A series of boron modified V-MCM-41 catalysts were in situ synthesized. The modification effect of boron to the vanadium species and catalytic performances were systematically studied. The catalysts could still maintain mesoporous structure and relatively large specific surface area after boron modification. Boron species were mainly in the form of triangular [BO₃]³⁻ units on the surface and the pores of the catalysts. The introduction of boron could effectively enhance the dispersion of vanadium species and increase the amount of surface vanadium sites. The catalysts showed high activity towards iso-butane dehydrogenation. The results of catalytic tests showed that both the iso-butane conversion and iso-butene selectivity improved with the presence of boron species. The best catalytic performance was obtained on the sample with the maximum vanadium sites. The performance of the catalyst still remained stable after several cycles of tests and regenerations, which was promising for industrial application in moving bed or fluidized bed reactor in the future.

原位合成了一系列硼改性的V-MCM-41催化剂。系统地研究了硼对钒的改性作用及催化性能。硼改性后，催化剂仍可保持介孔结构和较大的比表面积。硼物种主要呈三角形[BO ₃ ] ^{3−的形式}催化剂的表面和孔上的单元。硼的引入可以有效地增强钒种类的分散并增加表面钒位点的数量。催化剂显示出对异丁烷脱氢的高活性。催化试验的结果表明，随着硼的存在，异丁烷转化率和异丁烯选择性均得到改善。在具有最大钒位点的样品上获得了最佳的催化性能。经过数个测试和再生循环后，催化剂的性能仍保持稳定，这有望在未来的移动床或流化床反应器中工业应用。