کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
63253 47677 2006 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Improving bifunctional zeolite catalysts for alkane hydroisomerization via gas phase sulfation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Improving bifunctional zeolite catalysts for alkane hydroisomerization via gas phase sulfation
چکیده انگلیسی

Pt-containing H-BEA zeolites were functionalized with sulfate anions via H2S chemisorption followed by oxidation. This treatment generates sulfate groups and Brønsted acidic sites, modifies the supported metal particles, and leads to higher activity and selectivity for pentane hydroisomerization. The strength and the accessibility of the acid sites present in the parent material were not affected by this procedure. The concentration of Brønsted acidic sites and the catalytic activity for light alkane isomerization varied sympathetically. The parallel increase in isomerization selectivity indicates that either the residence time of the alkoxy intermediates decreases for the modified samples (suppressing undesired cracking reactions on the acid sites) or the selective decoration of the Pt particles with sulfur reduces hydrogenolysis on the metal particles.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Catalysis - Volume 237, Issue 2, 25 January 2006, Pages 337–348
نویسندگان
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