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Parametric Study on Intrinsic Reaction for Straight Run Heavy Naphtha Hydrodesulfurization over CoMo/Al2O3 Catalyst

Authors: Mohammad F. Abid --- Mohammed K. Abdullah --- Salah M. Ali
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2018 Volume: 36 Issue: 2 Part (A) Engineering Pages: 146-153
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

The present study aimed to investigate the intrinsic reaction of hydrodesulfurization (HDS) for a real Straight Run Heavy Naphtha (SRHN) over CoMo-S/Al2O3 catalyst in a fixed- bed reactor. Influence of the process parameters on sulfur removal was investigated by regulating the temperature (T = 320-380 oC), pressure (P = 20 to 35 bar), weight hour space velocity (WHSV = 2.5 to 5.0 h-1) and catalyst average particle size (dp =361 to 3950 μm). Mears and Weisz-Prater criteria were estimated and utilized to validate the intrinsic reaction condition. Operating variables were optimized at (T = 360 oC, P = 30 bars, WHSV = 2.5 h-1, dp= 361 μm) to obtain an optimum sulfur removal of 93.4% under intrinsic reaction conditions. Experimental results showed that % activity of sulfur removal increases to 93.4% as temperature increased to 360oC but it reduces to 90.3% as space velocity increased to 5.0 h-1. Kinetic parameters of the intrinsic reaction rate were estimated and compared with published data. Long-time test was performed on the sulfided catalyst to investigate its activity.


Article
Least Common Multiplier and Greatest Factorial Factorization for Gosper's Algorithm
المضاعف المشترك الأصغر والتحليل للعامل الأعظم لخوارزمية كَوسبر

Author: Husam L. Saad Mohammed K. Abdullah حسام لوتي سعد محمد خلف عبد الله
Journal: basrah journal of science البصرة للعلوم ISSN: 18140343 Year: 2015 Volume: 33 Issue: 1A Pages: 70-83
Publisher: Basrah University جامعة البصرة

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Abstract

The objective of this paper is to give an approach of Gosper's algorithm that frequently used in proving combinatorial identities. We give an approach for Gosper's algorithm by using greatest factorial factorization (GFF) and least common multiplier (lcm) concepts. This approach can be easily extends to the –analogues. To illustrate the applicability of our approach, example is presented.

الهدف في هذا البحث هو إعطاء أسلوب خوارزمية كَوسبر التي تستخدم بكثرة في برهان المتطابقات التوافقية .نعطي أسلوب خوارزمية كَوسبر باستخدام مفهومي التحليل للعامل الأعظم (GFF) والمضاعف المشترك الأصغر(lem) .هذا الأسلوب يمكن توسيعه للأسلوب المطابق q- .نقدم مثال لتوضيح تطبيق أسلوبنا.

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