کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6582445 | 456353 | 2016 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Acetophenone hydrogenation on Rh/Al2O3 catalyst: Intrinsic reaction kinetics and effects of internal diffusion
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Acetophenone hydrogenation on 1% Rh/Al2O3 catalyst was conducted using various support sizes to study intrinsic kinetics and internal diffusion effects. In the first part of this work, results from different noble metals and supports were compared, and the 1% Rh/Al2O3 was selected. From experiments at 60-100 °C, 1.1-4.1 MPa PH2 and 0.04-0.4 M CAP.o using powder catalysts, intrinsic reaction kinetic modeling with the Langmuir-Hinshelwood mechanism was conducted. The selected kinetic model included dissociative and non-competitive hydrogen adsorption, along with saturated active sites for organic species, and surface reaction as the rate determining step. With the obtained intrinsic reaction kinetics, internal diffusion effects were investigated using two catalyst particle sizes and diffusion-reaction models. The properties of the egg-shell type catalyst particles, including metal dispersion, were characterized and utilized in the models. The concentration-time profiles calculated from models developed in this work correspond well with the experimental results, explaining the effects of internal diffusion inside catalyst particles on reaction rates and selectivity, and are suitable for future use in trickle-bed reactor modeling studies.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 288, 15 March 2016, Pages 711-723
Journal: Chemical Engineering Journal - Volume 288, 15 March 2016, Pages 711-723
نویسندگان
Shinbeom Lee, Zhiyang Yu, Nikolay Zaborenko, Arvind Varma,