogen storage body including compound including two or more N-heterocycloalkyl groups, and second hydrogen storage body including a compound including a substituted or unsubstituted cycloalkyl group and an N-heterocycloalkyl group, to a dehydrogenation reaction in the presence of a catalyst to produce hydrogen.

Abstract: A hydrogen generating method includes generating hydrogen by dehydrogenation-reacting a chemical hydride of a solid state with an acid aqueous solution. The dehydrogenation-reaction is performed by reacting 1 mol of hydrogen atoms of the chemical hydride with an acid and water at a molar ratio of 0.5 to 2.

Abstract: The present disclosure provides a method of preparing a catalyst for synthesizing dimethyl ether or methylacetate from synthetic gas that includes preparing a nanosheet ferrierite zeolite (FER), and co-precipitating the nanosheet ferrierite zeolite and a precursor of a Cu—Zn—Al-based oxide (CZA) to obtain a hybrid CZA/FER catalyst.

Abstract: A dehydrogenation reaction apparatus and a system including the same are disclosed. The dehydrogenation reaction apparatus includes: a main housing; and a dehydrogenation reactor which is provided inside of the main housing and has a catalyst provided inside. In particular, the dehydrogenation reactor generates hydrogen from a liquid organic hydrogen carrier (LOHC). The dehydrogenation reaction apparatus further includes: a heating device provided inside of the main housing and configured to apply heat to the dehydrogenation reactor through a phase change material, where the phase change material is provided between the main housing, and the dehydrogenation reactor and the heating device.

Abstract: Provided is a method for synthesizing bipyridine that includes performing a dimerization reaction of a reactant including a piperidine-based compound, a pyridine-based compound, or a mixture thereof in the presence of a catalyst in which an active metal is supported on a composite metal oxide support including silica (SiO2) and alumina (AI2O3).

Abstract: Disclosed are a low-carbon polyurethane foam composition and a method for preparing the same. The low-carbon polyurethane foam composition may have improved foam cell uniformity while contributing to carbon reduction goals as a result of applying a polyether carbonate polyol containing a carbonate bond. The method for preparing the low-carbon polyurethane foam composition may include reacting a polyol mixture including a carbonate bond-containing polyether carbonate polyol and a petroleum-based polyether polyol, an isocyanate, and a silicone surfactant.

Abstract: A low-temperature dehydrogenation method includes a dehydrogenation reaction of a reactant including a piperidine-based compound substituted with one or more alkyl groups. The dehydrogenation reaction takes place in the presence of a catalyst including an active metal. The active metal includes platinum (Pt), palladium (Pd), or a mixture thereof that is supported on a carrier including a composite metal oxide having alumina (Al2O3) and an additional metal oxide different from alumina, at a low temperature of 150° C. to 250° C., to produce hydrogen.

Abstract: Disclosed are a catalyst used for converting carbon dioxide to methanol by hydrogenation and a method preparing the sane. The caratlys may include: a mesoporous indium oxide; and a catalyst supported on the mesoporous indium oxide. Preferably, a porous structure of the mesoporous indium oxide may have Ia3d symmetry and may include mesopores and micropores interconnecting the mesopores.

Abstract: A catalyst for a dehydrogenation reaction includes a carrier including Al2O3 having a theta (?) phase, an active metal supported on the carrier and including a noble metal, and an auxiliary metal supported on the carrier and different from the active metal.

Abstract: Disclosed are a composite cellulose nanosheet with excellent transparency and strength and manufacturing method thereof. The manufacturing method of a composite cellulose nanosheet includes: preparing a dispersion including a cellulose nanofiber and a cellulose nanocrystal; preparing a nanosheet support with the dispersion; contacting the nanosheet support with a crosslinking agent; and placing the nanosheet support that has contacted the crosslinking agent between two sheets of barrier materials such as two sheets of glass plate.

Abstract: Disclosed are a catalyst for preparing a synthetic gas through dry reforming, a method preparing the catalyst, and a method using the catalyst for preparing the synthetic gas. The catalyst may include: a support including regularly distributed mesopores; metal nanoparticles supported on the support; and a metal oxide coating layer coated on a surface of the support.

Abstract: A dehydrogenation reaction apparatus is disclosed. An embodiment of the present disclosure provides a dehydrogenation reaction apparatus, including: a dehydrogenation reactor that includes a reaction vessel configured to store a chemical hydride, and at least one partition wall partitioning an inner space of the reaction vessel into a plurality of reaction chambers; and a buffer tank configured to temporarily store hydrogen generated in the dehydrogenation reactor and then supply the hydrogen to the fuel cell.