A series of xwt%Al-SBA-15 catalysts prepared by modified wetness impregnation was investigated for γ-valerolactone (GVL) decarboxylation to butene. It was found that the impregnation of Al species not only remained the ordered mesoporous structure of parent SBA-15, but also created large amounts of Brønsted and Lewis acid sites on the surface of catalyst. The considerable amount of solid acid sites and the suitable Brønsted/Lewis acid ratio endowed 2.23 wt%Al-SBA-15 catalyst an excellent catalytic performance. Under the optimized conditions, the GVL conversion and butene yield can reach 99.8% and 96.6% at 320 °C, respectively. Mechanism studies indicated that the decarboxylation of γ-protonated PEA controlled speed of the whole reaction. Moreover, the catalytic activity of regenerated 2.23 wt%Al-SBA-15 catalyst was satisfactory after eight cycle tests, and the butene yield could still reach 92.2%.

一系列x研究了通过改良湿浸渍法制备的 wt%Al-SBA-15 催化剂用于 γ-戊内酯 (GVL) 脱羧生成丁烯。发现Al物质的浸渍不仅保持了母体SBA-15的有序介孔结构，而且还在催化剂表面产生了大量的Brønsted和Lewis酸位点。大量的固体酸位和合适的布朗斯台德/路易斯酸比赋予了 2.23 wt% Al-SBA-15 催化剂优异的催化性能。在优化条件下，320℃下GVL转化率和丁烯收率分别达到99.8%和96.6%。机理研究表明，γ-质子化PEA的脱羧控制了整个反应的速度。此外，经过八次循环测试后，再生的 2.23 wt% Al-SBA-15 催化剂的催化活性令人满意，