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Kaoline-based catalyst for a high stability desulfurization of sour heavy naphtha in a three-phase oscillatory baffled reactor

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Particuology 2024年第1期84卷 249-260页

作者： Hassan m.Hmood saba a.gheni.safaa m.r.ahmed mudheher m.Ali Hamid Yonis Saleh mohammed H.mohammed Awad E.mohammed marwan A.mahomood Hiba r.mohammed ahmed A.Hassan Adam Harvey North refineries Company Ministry of OilIraq Chemical Engineering Department Tikrit UniversityIraq ministry of Oil Iraq AL-Hawija Technical Institute Northern Technical UniversityMoselIraq School of Engineering Newcastle UniversityUK

To meet the rapidly increasing demand for energy and the dramatic depletion of conventional crude oil,it is imperative to utilize sour *** no coke being produced,oxidative desulfurization(ODS)of naphtha lowers its sulfur content and average molecular *** this article,we outline a method for heavy naphtha non-extractive ODS using a very stable *** technique involves the use of a solid catalyst with oxygen gas as the *** necessitated relatively high mixing intensities;hence a three-phase Oscillatory Baffled reactor(OBr)was *** catalyst was based on the zeolite ZSm-5,prepared from natural kaolin by a series of delamination and activation steps and impregnated with Fe.A TiO2 nanolayer was applied,using the sol-gel method,to prevent rapid *** reactor performance was evaluated to minimize the sulfur content in the naphtha *** to the protective coating,the sulfur conversion stabilized at 90%.The results of this work establish the use of natural clay-based catalysts in a continuous,three-phase ODS,particularly with regard to proving long-term *** also showed that modest ODS can be achieved using an environmentally friendly oxidant,at mild operating conditions,whilst maintaining stability.

关键词： Natural kaoline Desulfurization Three-phase Oscillatory baffled reactor

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The role of Formed microorganism in Sludge on Processing of Wastewater Treatment

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Journal of Life Sciences 2015年第3期9卷 103-110页

作者： ahmed Aidan Al-Hussieny saba Hussein Obeid Noor Nihad Baqer Sajida Frhan Hussain Ayad gheni mohammed ministry of Science and Technology -Directorate of water and Environment Baghdad 100001 Iraq

Several microorganisms such as bacteria, fungi, Protozoa, rotifera, cystic amoeba and algae diagnosed in activated sludge aerobic (rustumiya treatment plant) and anaerobic reactor. results have shown a reduction in the turbidity rates when using activated sludge at rustumiya plant of 76.3 to 2.653 NTU in pre-treatment and final tank respectively, also COD (chemical oxygen demand) amount reduced from 427.263 to 82 mg/L respectively. In addition, concentrations of phosphates and nitrates decreased from 12.083 to 8.426 mg/L and 3.59 to 2.43 mg/L respectively, by removing 30.2% and 32.3% respectively of the final tank. The ratio of ammonia removing was 89.6% for ammonia, reducing process from 1358 to 140 mg/L. Furthermore, sulfates concentration decreased from 30.883 to 23.337 mg/L. However, the system in the anaerobic reactor depends on non-aerated activated sludge. results show turbidity reduced from 12.5 to 2 NTU in pre-treatment and final tank respectively, also the COD mount reduced from 191 to 130 mg/L, the percentage removal of 31.9%. In addition phosphates, nitrates and sulfates concentrations were decreased by using activated sludge from 17.15 to 8.15, 1.2 to 0.1 and 28 to 9.2 mg/L respectively. The ammonia concentration has reduced from 1.2 to 0.1 mg/L where at a removal percentage of 90.9%.

关键词：活性污泥法污水处理过程微生物硫酸盐浓度厌氧反应器氨氮去除化学需氧量反应器系统

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