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首页> 外文期刊>Journal of industrial and engineering chemistry >Sodium nitrate modified SBA-15 and fumed silica for efficient production of acrylic acid and 2,3-pentanedione from lactic acid
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Sodium nitrate modified SBA-15 and fumed silica for efficient production of acrylic acid and 2,3-pentanedione from lactic acid

机译:硝酸钠改性的SBA-15和气相二氧化硅,可有效地从乳酸生产丙烯酸和2,3-戊二酮

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摘要

The catalytic conversion of lactic acid to acrylic acid and 2,3-pentanedione over sodium nitrate-supported mesoporous SBA-15 and fumed silica was studied. The yields of acrylic acid, 2,3-pentanedione, and acetaldehyde are 44.8%, 25.1%, and 13.3%, respectively, over the 23%NaNO3/SBA-15 catalyst. The performance of the catalysts is strongly affected by NaNO3 loading, catalyst texture and porosity, and product diffusion efficiency. A proper control of NaNO3 loading can result in modification catalyst structure for improvement of 2,3-pentanedione selectivity. Under certain reaction conditions, the surface NaNO3 species can readily transform to sodium lactate that functions as active component to catalyze the target reactions.
机译:研究了硝酸钠负载的中孔SBA-15和气相法二氧化硅催化乳酸向丙烯酸和2,3-戊二酮的催化转化。相对于23%NaNO 3 / SBA-15催化剂,丙烯酸,2,3-戊二酮和乙醛的产率分别为44.8%,25.1%和13.3%。催化剂的性能受NaNO3的负载,催化剂的质地和孔隙率以及产物扩散效率的影响很大。适当地控制NaNO 3的负载量可导致修饰催化剂结构,以改善2,3-戊二酮的选择性。在某些反应条件下,表面的NaNO3物质可以很容易地转化为乳酸钠,而乳酸钠起着催化目标反应的活性成分的作用。

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