ORIENTAL JOURNAL OF CHEMISTRY www.orientjchem.org An International Open Access, Peer Reviewed Research Journal ISSN: 0970-020 X CODEN: OJCHEG 2021, Vol. 37, No.(1): Pg. 40-45 This is an Open Access article licensed under a Creative Commons license: Attribution 4.0 International (CC- BY). Published by Oriental Scientific Publishing Company © 2018 Oily Sludge Recovery using Microwave Pyrolysis Technique KHAMAEL M. ABUALNAJA 1 , HALA M. ABO-DIEF 2 *, OLA A. ABU ALI 1 , ABDULLAH AL-ANAZI 4 and ASHRAF T. MOHAMED 3 1,2,3,4 Department of Chemistry, Al-Taif Faculty of Science, Al-Taif University, Al-Taif, Kingdom of Saudi Arabia. 1 On leave from the Egyptian Petroleum Research Institute, Nasr City, Cairo, Egypt. 3 Design and Production Department, Faculty of Engineering, Minia University, Minia, Egypt. *Corresponding author E-mail: Mohamed.hala91@yahoo.com http://dx.doi.org/10.13005/ojc/370104 (Received: November 09, 2020; Accepted: February 20, 2021) ABSTRACT The oily sludge treatments catch widespread attention. But, management of sludge is difficult and costly undertaking. The oil recovery pyrolysis temperature, heating rate and carbon wt.% is discussed. The recovered aliphatic, aromatic, elemental components and gases were obtained with respect to the nitrogen flow rate. The present work showed that as the heating rate increases, both the % pyrolysis oil and gases increases up to 600 o C, while the % pyrolysis char decreases. Beyond 600 o C the pyrolysis gases % increases, the pyrolysis oil % decreases while the % pyrolysis char continuous decreases. Gas chromatography, and calorific value used to examine the hydrocarbon compositions of the virgin, sludge, and pyrolysis oils. Keywords: Virgin, Sludge and pyrolysis oils, Oil recovery temperature, Heating rate and carbon wt.%, Oil recovery and gas chromatography, microwave, calorific value. INTRODUCTION The fossil fuels largest consumption with the energy challenge, environmental sustainability, and cleaner energy requirements attracted interest in recent years 1-2 . Bilo'o, and Benoît 3 stated that alternate sources such as renewable energy are required. The goal of many countries to increase their economies income is crude oil, despite the outcome that has towards the environment. Oil wastes making dangerous risk for human health and natural 4-5 . Oily sludge generated during the production, transportation, storage and in the oil refinery plants 6-7 . Abo-Dief et al., 8 produced biodiesel from five fresh vegetable oils. Roozbehani 9 discussed the potentials and the related issues of combusting crude oil sludge to obtain the best concentration with three main factors, including pH, bio-surfactant concentration and salinity. Through adding manure, Liu et al., 10 and Kumar and Mohan 11 conducted bioremediation of oily sludge. Gozan 12 showed that the sludge oil range from benzene, phenols to polycyclic aromatic hydrocarbons, but Hu et al., 13 stated that little attention paid to handle crude oil. Islam 14 found that the sludge containing recoverable oil less than 40%. Chen et al., 15 examined the sewage sludge pyrolysis process for pyrolytic oil.