청정기술 (Clean Technology)

  • 제28권3호
  • /
  • Pages.232-237
  • /
  • 2022
  • /
  • 1598-9712(pISSN)
  • /
  • 2288-0690(eISSN)
한국청정기술학회 (The Korean Society of Clean Technology)
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루테늄 담지 활성탄-마그네시아 혼합 촉매 상에서 알긴산의 저분자화 연구

Ru-based Activated Carbon-MgO Mixed Catalyst for Depolymerization of Alginic Acid

  • 양승도 (서울대학교 화학생물공학부) ;
  • 김형주 (서울대학교 화학생물공학부) ;
  • 박재현 (서울대학교 화학생물공학부) ;
  • 김도희 (서울대학교 화학생물공학부)
  • Yang, Seungdo (School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University) ;
  • Kim, Hyungjoo (School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University) ;
  • Park, Jae Hyun (School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University) ;
  • Kim, Do Heui (School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University)
  • 투고 : 2022.04.25
  • 심사 : 2022.06.20
  • 발행 : 2022.09.30
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초록

해조류 바이오매스 중 갈조류의 주요 구성 성분인 알긴산은 다양한 산업에서 널리 사용되어지며, 촉매적 저분자화를 통해 당, 당알코올, 퓨란계, 그리고 유기산과 같은 고부가가치 화합물로 전환할 수 있다. 본 연구에서는 루테늄 담지 활성탄과 마그네시아를 혼합하여 알긴산 저분자화 반응에 적용하고자 하였다. 이러한 불균일계 촉매 시스템은 생성물에 대한 분리가 용이하고 정제 과정의 간소화가 장점으로 작용한다. 반응 결과, 탄소 수 5개 이하의 저분자량 알코올 및 유기산이 생성되었으며, 최적의 반응 조건 탐색을 통해 최종적으로 1 wt% 알긴산 수용액 30 mL, 루테늄 담지 활성탄 100 mg, 마그네시아 100 mg, 반응 온도 210 ℃, 반응 시간 1 h의 반응 조건에서 29.8%의 알코올에 대한 탄소 수율과 43.8%의 알코올 포함 액상 생성물에 대한 총 탄소 수율을 확보하였다.

Biorefineries, in which renewable resources are utilized, are an eco-friendly alternative based on biomass feedstocks. Alginic acid, a major component of brown algae, which is a type of marine biomass, is widely used in various industries and can be converted into value-added chemicals such as sugars, sugar alcohols, furans, and organic acids via catalytic hydrothermal decomposition under certain conditions. In this study, ruthenium-supported activated carbon and magnesium oxide were mixed and applied to the depolymerization of alginic acid in a batch reactor. The addition of magnesium oxide as a basic promoter had a strong influence on product distribution. In this heterogeneous catalytic system, the separation and purification processes are also simplified. After the reaction, low molecular weight alcohols and organic acids with 5 or fewer carbons were produced. Specifically, under the optimal reaction conditions of 30 mL of 1 wt% alginic acid aqueous solution, 100 mg of ruthenium-supported activated carbon, 100 mg of magnesium oxide, 210 ℃ of reaction temperature, and 1 h of reaction time, total carbon yields of 29.8% for alcohols and 43.8% for a liquid product were obtained. Hence, it is suggested that this catalytic system results in the enhanced hydrogenolysis of alginic acid to value-added chemicals.

키워드

과제정보

본 논문은 한국연구재단(NRF)과 한국과학기술연구원(KIST)을 통한 기초과학연구사업의 연구비(NRF-2020M1A2A2080429)의 지원을 받은 연구임. 본 논문은 서울대학교 공학연구원의 지원을 받은 연구임.

참고문헌

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