Reuse of spent hydrotreating catalyst of the middle petroleum fractions
Other Title(s)
اعادة تدوير العامل المساعد المستهلك و المستخدم في هدرجة المستقطرات الوسطية
Joint Authors
Hammadi, Khalid K.
Abd al-Wahhab, Majid Ibrahim
Source
Iraqi Journal of Chemical and Petroleum Engineering
Issue
Vol. 20, Issue 1 (31 Mar. 2019), pp.15-21, 7 p.
Publisher
University of Baghdad College of Engineering
Publication Date
2019-03-31
Country of Publication
Iraq
No. of Pages
7
Main Subjects
Topics
Abstract EN
Reuse of spent hydrodesulphurization (HDS) of middle petroleum fractions catalyst CoMo / γAl2O3 was accomplished via removal of coke and contaminants such as vanadium, Iron, Nickel, and sulfur.
Three processes were adopted; extraction, leaching, decoking.
Soluble and insoluble coke was removed.
Leaching step used three different solvents (oxalic acid, ammonium peroxydisulfate and oxalic acid + H2O2) in separate in order to remove contaminant metals (V, S, Ni and Fe).
The effect of soluble coke removal on leaching step was studied.
It was found that the removal of soluble coke significantly enhances the leaching of contaminants and barely affected the removal of active metals (Co and Mo).
It was found that the best route (sequence) was soluble coke extraction followed by contaminants leaching then decoking process and the best leaching solvent was oxalic acid.
According to this determination, the removed contaminants were 79.9 % for sulfur, 13.69 % for vanadium, 82.27 % for iron, and 76.34 % for nickel.
The active components loss accompanied with this process were 5.08 % for cobalt and 6.88 % for molybdenum.
Leaching process conditions (leaching solvent concentration, temperature and leaching time) were studied to determine the best-operating conditions.
The rejuvenated catalyst activity was examined by a pilot scale HDS unit of naphtha.
Sulfur content removal of naphtha was found to be 85.56 % for single pass operation under typical operating conditions of refinery HDS unit of naphtha which are 1 ml / min feed flow rate, 200 H2 / HC ratio, 32 bar operating pressure and 320 °C operating temperature.
American Psychological Association (APA)
Abd al-Qahar, Safa Nabil& Abd al-Wahhab, Majid Ibrahim& Hammadi, Khalid K.. 2019. Reuse of spent hydrotreating catalyst of the middle petroleum fractions. Iraqi Journal of Chemical and Petroleum Engineering،Vol. 20, no. 1, pp.15-21.
https://search.emarefa.net/detail/BIM-893017
Modern Language Association (MLA)
Abd al-Wahhab, Majid Ibrahim…[et al.]. Reuse of spent hydrotreating catalyst of the middle petroleum fractions. Iraqi Journal of Chemical and Petroleum Engineering Vol. 20, no. 1 (Mar. 2019), pp.15-21.
https://search.emarefa.net/detail/BIM-893017
American Medical Association (AMA)
Abd al-Qahar, Safa Nabil& Abd al-Wahhab, Majid Ibrahim& Hammadi, Khalid K.. Reuse of spent hydrotreating catalyst of the middle petroleum fractions. Iraqi Journal of Chemical and Petroleum Engineering. 2019. Vol. 20, no. 1, pp.15-21.
https://search.emarefa.net/detail/BIM-893017
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 22
Record ID
BIM-893017