Hydrogenation of nitrobenzene in trickle bed reactor over NiSio2 catalyst
Other Title(s)
هدرجة النتروبنزين في مفاعل سيحي بإستخدام النيكل سيليكا كعامل مساعد
Author
Source
Issue
Vol. 19, Issue 10 (31 Oct. 2013), pp.1314-1326, 13 p.
Publisher
University of Baghdad College of Engineering
Publication Date
2013-10-31
Country of Publication
Iraq
No. of Pages
13
Main Subjects
Abstract AR
تم استخدام المفاعل السيحي لدراسة عملية هدرجة النتروبنزين على العامل المساعد نيكل / سيليكا.
تم تحضير العامل المساعد باستخدام تكتيك ال HDC.
تم استعمال حبيبات السيليكا المسامية (شكل اسطواني 5.5 × 6) كمادة حاملة للعامل المساعد.
تم إيجاد خواص العامل المساعد المحضر بفحص TPR و طريقة BET للمساحة السطحية و حجوم المسامات و التحليل الطيفي بطريقة انكسار أشعة أكس و كذلك التحليل الطيفي بجهاز رامان.
تم شحن المفاعل بالعامل المساعد المخفف بكرات الزجاج الدقيقة و ذلك لخفض التأثيرات الخارجية كانتقال المادة و انتقال الحرارة و تأثير الجدار.
و قد وجد أن استخدام الحبيبات الدقيقة مع العامل المساعد في المفاعل قد أدى الى مضاعفة محتوى السائل في المفاعل و الذي أدى بدوره الى زيادة درجة تبلل العامل المساعد و بالتالي زيادة معدل انتقال المادة للسائل و الغاز كان المنتج الرئيسي من تفاعل هدرجة.
Abstract EN
Trickle bed reactor was used to study the hydrogenation of nitrobenzene over Ni / SiO2 catalyst.
The catalyst was prepared using the Highly Dispersed Catalyst (HDC) technique.
Porous silica particles (capped cylinders, 6 x 5.5 mm) were used as catalyst support.
The catalyst was characterized by TPR, BET surface area and pore volume, X-ray diffraction, and Raman Spectra.
The trickle bed reactor was packed with catalyst and diluted with fine glass beads in order to decrease the external effects such as mass transfer, heat transfer and wall effect.
The catalyst bed dilution was found to double the liquid holdup, which increased the catalyst wetting and hence, the gas-liquid mass transfer rate.
The main product of the hydrogenation reaction of nitrobenzene was aniline.
Reaction operating conditions, i.e., temperature, liquid flow rate, and initial feed concentration were investigated to find their influences on the conversion and rate of nitrobenzene hydrogenation.
Under normal conditions without bed dilution, the system was mass transfer controlled.
In the diluted reactor, on the other hand, the resistance of mass transfer was nearly absent and the system became under surface kinetic control.
The catalyst showed significant deactivation during the reaction period due to the adsorption of intermediate amine products on the surface of the catalyst.
The kinetic study revealed that the reaction is zero order with respect to nitrobenzene concentration for the range of concentration between 0.58 to 1.17 mol / L while it was of positive order for the initial concentration less than 0.58 mol / L.
American Psychological Association (APA)
Abd al-Wahhab, Majid Ibrahim. 2013. Hydrogenation of nitrobenzene in trickle bed reactor over NiSio2 catalyst. Journal of Engineering،Vol. 19, no. 10, pp.1314-1326.
https://search.emarefa.net/detail/BIM-341629
Modern Language Association (MLA)
Abd al-Wahhab, Majid Ibrahim. Hydrogenation of nitrobenzene in trickle bed reactor over NiSio2 catalyst. Journal of Engineering Vol. 19, no. 10 (Oct. 2013), pp.1314-1326.
https://search.emarefa.net/detail/BIM-341629
American Medical Association (AMA)
Abd al-Wahhab, Majid Ibrahim. Hydrogenation of nitrobenzene in trickle bed reactor over NiSio2 catalyst. Journal of Engineering. 2013. Vol. 19, no. 10, pp.1314-1326.
https://search.emarefa.net/detail/BIM-341629
Data Type
Journal Articles
Language
English
Notes
Includes appendices : p. 1323-1326
Record ID
BIM-341629