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The role of ZnO in reactive desulfurization of diesel over ZnO@Zeolite Y: Classification, preparation, and evaluation
Separation and Purification Technology ( IF 8.1 ) Pub Date : 2020-09-25 , DOI: 10.1016/j.seppur.2020.117784
Yu YANG , Samira Mandizadeh , Hao ZHANG , Masoud Salavati-Niasari

A series of metal oxides (CuO, ZnO, CeO2)-modified zeolite Y nanocomposites were successfully synthesized via procedure comprising (i) ion-exchange (ii) precipitation and (iii) calcination method. Structural analysis of the products confirmed the nanoscale formation of nanocomposites. This study focused on hydrodesulfurization (HDS) of crude oil fraction (isodiesel) in a single reactor loaded with nanocomposites of metal oxide with high specific area and high reactivity under various operating factors such as temperature (350–390 °C), pressure (1–4 MPa), catalyst dosage (0.7–1.3 g) and weight hour space velocity (1–2 h−1) to achieve high quality of diesel. Nanocomposites could efficiently reduce sulfur compound concentration from 2000 ppm to less than 10 ppm according Euro-5 standard. High levels of sulfur compounds (98%) were removed using ZnO-zeolite Y nanocomposite under determined conditions (1 g catalyst, H2/oil mole ratio = 500, LHSV = 1 h−1, temperature = 370 °C). We could recycle ZnO-zeolite Y, 5 times without a significant decrease in catalyst activity that is useful for industrial application. Furthermore, Power Low model confirms that the HDS reaction is irreversible in fixed-bed reactor.



中文翻译:

ZnO在ZnO @ Zeolite Y上柴油反应性脱硫中的作用:分类,制备和评估

通过包括(i)离子交换(ii)沉淀和(iii)煅烧方法的程序成功地合成了一系列金属氧化物(CuO,ZnO,CeO 2)改性的沸石Y纳米复合材料。产品的结构分析证实了纳米复合材料的纳米级形成。这项研究的重点是在单个反应器中对原油馏分(异柴油)进行加氢脱硫(HDS),该反应器在各种操作因素(例如温度(350–390°C),压力(1 –4 MPa),催化剂用量(0.7–1.3 g)和重时空速(1-2 h -1)以达到高质量的柴油。根据欧5标准,纳米复合材料可以有效地将硫化合物浓度从2000 ppm降至10 ppm以下。在确定的条件下(1 g催化剂,H 2 /油摩尔比= 500,LHSV = 1 h -1,温度= 370°C),使用ZnO-沸石Y纳米复合材料去除了高含量的硫化合物(98%)。我们可以将ZnO沸石Y循环使用5次,而不会显着降低可用于工业应用的催化剂活性。此外,低功率模型证实了HDS反应在固定床反应器中是不可逆的。

更新日期:2020-09-29
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