کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
588179 1453338 2016 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Reactive extraction of castor seeds and storage stability characteristics of produced biodiesel
ترجمه فارسی عنوان
استخراج واکنشگر از دانه های کرچک و ویژگی های ثبات ذخیره سازی بیودیزل تولید
کلمات کلیدی
استخراج واکنشی؛ سود؛ بیودیزل روغن کرچک؛ ثبات ذخیره سازی؛ دانه کرچک؛ اسید چرب آزاد
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بهداشت و امنیت شیمی
چکیده انگلیسی


• Reactive extraction of castor seeds was investigated using NaOH catalyst.
• Highest biodiesel conversion of 92.43% was obtained with NaOH compared to KOH (72.3%).
• Storage stability study suggested that biodiesel stored in a dark condition is stable.

In the present study, oil was extracted from a single castor seed by eppendorf vial method, and the oil yield was compared with the yield obtained from Soxhlet method. The oil yield from both methods was about 55% and comparable. Free Fatty Acid (FFA) content of extracted castor oil was found to be lower (<1 mg KOH/g oil). Therefore, single step transesterification (reactive extraction) was carried out to study the effect of various reaction variables on the conversion of castor oil biodiesel. The optimum biodiesel conversion of ∼93% was achieved under following conditions: 4 h, 1:250 oil to MeOH molar ratio, 1 wt.% NaOH, 40 °C, 0.75 mm particle size, 20 g seed, 600 rpm and 10 (vol.%) co-solvent. The estimated fuel properties of biodiesel obtained with NaOH, KOH and NaOH (with co-solvent) were found to be similar and within the limits of ASTM standards. Similarly, storage stability of prepared biodiesel was evaluated over a six-month storage period (180 days) under three different storage conditions. The results showed a sharp decrease in fuel stability over time in terms of increase in density from 0.878 to 0.984 g/cm3, kinematic viscosity (10.59–16.18 cSt), acid value (0.52–5.15 mg KOH/g) respectively. While, iodine value significantly decreased from 82.5 to 54.57 g I2/100 g oil over time. Biodiesel sample stored in the open air degraded faster than samples stored in other storage conditions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Process Safety and Environmental Protection - Volume 100, March 2016, Pages 252–263
نویسندگان
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