کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10274829 | 461735 | 2011 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Activity of alumina-silica-supported NiMoS prepared by controlled mixing of alumina into SiO2 hydrogels for HDS of gas oil
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Activity of alumina-silica-supported NiMoS prepared by controlled mixing of alumina into SiO2 hydrogels for HDS of gas oil Activity of alumina-silica-supported NiMoS prepared by controlled mixing of alumina into SiO2 hydrogels for HDS of gas oil](/preview/png/10274829.png)
چکیده انگلیسی
Alumina-silica-supported NiMoS composites were examined in single- and dual-layer catalyst beds in a high-pressure (5 MPa) flow reactor to achieve ultra low sulfur (10 ppm) diesel fuels. Three types of alumina-silica composite supports were prepared by co-precipitation to control the particle size and arrangement of alumina and silica. The SiO2 content was found to be influential on catalytic performance, being best by around 27% regardless of preparation conditions. Alumina crystal size controlled the acidity and surface area of the support, key factors influencing catalytic performance. NiMoASA-2(27), prepared by procedure 2, achieved 4.5 and 3 ppm S at 345 and 360 °C, respectively, in the single bed reactor at a liquid hourly space velocity (LHSV) of 1 hâ 1. NiMoASA-2(27) achieved the best performance of the supports examined in this study. The double-layer catalyst bed contained commercial CoMoS (LX6) and NiMoASA-2(27) in the first and the second beds at 345 and 360 °C, respectively, and achieved 5 and 2 ppm S, indicating better performance at higher temperatures. The reaction order for the hydrodesulfurization (HDS) of refractory sulfur species was close to unity over NiMoASA-2(27), which was significantly higher than that of the commercial CoMoS catalyst. Alumina-silica-supported NiMoS in the second bed of the dual-layer catalyst bed achieved less than 10 ppm S for refractory sulfur species with around 500 ppm S.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel Processing Technology - Volume 92, Issue 5, May 2011, Pages 1012-1018
Journal: Fuel Processing Technology - Volume 92, Issue 5, May 2011, Pages 1012-1018
نویسندگان
Koji Nakano, Weiwei Pang, Jihn-Koo Lee, Joo-Il Park, Seong-Ho, Yoon, Isao Mochida,