کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4768659 1424960 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Full Length ArticleImprovement of hydrodeoxygenation stability of nickel phosphide based catalysts by silica modification as structural promoter
ترجمه فارسی عنوان
طول کامل ماده بهبود پایداری هیدروژی اکسیدان شدن کاتالیزورهای مبتنی بر فسفات نیکل توسط اصلاح سیلیس به عنوان پروموتر ساختاری
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


- SiO2 added to Ni2P based catalysts as structural promoter.
- Life of catalyst with modification was prolonged to three times of the unmodified one.
- SiO2 retarded the transformation of the active phase Ni2P.
- Carbon deposition originating from metallic nickel was reduced with SiO2 addition.

This study proposed a novel and facile approach to promote the stability of nickel phosphide (Ni2P) based catalysts by adding silica (SiO2) as structural promoter under hydrothermal condition. Catalytic hydrodeoxygenation (HDO) of triglyceride using soybean oil as model feed over Ni2P and palladium supported on α-Al2O3 (Ni2PPd/α-Al2O3) with and without SiO2 addition was conducted. With SiO2 modification, the catalyst was stable for 144 h which is three times of that from the unmodified one, while higher than 99.0 wt.% conversion was achieved with green diesel (i.e., C15-18 alkane) as the main products. H2-TPD, NH3-TPD, and XRD over fresh catalysts proved that SiO2 addition exhibited no distinguished effect on hydrogen chemisorption ability and active phase. XRD, TEM, XPS, EDX, XRF, H2-TPR, N2 physisorption, and TG/IR over fresh or/and spent catalysts demonstrated that SiO2 was a structural stability promoter (spacer), hindering the transformation of the active phase Ni2P. Furthermore, carbon deposition during the HDO process due to exist of metallic nickel was reduced with SiO2 addition. This work demonstrated that Ni2P supported on α-Al2O3 modified by SiO2 (Ni2PPd-SiO2/α-Al2O3) was a promising catalyst for the hydrodeoxygenation (HDO) of triglyceride to produce green diesel. With further work, it may lead to a catalyst capable for HDO in industry.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 204, 15 September 2017, Pages 144-151
نویسندگان
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