The present work deals with isomerization of straight chain paraffin, n-hexane with an aim to make up loss in gasoline quantity as well as octane. This is due to its reduced benzene content warranted by its carcinogenic nature. Performance of impregnation of alkaline earth metals (Mg, Ca, Sr, and Ba) on Pt/desilicated (and dealuminated) zeolites Beta was studied and found that isomer selectivity as high as 99% with stable catalytic performance is achievable. Furthermore, replacing part of hydrogen (15%) with carbon dioxide in hydrogen as carrier gas improves hexane conversion. Hexane conversion increased as Mg–< Ba–< Ca–< Sr–Pt/deSi Beta. Observed performance parameters have been explained on the basis of reported variation in acidity due to both alkaline earth metals and CO₂.

中文翻译：

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碱土金属和CO 2对正己烷异构化中分级β沸石性能的综合影响

目前的工作涉及直链烷烃异构化，ñ正己烷，旨在弥补汽油量损失以及辛烷值。这是由于其致癌性保证了苯含量的降低。研究了在Pt /脱硅（和脱铝）沸石Beta上浸渍碱土金属（Mg，Ca，Sr和Ba）的性能，发现异构体选择性高达99％，具有稳定的催化性能。此外，用氢气中的二氧化碳作为载气代替部分氢气（15％）可提高己烷转化率。己烷转化率随着Mg– <Ba– <Ca– <Sr–Pt / deSi Beta的增加而增加。根据已报道的由于碱土金属和CO ₂引起的酸度变化，对观察到的性能参数进行了解释。