研究成果:金屬奈米孔洞碳材之合成及應用於高效5-羥甲基糠醛(HMF)到2,5-呋喃二甲酸 (FDCA)綠色轉化製程之開發

5 3 月

金屬奈米孔洞碳材之合成及應用於高效5-羥甲基糠醛(HMF)到2,5-呋喃二甲酸 (FDCA)綠色轉化製程之開發
Synthesis of Metal-loaded Nanoporous Carbon for Efficient Transfer Oxidation of 5-Hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA) in a Green Process

 

Valorizatioin of lignocellulosic biomass waste has considerably drawn scientific attentions for researchers while fossil fuel reservoir continues to dwindle and global need of emergent renewable energy hikes. With this bilateral fund, both NTU and AS research teams could have the opportunity to initiate the collaboration based on mutual interests with our characteristic strengths, respectively. In the past two fiscal years starting from 2017, we have focused on rational development of catalytic system, which could effectively transform the chemical components of lignocellulosic biomass to fine chemicals. Emphasis has been placed on upgrading hydroxymethylfurfural (HMF) to pyran-like derivatives and research topics includes selective conversion of monosaccharide to HMF, furandicarboxylic acid (FDCA) production derived from efficient oxidation over Rh@AC, dimethylfuran (DMF) production derived from hydrogenation over Ru@porous carbon as well as understanding the dynamics of efficient hydrolytic depolymerization of cellulose. The aforementioned topics mainly comprehend the utilization of lignocellulosic biomass waste and our efforts have also been rewarded in prestigious publication including ACS Sustainable Chemistry & Engineering, Sustainable Energy Fuels as well as two upcoming manuscripts. Very recently, Wu lab from NTU extended to lignin component of lignocellulosic biomass and successfully proposed liquid-phase reduction process of lignin depolymerization over commercial Rh/C catalyst assisted formic acid, showing an efficient liquefaction for upgrading lignin. Eco-friendly process with ethanol-water co-solvent (3/1, v/v) was employed to provide the best compatibility for lignin liquefaction. The bio-oil production reached to 89.3 wt% after optimization and the total yield of monomeric component was as high as 2.89 wt%, in which alkyl guaiacols accounts for the main proportion. On the other hand, Chung lab from AS has developed carbonaceous catalysts with high coverage of acidic functionality on the surface and this catalytic system could depolymerize amorphous cellulose to 39% production yield of glucose while acidic functionality was presented at a catalytic ratio of 4.8 mol%. Above all, both teams could continue efforts on rational catalyst design for valorization of biomass based upon we have learned from each other in the past two years.


 

因全球對再生能源的需求增加及原油存量漸減,將廢棄木質纖維素生物質高值化的科研課題已吸引眾多研究團隊投入研發。感謝此台大與中研院雙邊創新性合作計畫,使得兩造研究團隊在過去兩年間得以結合雙邊各自優勢技術並向共同目標合作,開發新穎觸媒系統應用於廢棄木質纖維素生物質轉化精緻化學品。例如將羥甲基糠醛(HMF) 轉化成呋喃衍生物即為研究亮點,如以銠負載活性碳觸媒能有效氧化糠醛產生呋喃二甲酸(FDCA),以釕負載多孔碳觸媒能有效氫化生產二甲基呋喃 (DMF),另如包括將單醣選擇性地轉化為糠醛、及提出有效降解纖維素的過程機制等,部分成果已獲得國際著名期刊ACS Sustainable Chemistry & Engineering 和 Sustainable Energy Fuels 的發表且另兩份論文即將定稿。

中研院課題組開發表面具高官能基團覆蓋率的碳質催化劑,能以少量催化劑即可使有效降解非晶相纖維素。最近臺灣大學課題組投入木質纖維素生物質中的木質素研究中,成功提出木質素降解的液相工序,其採用乙醇/水共溶劑的環保方法能有效降解木質素,優化製程後生質油產量達到89.3 wt%,單體組成總產率高達2.89 wt%,且alkyl guaiacols 占主要成份。基於階段性計劃結束,兩造團隊將賡續在互相合作學習的基礎上,開發新穎觸媒系統,為生質能轉換找尋一條綠色大道。