This study discloses for the first time Au-lean Au–Pt/H-ZSM-5 catalysts for naphtha reforming reactions. Addition of 1 to 5 wt% Au to the Au-Pt bimetallic catalyst boosts aromatic production. Total metal content was 0.3 wt%. The effect of Au/Pt weight ratios of 0/100, 1/99, 2/98 and 5/95 on the product composition for a reaction temperature of 490 °C (4 bar pressure at a WHSV of 5.7 h⁻¹) has been studied. Au/Pt weight ratio of 1/99 results in the maximum aromatics production and naphthenes conversion. This ratio results in maximum para-xylene formation (15.1 wt% of total aromatics) and iso-pentane formation. The catalysts have been characterized by field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), temperature programmed reduction (TPR) and CO adsorption analyses. The Au/Pt weight ratio of 1/99 results in the minimal bimetallic aggregate particle size (2.65 nm). Based on TPR analysis, it is stated that the optimal Au-Pt/H-ZSM-5 catalyst consists of an Au-lean Au-Pt alloy beside Pt metal.

这项研究首次公开了用于石脑油重整反应的贫金Au-Pt / H-ZSM-5催化剂。向Au-Pt双金属催化剂中添加1-5重量％的Au促进了芳族化合物的生产。总金属含量为0.3重量％。Au / Pt重量比为0 / 100、1 / 99、2 / 98和5/95时，反应温度为490°C（WHSV为5.7 h ^-1时为4巴压力）对产品组成的影响）已被研究。1/99的Au / Pt重量比导致最大的芳烃生产和环烷烃转化率。该比率导致最大的对二甲苯形成（占全部芳族化合物的15.1重量％）和异戊烷形成。通过场发射扫描电子显微镜（FE-SEM），透射电子显微镜（TEM），X射线衍射（XRD），程序升温还原（TPR）和CO吸附分析对催化剂进行了表征。1/99的Au / Pt重量比导致最小的双金属聚集体粒径（2.65 nm）。基于TPR分析，表明最佳的Au-Pt / H-ZSM-5催化剂由Pt金属旁边的贫Au-Pt合金组成。