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          我所在合成氣定向轉化方面取得新進展

            近日,我所潘秀蓮研究員、包信和院士帶領團隊在合成氣定向轉化方面取得新進展,相關結果發表在《德國應用化學》(Angewandte Chemie-International Edition)上。

            C-C偶聯的精準調控一直是C1化學最核心也是最具挑戰性的問題,是煤和天然氣高效利用的關鍵。該團隊近年來提出了OX-ZEO催化劑設計概念,通過部分還原的金屬氧化物和分子篩耦合的納米復合雙功能催化劑,使合成氣化學中CO活化與C-C偶聯這兩個關鍵步驟有效分離,已經實現了高選擇性地生成C2=-C4=混合低碳烯烴(Science,2016; ACS Catalysis,2017; ACS Catalysis,2019)、乙烯(Angew. Chem. Int. Ed.,2018)和芳烴(Chemical Communications,2017; Journal of Energy Chemistry,2019)。

            該團隊進一步利用一維十元環直通孔道分子篩的限域擇型作用調變了反應產物,可將合成氣一步轉化制備出高品質汽油。當CO轉化率為20%時,烴類產物中汽油的選擇性高達77%,高于Anderson-Schulz-Flory(ASF)分布中汽油最高選擇性(48%)。更重要的是,汽油中異構烷烴含量高,研究法辛烷值(RON)達92(辛烷值是反映燃料抗爆性能的數字指標,辛烷值越高代表燃料抗爆性能越好,經過傳統低溫費托合成獲得的汽油的RON大約是35-43),且其中芳烴含量降至16%,低于國標中限定的芳烴含量(<35%)。

            該研究成果為合成氣直接制高品質汽油的發展提供了新的研究思路與重要的科學依據,也再次驗證了OX-ZEO催化劑設計概念具有一定普適性,開拓了煤經合成氣轉化制化學品的新戰略、新途徑。

            該工作得到國家科技部、自然科學基金委員會,以及中科院的資助。(文/圖 李娜、焦峰)

          版權所有 © 中國科學院大連化學物理研究所 本站內容如涉及知識產權問題請聯系我們 備案號:遼ICP備05000861號 遼公網安備21020402000367號
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