کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7713360 1497427 2015 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dehydrogenation of pyrrolidine based liquid organic hydrogen carriers by an iridium pincer catalyst, an isothermal kinetic study
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Dehydrogenation of pyrrolidine based liquid organic hydrogen carriers by an iridium pincer catalyst, an isothermal kinetic study
چکیده انگلیسی
A previously known homogenous iridium POCOPtBu pincer catalyst and several pyrrolidine based liquid organic hydrogen carriers (LOHCs) were investigated under dehydrogenation conditions and analyzed in a pseudo first order kinetic fashion to determine various kinetic properties. Dehydrogenation onset temperatures (DOT) of 180, 160, and 140 °C; activation energies (EA) of 115, 142, and 166 (kJ/mol); and frequency factor (A) values of 3.56 × 108, 1.05 × 1011, and 2.17 × 1014 (s−1) were found for ethyl perhydro carbazole (EPHC, 2), methyl perhydro indole (MePHI, 3), and butyl pyrrolidine (BuPy, 4) respectively. The dehydrogenation onset temperatures correlate with collision frequency factors rather than the activation energies. This evidence suggests that it is a steric constraint approach of the LOHC rather than a barrier to C-H bond activation at the iridium center which limits the rate of reaction.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 40, Issue 46, 14 December 2015, Pages 16266-16270
نویسندگان
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