• study on the influence of channel structure properties in the dehydration of glycerol to acrolein over h-zeolite catalysts

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 884
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     systematic studies have been conducted over several selected h-zeolites, namely hzsm-5, h-beta, hy, nano hzsm-5, hzsm-11 and nano hzsm-11, aimed to investigate influence of the channel structure on catalytic performance for gas phase dehydration of glycerol to acrolein. compared to h-beta and hy, improved catalytic performance was discovered over hzsm-5, which demonstrated that h-zeolites with smaller channels, the ones marginally larger than the molecular diameter of glycerol, were preferential for the reaction. hzsm-11, with lower channel complexity, was more likely to obtain superior catalytic performance due to enhanced diffusion. nano hzsm-11 (300–500 nm) exhibited excellent catalytic performance with 81.6 mol% glycerol conversion and 74.9 mol% acrolein selectivity at ghsv as high as 873 h−1 (tos = 8 h). bet and tem experiment results indicated that coke was initially deposited at channel intersections of h-zeolites, and when the channel blockage came up to a certain extent, there arrived the onset of coke deposition on the external surface.

سوال خود را در مورد این مقاله مطرح نمایید :

با انتخاب دکمه ثبت پرسش، موافقت خود را با قوانین انتشار محتوا در وبسایت تی پی بین اعلام می کنم
مقالات جدیدترین رویدادها