Different feedstocks were adopted to undergo reactions catalyzed by WO₃/SiO₂ and WO₃/SiO₂-MgO catalysts to better understand the effect of MgO on the process. The results of 1-butene self-metathesis show that, although the isomerization of 1-butene was clearly enhanced by MgO, the propylene selectivity was not improved because of insufficient 1-butene or ethylene. The main route to produce propylene in this system is through cross-metathesis of 1-butene and 2-butene. When propylene was used as the feed, more 2-butene, which was produced from propylene self-metathesis, was transformed into 1-butene by the addition of MgO, resulting in an improved metathesis performance between 1-butene and propylene. The cross-metathesis of 2-butene and ethylene, however, did not show an significant enhancement by MgO. In addition, the analysis on n-butene isomers distribution reveals that the presence of MgO is helpful in keeping the isomers at their theoretical values, leading to the good stability of the reactions. Lastly, a further comparison for the reactions between trans-2-butene and cis-2-butene demonstrates that there is little difference in their metathesis reactivity.

采用不同的原料进行WO ₃ / SiO ₂和WO ₃ / SiO ₂催化的反应-MgO催化剂可更好地了解MgO对工艺的影响。1-丁烯自复分解的结果表明，尽管MgO明显增强了1-丁烯的异构化，但是由于1-丁烯或乙烯不足，丙烯的选择性没有得到改善。在该系统中生产丙烯的主要途径是通过1-丁烯和2-丁烯的交叉复分解。当使用丙烯作为进料时，更多的由丙烯自复分解反应生成的2-丁烯通过添加MgO转化为1-丁烯，从而提高了1-丁烯与丙烯之间的复分解性能。然而，2-丁烯和乙烯的交叉复分解并未显示出MgO的显着增强。另外，对n的分析-丁烯异构体的分布表明，MgO的存在有助于将异构体保持在其理论值，从而使反应具有良好的稳定性。最后，对反式-2-丁烯和顺式-2-丁烯之间反应的进一步比较表明，它们的复分解反应性几乎没有差异。