research centers


Search results: Found 4

Listing 1 - 4 of 4
Sort by

Article
Naphtha desulfurization by prepare Cu-Ni-zeolite adsorbent

Loading...
Loading...
Abstract

For desulfurization of naphtha, NaY zeolite was prepared from Dewekhala kaolin clay (Al-Anbar region). For the prepared zeolite adsorbent, x-ray diffraction, sodium content, silica to alumina ratio, surface area, bulk density and crushing strength were determined. From the x-ray diffraction of the prepared NaY zeolite and by a comparison with the standard NaY zeolite, it was found that the prepared adsorbent in this work has approximately the same crystal structure as the standard. Adsorption process was done in a laboratory unit at 25 ᵒC and 4.1 h-1 LHSV. The experimental results show that the promoted adsorbent gives higher percentage of sulfur removal (82.15%) after 10 minute and reaching 40.15% after 120 minute. The adsorption capacity is equal 0.167 mmole "S"/ g after 10 minute while it reached up to 0.77 and 0.98 mmole "S"/g at 50 and 120 minute, respectively


Article
Preparation and Characterization of Nay Zeolite for Biodiesel Production

Authors: Rowaida N. Abbas --- Ammar S. Abbas
Journal: Iraqi Journal of Chemical and Petroleum Engineering المجلة العراقية للهندسة الكيمياوية وهندسة النفط ISSN: 19974884/E26180707 Year: 2015 Volume: 16 Issue: 2 Pages: 19-29
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Iraqi kaolin was used for the preparation and characterization of NaY zeolite for biodiesel production via esterification reaction. Oleic acid was used usually as a typical simulated feedstock of high acid number for the esterification reaction. The chemical composition for the prepared Nay zeolite is as following: (Ca2.6Na1.K0.1)(Al6.3Si17.7)O48.16H2O, the silica to alumina ratio in the prepared catalyst was found equal to 2.6 and Na2O content was 12.26 wt. %, with relative crystallinity equal to 147.4 % obtained by the X-ray diffraction. The surface area result shows that the prepared catalyst has 330 m2/g. While, the measured pore volume by nitrogen adsorption was equal to 0.35 cm3/ g. SEM images show notable differences between the kaolin crystal and prepared NaY crystal. The effect of NaY zeolite, as a loaded catalyst in the esterification of oleic acid reaction did not show any significant change of oleic acid conversion for catalyst load more than 5 wt. %. The reused NaY zeolite is loses 31 % of its activity because of that the pores are filled with water and other organic molecules and that may cause poisoning the catalyst.


Article
Investigating the Influence of the Cerium loading in prepared Y zeolite from Iraqi kaolin on its Catalytic Performance
دراسة تأثير تحميل السيريوم في زيوليت Y المحضر من الكاولين العراقي على أدائه التحفيزي

Author: Karim Khalifa Esgair كريم خليفه ازغير
Journal: Journal of Engineering مجلة الهندسة ISSN: 17264073 25203339 Year: 2018 Volume: 24 Issue: 1 Pages: 70-82
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

In this study, the effects of different loading doses of cerium in the prepared NaY zeolite from Iraqi kaolin were investigated. Al-Duara refinery atmospheric residue fluid catalytic cracking was selected as palpation reaction for testing the catalytic activity of cerium loading NaY zeolite. The insertion of cerium in NaY zeolites has been synthesized by simple ion exchange methods. Three samples of modified zeolite Y have been obtained by replacing the sodium ions in the original sample with cerium and the weight percent added are 0.35, 0.64, and 1.06 respectively. The effects of cerium loading to zeolite Y in different weight percent on the cracking catalysts were studied by employing a laboratory fluidized bed reactor. The experiments have been performed with weight hourly space velocity (WHSV) range from 6 to 24 h-1, and the temperature range from 450 to 510 oC.The activity of the catalyst with 1.06 wt% cerium has been shown to be much greater than that of the sample parent NaY. Also it was observed that the addition of the cerium causes an increase in the thermal stability of the zeolite.

