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폐목재를 이용한 KOH, NaOH, ZnCl<sub>2</sub> 화학적 활성화로 생성된 바이오차의 흡착특성에 관한 연구
원민희,조우리,장진만,이재영,MinHee Won,WooRi Cho,Jin Man Chang,Jai-young Lee 한국청정기술학회 2023 청정기술 Vol.29 No.4
흡착을 이용한 오염물질 정화 방법에 많은 관심이 집중되고 있으며, 최근에는 바이오차를 이용하여 유기 및 무기오염물질 제거에도 이용할 수 있다는 연구가 진행되고 있다. 특히 폐자원 바이오매스로 폐목재는 바이오매스 재활용 방안이 필요한 상황으로 폐목재를 이용하여 생성된 바이오차를 흡착용량을 증가하기 위한 방법이 필요하다. 저온고압을 이용하여 에너지 소비가 낮고 수분 제거 전처리가 필요없는 열수가압탄화(Hydrothermal Carbonization, HTC)를 이용하여 탄화하여 바이오차를 생성하고, KOH, NaOH, ZnCl<sub>2</sub> 약품을 이용한 화학적 활성화법으로 생성된 바이오차를 약품별 활성화에 따른 요오드 흡착능, 비표면적, 세공크기, 세공부피, 세공분포 및 SEM을 분석하여 흡착특성을 파악하였다. HTC 300℃, 4 hr에서 생성된 바이오차를 KOH, NaOH, ZnCl<sub>2</sub> 약품별로 활성화로 생성된 바이오차 중 요오드흡착능이 높은 바이오차를 선정하여 비표면적, 세공부피, 세공크기 및 세공분포를 분석한 결과, 비표면적은 774~1.387 m<sup>2</sup>/g으로 활성탄과 같은 높은 비표면적을 나타냈으며, 평균세공크기 21~24 Å 범위의 미세공이 형성되었음을 확인하였다. 또한 SEM 관찰한 결과 활성화에 따라 표면이 일정한 형태의 균일한 세공이 발달되고 세공의 수가 증가하는 것을 확인할 수 있었다. There is a lot of interest in methods for pollutants using adsorption, and recent research is being conducted to show that biochar can be used to remove organic and inorganic pollutants. In particular, wood waste as waste biomass requires a biomass recycling method, and a method to increase the adsorption capacity of biochar produced using wood waste is needed. Biochar is created by Hydrothermal carbonization (HTC) using, which uses low temperature and high pressure, has low energy consumption and does not require moisture removal pretreatment, and biochar is created through chemical activation using KOH, NaOH, and ZnCl<sub>2</sub> chemicals. The adsorption characteristics of biochar were determined by analyzing iodine adsorptivity, specific surface area, pore diameter, pore volume, pore distribution, and SEM according to the activation. The results of analyzing the selecting biochar by activating the biochar produced at HTC 300℃, 4 hr by KOH, NaOH, and ZnCl<sub>2</sub> chemicals, the specific surface area was 774~1.387 m<sup>2</sup>/g, showing a high specific surface area similar to activated carbon, and it was confirmed that micropores with an average pore diameter in the range of 21~24 Å were formed. As a result of SEM observation, the surface was uniform with a certain shape depending on activation. It was confirmed that one pore was developed and the number of pores increased.
