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Preparation and Absorption Properties of ZnO Nanostructures for Cleanup of H2S Contained Gas
박노국,한기보,윤석훈,류시옥,이태진 한국정밀공학회 2010 International Journal of Precision Engineering and Vol. No.
A nano-size zinc oxide sorbents was formulated for the effective removal of sulfur compounds (H2S) at a very low concentration (under 50 ppmv) in a gasified fuel gas. They were prepared by a matrix-assisted method in this study. An active carbon was used as a matrix and zinc acetate (Zn(C2H3O2)2 2H2O) was selected as a precursor. About 10-40 wt% of zinc was doped over the activated carbon in the preparation of the sorbents. Content of the zinc doped over the activated carbon had an influence on the morphology of zinc oxide nanostructure. The reactivity tests of the ZnO nanostructures having various morphologies were performed in a fixed bed reactor. Their reactivity increased as their sizes became smaller and their surface areas made larger. Most prepared nanosize zinc oxides showed an excellent performance for the removal of H2S at a very low concentration.
Kano 품질특성 및 Timko 고객만족 계수를 이용한 신제품 개발 프로세스 제안
박노국,이상복,Park, Roh-Gook,Ree, Sang-Bok 대한안전경영과학회 2009 대한안전경영과학회지 Vol.11 No.4
In this paper, we propose development of new products including the proposed process of at the customer's requirements. The success of new product development depends on customer satisfaction in the marketplace. Existing product development process, including the customer's interest was weak. In this paper, we propose development of new products which include Kano's attractive quality factor method and Timko's customer satisfaction index method. Also we verified new medical treatment of incontinence-nency which is applied to the proposed process.
박노국,장석주,김홍재 대한안전경영과학회 2008 대한안전경영과학회 학술대회논문집 Vol.2008 No.11
Ten years have passed since the establishment of KOSHBA(Korea Small and medium enterprises Hybrid Business Association). KOSHBA is composed of over 400 regional groups; over 6,000 enterprises are participating in the association. To become a dynamic and vital association, it is necessary to share, learn, and discuss their managerial problems based on mutual trust and respect at the regular monthly meeting.
Preparation of Micro-Channel Catalytic Reactor Coated with Macro-Porous Al2O3 for Fuel Reformer
박노국,이태진 한국정밀공학회 2014 International Journal of Precision Engineering and Vol. No.
Macroporous ordered alumina was synthesized in a micro-channel reactor, using polystyrene colloidal spherical nano-beads as atemplate for the formation of the macro pores. A 0.1 M aluminum nitrate solution, used as the precursor for the synthesis of alumina,was mixed with a polystyrene colloidal solution at a volumetric ratio of 1:1. In this study, SUS-316, stainless steel material was usedas a micro-channel plate and the buffer layer was homogeneously coated over the micro-channel plate. Scanning electron microscopyconfirmed the synthesis of high quality ordered macro porous alumina over the micro channels through the application of a bufferlayer. To use the ordered macro porous alumina as a catalytic support, the precursor of the active components, Ni, was added to amixed solution of the aluminum precursor and polystyrene colloid. A channel type heat exchange reactor was used as a fuel reformerfor SOFC in this study. The macro-porous Ni-Al2O3 based catalyst coated over the micro-channel plate was inserted into the outsidechannel. It could be confirmed through this study that the efficiency of heat exchange was enhanced through the use of the microchannelplate, and the metal foam and the catalytic activity of nickel based catalyst for reforming of dodecane was improved throughthe use of the macro-porous alumina support.
박노국,성연백,김민정,김용술,이태진 한국정밀공학회 2015 International Journal of Precision Engineering and Vol. No.
Meso- and macro-porous aluminosilicate was synthesized using a templating method. Aluminosilicate, which consists of alumina and silica, is a zeolite ceramic that exhibits high porosity and high specific surface area. These properties make aluminosilicates good catalytic support materials. Despite this, the applications of aluminosilicates have been limited to the catalytic conversion of light gases because of the small pore size, < 2 nm. Therefore, meso- and macro-porous zeolite was synthesized for use in the catalytic process for the large size molecules and water vapor. In this study, a range of surfactants were used to produce meso-pores, 2-5 nm in size. Polymer nano-beads were also used as a template for the formation of macro-pores in aluminosilicate. The meso- and macroporous aluminosilicate was coated over a micro-channel plate, and the coated micro-channel plates were stacked for use as a catalytic micro-channel reactor. The meso- and macro-porous aluminosilicate over the micro-channel plate was supported with copper and zinc oxide using the impregnation method for the production of hydrogen via the water-gas shift reaction.