في هذه الدراسه. تم بحث تأثير تحميل السيريوم في الزيولايت Y المحضر من الكاؤلين العراقي . تفاعل التكسير الحفازي المائع لمتبقي التقطير الجوي تم اختياره كمجس لاختبار الفعالية الحفازية للزيولايت المحسن والمحضر نوع NaY . الزيولايت المطور تم تصنيعه بطريقة التبادل الايوني البسيط .ثلاثة نماذج من الزيولايت المطورتم الحصول عليها عن طريق استبدال ايون الصوديوم في النموذج الاصلي بالسيريوم وبالنسب الوزنية المئويه التالية , 0. 35 0.64 , 1.06 تأثير تحميل السيريوم للزيولايت وبنسب وزنية مختلفة على الفعالية التكسيرية تم بحثه باستخدام منظومه مختبريه تجريبيه لمفاعل الطبقة المميعة . التجارب المختبرية اجريت عند سرع وزنية فراغيه بين 6 الى 24ساعه-1 وبدرجة حرارة من 450 الى 510 درجة مئوية. الفعالية الحفازية للعامل المساعد المحتوي على نسبه وزنية من السيريوم بمقدار 1.06 كانت اكبر بكثير من الفعالية الحفازية للعامل المساعد الاصلي . وكذلك تم ملاحظة ان اضافة السيريوم ادت الى زيادة الثباتية الحرارية للزيولايت .


Article
The Catalytic Activity of Modified Zeolite Lanthanum on the Catalytic Cracking of Al-Duara Atmospheric Distillation Residue.
تأثيرالفعليه الحفازيه للزيولايت المطور باللنثانيوم على التكسير الحفازي لمتبقي التقطير الجوي لمصفى الدوره

Author: Karim Khalifa Esgair كريم خليفه ازغير
Journal: Journal of Engineering مجلة الهندسة ISSN: 17264073 25203339 Year: 2016 Volume: 22 Issue: 3 Pages: 36-48
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Atmospheric residue fluid catalytic cracking was selected as a probe reaction to test the catalytic performance of modified NaY zeolites and prepared NaY zeolites. Modified NaY zeolites have been synthesized by simple ion exchange methods. Three samples of modified zeolite Y have been obtained by replacing the sodium ions in the original sample with lanthanum and the weight percent added are 0.28, 0.53, and 1.02 respectively. The effects of addition of lanthanum to zeolite Y in different weight percent on the cracking catalysts were investigated using an experimental laboratory plant scale of fluidized bed reactor. The experiments have been performed with weight hourly space velocity (WHSV) range of 6 to 24 h-1, and the range of temperature from 450 to 510 oC.The activity of the catalyst with 1.02 wt% lanthanum has been shown to be much greater than that of the sample parent NaY. Also it was observed that the addition of the lanthanum causes an increase in the thermal stability of the zeolite.

تم اختيار تفاعل التكسير الحفازي المائع لمتبقي التقطير الجوي كمجس لاختبار الفعالية الحفازية للزيولايت المحسن والمحضر نوع NaY . الزيولايت المطور تم تصنيعه بطريقة التبادل الايوني البسيط .ثلاثة نماذج من الزيولايت المطورتم الحصول عليها عن طريق استبدال ايون الصوديوم في النموذج الاصلي باللنثانيوم وبالنسب الوزنية المؤيه التالية 0.28, , 0.53 , 1.02 . تأثير اضافة اللنثانيوم للزيولايت وبنسب وزنية مختلفة على الفعالية التكسيرية تم بحثه باستخدام منظومه مختبريه تجريبيه لمفاعل الطبقة المميعة . التجارب المختبرية اجريت عند سرع وزنية فراغيه بين 6 الى 24ساعه-1 وبدرجة حرارة من 450 الى 510 درجة مئوية. الفعالية الحفازية للعامل المساعد المحتوي على نسبه وزنية من اللنثانيوم بمقدار 1.02 كانت اكبر بكثير من الفعالية الحفازية للعامل المساعد الاصلي . وكذلك تم ملاحظة ان اضافة اللنثانيوم ادت الى زيادة الثباتية الحرارية للزيولايت .

Listing 1 - 4 of 4
Sort by
Narrow your search

Resource type

article (4)


Language

English (4)


Year
From To Submit

2018 (1)

2016 (1)

2015 (1)

2014 (1)