하라켄야 ‘백(白)’개념을 중심으로 본 스페이스브랜딩 공간 디자인 특성 연구
원민희,김개천 한국실내디자인학회 2017 한국실내디자인학회논문집 Vol.26 No.6
Recently, space branding has been used as a branding method for many companies because space communication is a way of utilizing space in a wide range of ways. However, generally speaking, communication only focuses on goods and information about brands and does not focus on consumer’s stories. The purpose of this study is to present the communication of " Back to Harakenya " in concept of Harakeya as a solution to this problem and confirm its effectiveness through examples. We selected on the range of " cosmetics brand ", " food and beverage brand ", " brand brand " and " fashion brand " which can used as a direct experience as a marketing method, which is a good condition for communication. Based on that, Harakenya selected cases as spaces with the concept of “Back to Harakenya”. Previously, Harakenya’s concept of “Back to Harakenya” and his designs appears three features. First, it transforms into various being secondly, it generates active imagination and it contains at least as many things as possible. This resulted in the effect that people remember the image with a clear image. Based on this study, We investigated to draw a result of effects through how the design expression is made in the spaces of Space Branding and how the “Back to Harakenya” communication is taking place in the space. Through these studies, the design and communication method of Harakenya’s “Back to Harakenya” concept helps us to remember the brand clearly and furthermore, we confirmed that the brand value can be improved. 본 연구는 최근 다양해진 브랜드 표현방법 중 공간을 활용한 스페이스 브랜딩이 사용자와 커뮤니케이션을 효과적으로 일으키고 있음을 확인하고 그에 따른 중요성을 말하고자 하는 것에 목적을 두었다. 본 연구의 범위는 인터브랜드에서 선정한 2017년 브랜드 가치가 높은 기업 TOP100 중 팝업스토어를 실행한 4가지 브랜드의 공간 사례로 두었으며 이에 앞서 디자이너 '하라켄야' 디자인 철학 중 '백(白)'을 중심으로 '스페이스 브랜딩'과 연관시켰을 때 커뮤니케이션을 일으키는 요소임을 확인하고, 둘의 공통적 특징 키워드 '연계의 상징성', '매개적 표현', '체험적 공성'을 도출하였다. 첫째, '연계의 상징성'은 공간 전체에서 볼 수 있고 공간에 표현된 부분들이 연계됨에 따라 하나의 브랜드를 상징한다. 둘째, '매개적 표현'은 공간 부분적인 것에 해당하며 브랜딩 과정에 있어 공간이 창조적 욕구를 일으키게 함으로 브랜드만의 고유성을 표현하게 하는 특징이다. 셋째, '체험적 공성'은 공간에 하라켄야가 말하는 간섭이 적은 디자인요소를 넣어 사용자들이 각자 다르게 체험하게 함으로 다양한 해석을 할 수 있게 한다. 이 세 가지의 특징을 팝업스토어인 공간에 분석함으로 브랜딩 과정에서 '스페이스'는 사용자와 커뮤니케이션을 일으키며 나아가 브랜드 이미지의 구축을 하고 브랜드 가치가 향상 될 수 있다는 것을 말하고자 한다. 본 연구를 통해 공간이 브랜딩에 있어 큰 역할을 하고 있음을 인지하고 브랜드의 가치를 높이는데 더 많이 활용하고 다양한 디자인으로 표현되기를 기대한다.
열수가압탄화에 의해 제조한 폐목재 바이오차 (Bio-char) 활성탄의 특성화에 관한 연구
원민희,조우리,장진만,박지수,이재영 한국폐기물자원순환학회 2022 한국폐기물자원순환학회지 Vol.39 No.3
The market for activated carbon is growing due to environmental awareness and strengthening of environmental regulations. Biochar is a solid carbide that is produced through a hydrothermal carbonization (HTC) process. Wood is an ideal raw material for activated carbon and biomass waste wood because it has low energy consumption rates and does not require pre-treatment to remove moisture. The activated carbon samples in this study were prepared by a chemical activation process using KOH, which is mainly used for activation. The study analyzed the specific surface area, pore volume, pore size, and pore distribution by selecting four samples with high iodine adsorption capacity among the prepared activated carbon samples. The specific surface area for all four samples was between 1192.2 and 1387.1 m2/g, all of which were over 1,000 m2/g, and the pore volume was between 0.6510 and 0.8030 cm3/g. During this process, micropores with an average pore size of 21 to 25 Å were formed. SEM photography revealed that these pores were uniform and that the number of pores increased according to activation levels of the carbon samples. When the iodine adsorptivity and specific surface area of commercial activated carbon was compared with that of activated carbon prepared by waste wood biochar with KOH, the specific surface area was higher in the activated carbon samples prepared by waste wood biochar with KOH. These results indicate that the adsorption of activated carbon by waste wood biochar with KOH is successful when applied to activated carbon samples.
열수가압탄화(Hydrothermal Carbonization, HTC) 반응을 이용한 폐목재 고형연료 가능성에 관한 연구
원민희 ( Minhee Won ),이재영 ( Jai-young Lee ) 한국폐기물자원순환학회 2021 한국폐기물자원순환학회지 Vol.38 No.6
As an alternative to a new and renewable energy source, bio-coal is generated through hydrothermal carbonization (HTC) which is a novel renewable energy production technology using waste. Therefore, bio-coal was generated through HTC reaction using wood waste, which is the most used biomass raw material and requires a recycling method and confirmed its possibility as a solid fuel. It can be seen that the higher the reaction temperature and the longer the reaction time, the higher is the fixed carbon content, which affects the heating value. At 300℃ and 4 h, the lowest heating value was 6841.23 Kcal/kg. In addition, the fuel ratio at 300℃ was 1.3 ~ 1.6, which indicates a higher fuel ratio range than that of low-grade coal, and it can be seen from the van krevelen diagram that the biomass region is closer to the lignite region.