کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
227664 464825 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Production of fatty acid methyl esters over a limestone-derived heterogeneous catalyst in a fixed-bed reactor
ترجمه فارسی عنوان
تولید متیل استرهای اسید چرب بر روی یک کاتالیزور ناهمگن از سنگ آهک در یک رآکتور بستر ثابت
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• Separate reactants feeding into an upward flowing fixed-bed reactor was developed.
• High purity FAME from various oils was successfully produced at 65 °C.
• Increasing catalyst porosity and basicity by HEC addition enhanced the FAME yield.
• Catalyst was principally deactivated by glycerol depositing on the active surface.

Production of fatty acid methyl esters (FAME) via the transesterification of different vegetable oils and methanol with a limestone-derived heterogeneous catalyst was investigated in a fixed-bed reactor at 65 °C and ambient pressure. This heterogeneous catalyst, as a 1 or 2 mm cross-sectional diameter extrudate, was prepared via a wet mixing of thermally treated limestone with Mg and Al compounds as binders and with or without hydroxyethyl cellulose (HEC) as a plasticizer, followed by calcination at 800 °C. The physicochemical properties of the prepared catalysts were characterized by various techniques. Palm kernel oil, palm oil, palm olein oil and waste cooking oil could be used as the feedstocks but the FFA and water content must be limited. The extrudate catalyst prepared with the HEC addition exhibited an enhanced formation of FAME due to an increased porosity and basicity of the catalyst. The FAME yield was increased with the methanol/oil molar ratio. The effect of addition of methyl esters as co-solvents on the FAME production was investigated. The structural and compositional change of the catalysts spent in different reaction conditions indicated that deactivation was mainly due to a deposition of glycerol and FFA (if present). The FAME yield of 94.1 wt.% was stably achieved over 1500 min by using the present fixed-bed system.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Industrial and Engineering Chemistry - Volume 20, Issue 4, 25 July 2014, Pages 1665–1671
نویسندگان
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