첨부파일에서 보실 수 있습니다.
Review of Wood Biomass Cyclone Burnerby , Kangil Choe / Energies, mdpi, 2021AbstractDespite the technology for wood biomass combustion being much more advantageous when compared to traditional burners, such as the Stoker or fluidized burner, there has been scant research on the topic of wood biomass cyclone burners. The purpose of this paper is to review biomass cyclone burner technology, which includes theory, design, and combustion, in terms of the chemistry and properties of wood biomass, emission related to NOx and CO, and application of the burner, such as co-firing with coal and gasification firing. The design factors for type 2 cyclone burners have been identified through the following three dimensionless numbers: swirl intensity (S), Strouhal number (St), and Reynolds number (Re). The lowest CO and NOx of type 2 cyclone burners have been sought for pulverized and non-pulverized wood biomass. The benefits of the co-firing of wood biomass in a cyclone burner with coal, have been presented in respect to combustion efficiency, alkali retention, and the amount of K and Na. The results evidently reveal the reduction in clinker and slag generation, which are the biggest concern to wood biomass combustion. The recent results of gasification studies using type 2 cyclone burners are compared, in terms of producer gases and syngases (H2, CO, CO2, CH4)[View all text] https://doi.org/10.3390/en14164807
Experimental Study on Non-Pulverized Wood Biomass Combustion With a New Three-Way Swirling Combustion Cyclone Combustorby Kangil Choe, Yangho Lee, Soongul Lee, Michael Weedon / Journal of Thermal Science and Engineering Applications, ASME, 2020AbstractAn experimental study presents a new innovative cyclone combustor, known as the three-way swirling combustion (TSC), utilizing non-pulverized wood biomass. The study shows that the combustor reached near-complete combustion, as evident in the measurements of CO and NOx emissions, and the excess air ratio. It also demonstrates the unique features of the TSC combustor, which includes an air curtain insulation effect with a high ash removal rate that reduces clinker and slag formation, alongside a chamber that does not need a refractory brick. It compares against conventional combustion technology, such as the stoker and the fluidized bed in terms of the amount of emission gases, maximum temperature, and excessive air ratio. Six geometrical and operational design criteria of the TSC for wood biomass combustion are identified for future work of design optimization. Ultimately, the implementation of the TSC for non-pulverized wood biomass and possibly for other biomass holds great potential for economically and technically beneficial incineration and power generation.[View all text] https://doi.org/10.1115/1.4044351
Hydrothermal Polymerization Catalytic Process Effect of Various Organic Wastes on Reaction Time, Yield, and Temperatureby AF Mackintosh, T Shin, H Yang, K Choe / Processes, mdpi, 2020AbstractThe purpose of this study is to optimize the processing conditions (temperature, pressure, process time, yield rate) for the conversion of biomass to a high-energy density biofuel. The hydrothermal polymerization (HTP) catalytic process has been developed for production of biofuel via hydrothermal processing using an acid-based catalyst. This study has shown that the HTP catalytic process for a reference feedstock lowered the temperature by 10 to 40 °C, reduced the pressure requirement by 1 to 2 MPa, increased the rate of yield by 22%, and shortened the total processing time by up to 3 h when compared to the conventional hydrothermal carbonization (HTC) process. FTIR spectrum analysis of the HTP catalytic biofuel has shown that lignin in the biomass is preserved, while the pure HTC process destroyed the lignin in the biomass. GC/MS analysis of the process liquid determined the changes of the intermediate soluble components as a function of time. By measuring the 2,5-hydroxymethyl furfuralde concentration in solution, an endpoint determination could be made. This study also determined the approximate analysis of the HTP biofuel from various organic wastes such as cotton, cow manure, wood waste, paper waste, sugarcane bagasse waste, and food waste.[View all text] https://doi.org/10.3390/pr8030303
Experimental Study on Hydrothermal Polymerization Catalytic Process Effect of Various Biomass through a Pilot Plantby Alexis F. Mackintosh, Hyunchol Jung, In-Kook Kang, Seongyeun Yoo, Sanggyu Kim andKangil ChoeAbstractThrough the previous study a hydrothermal polymerization (HTP)—a catalytic methodology for treating various biomass and organic wastes—has been developed on a lab scale with a 1 L reactor and the results published. The research work described herein aims to ensure that the catalytic process is scalable for pilot and even commercial scale plants. A 1700 L binary reactor system has been built and the assumptions of a commercial scale plant that would have 10,000 to 20,000 L pressure vessels tested. The HTP catalytic biofuel process converts mono- and polysaccharides into a solid polymer fuel that is based on a furfuraldehyde ring system. The calorific value of the material obtained from the pilot plant is on the order of 27 MJ/kg and the material typically has low ash and fixed carbon content order of 48% which are about same as the lab results for various wood biomass feedstocks. Though a 1700 times scale up binary reactor system the scalability of the HTP catalytic methodology has been confirmed and the mass and energy balance of the binary reactor identified in order to provide fundamental data for commercial scale establishment in future.[출처] https://www.mdpi.com/2227-9717/9/5/758
Kinava's efforts to energize green waste resources are being informed through a number of Investor Relations (IR) and academic forums in Korea and North America.
그린뉴딜 키나바 프렌즈 1기 모집모집기간 2021.03.30.화 ~ 2021.04.12.월 18:00모집발표 2021.04.13.화 (개인문자 및 카카오톡으로 안내)발 대 식 2021.04.16.금 (장소 및 시간 추후 공지)활동기간 2021.04.19.월 ~ 2021.05.07.금 지원방법 첨부파일 양식 작성 후 이메일(yunplanning01@naver.com) 접수 지원대상 - 아름다운 대한민국 만들기에 관심있는 분- 폐기물 자원화에 관심있는 분- 키나바의 사람과 자연의 공존을 이해하고 많은 사람들과 커뮤니케이션이 가능한 분- 그린뉴딜에 관심있는 분모집인원 50명 (블로그/유튜브/인스타그램/틱톡 중 메인채널 1, 서브채널 1 운영 가능자)활동내용 - 키나바에서 제공한 주제 내용으로 컨텐츠(영상)제작 및 SNS업로드- 팀별로 아이디어 공유 후 팀원 개인이 운영하는 SNS에 미션 내용 업로드 활동혜택 활동비 15만원 시상내역 - 최우수상 1인 상금 30만원, 여름방학 인턴 기회 부여 (면접 별도)- 최우수 1팀 100만원, 우수 1팀 50만원, 장려 1팀 30만원 문의처 031-271-5353, 010-4305-1788 ilove7730@yunplanning.com (담당자: 박긍준 실장)