The impact of desilication on the performance of a series of alkali-treated NaY zeolites impregnated with 5 wt.% of magnesium for glucose isomerisation into fructose has been studied. Desilication at different NaOH concentrations increases the mesoporous volume and external surface area, without compromising microporosity and crystallinity. The observed reduction of the microporous volume due to magnesium impregnation was found to decrease for the alkali-treated zeolites. Higher density and strength of basic sites and stronger magnesium-support interaction were also achieved with the treatment. These improved properties resulted in a significant increase of both glucose conversion and fructose yield on the magnesium-doped desilicated zeolites. Glucose conversion continuously increases with desilication (28–51%), whereas fructose yield passes through a maximum (35%) at low desilication levels. Among the prepared desilicated samples, low-severity alkali-treated zeolites also show lower deactivation in consecutive reaction runs, as well as superior regeneration behaviour. Thus, hierarchical NaY zeolites impregnated with magnesium could be favourably used for glucose isomerisation into fructose if suitable alkaline treatment conditions are selected, with low-severity treated NaY zeolites being the best choice. Higher fructose productivities were achieved for the low-severity desilicated zeolites than for higher magnesium content NaY zeolites reported previously, leading to a lower Mg requirement.

已经研究了脱硅对一系列浸渍有5％（重量）镁的碱处理的NaY沸石的性能的影响，这些沸石用于将葡萄糖异构化为果糖。在不同的NaOH浓度下，脱硅会增加中孔体积和外表面积，而不会影响微孔和结晶度。发现对于碱处理的沸石，观察到的由于镁浸渍引起的微孔体积的减少减少了。该处理还实现了更高的密度和碱性位点强度以及更强的镁-载体相互作用。这些改善的性能导致掺镁脱硅沸石的葡萄糖转化率和果糖产率均显着增加。葡萄糖的转化随着去硅的作用而持续增加（28–51％），而低脱水水平下的果糖产量最高（35％）。在制备的脱硅酸盐样品中，低强度碱处理的沸石在连续的反应运行中也显示出较低的失活性以及优异的再生性能。因此，如果选择合适的碱处理条件，则用镁浸渍的分级NaY沸石可以有利地用于葡萄糖异构化为果糖，其中低强度处理的NaY沸石是最佳选择。与以前报道的较高镁含量的NaY沸石相比，低强度脱硅酸盐沸石的果糖生产率更高，从而导致对镁的需求量降低。低强度碱处理的沸石在连续的反应运行中也显示出较低的失活，以及优异的再生性能。因此，如果选择合适的碱处理条件，则用镁浸渍的分级NaY沸石可以有利地用于葡萄糖异构化为果糖，其中低强度处理的NaY沸石是最佳选择。与以前报道的较高镁含量的NaY沸石相比，低强度脱硅酸盐沸石的果糖生产率更高，从而导致对镁的需求量降低。低强度碱处理的沸石在连续的反应运行中也显示出较低的失活，以及优异的再生性能。因此，如果选择合适的碱处理条件，则用镁浸渍的分级NaY沸石可以有利地用于葡萄糖异构化为果糖，其中低强度处理的NaY沸石是最佳选择。与以前报道的较高镁含量的NaY沸石相比，低强度脱硅酸盐沸石的果糖生产率更高，从而导致对镁的需求量降低。低强度处理的NaY沸石是最佳选择。与以前报道的较高镁含量的NaY沸石相比，低强度脱硅酸盐沸石的果糖生产率更高，从而导致对镁的需求量降低。低强度处理的NaY沸石是最佳选择。与以前报道的较高镁含量的NaY沸石相比，低强度脱硅酸盐沸石的果糖生产率更高，从而导致对镁的需求量降低。