IJE TRANSACTIONS C: Aspects Vol. 29, No. 12 (December 2016) 1635-1641    Article in Press

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H. Hadiyanto, W. Widayat and A. Duma
( Received: June 10, 2016 – Accepted in Revised Form: November 11, 2016 )

Abstract    Since the conventional esterification method requires longer processing time and obtain low yield, the intensification of this process is still interesting subject to be investigated. To reduce the oil extraction cost from seeds which almost 70% of total processing cost, in situ esterification has been recently introduced. The objective of study was to produce biodiesel from rubber seeds oil through in situ esterification and assisted by ultrasound irradiation. The experiment was carried out in two stages of catalyst additions: H2SO4 (varied from 0.1-1% v/v) and NaOH (0.1%) and the esterification had been conducted at 60oC for 30 minutes. The results showed that the optimum yield of fatty acid methyl ester (FAME) was 35% with variable of rubber seed ratio to methanol 1:1.75 (w/v), catalyst H2SO4 1% and catalyst KOH 0.1%.


Keywords    Biodiesel, rubber seeds, in situ, (trans)esterification, Fatty Acid Methyl Ester (FAME), Ultrasonic


چکیده    از آنجا که روش استریفیکاسیون معمولی نیاز به زمان فرآوری طولانی داشته و بازده پایینی دارد، بهبود این فرایند هنوز هم یک موضوع جالب است که باید بررسی شود. به منظور کاهش هزینه استخراج روغن از دانه که تقریبا 70٪ از هزینه کل فرایند را شامل می‌شود، فرایند استریفیکاسیون درجا اخیرا معرفی شده است. هدف از این مطالعه تولید بیودیزل از روغن دانه لاستیک از طریق استریفیکاسیون در محل، باکمک امواج فراصوت در 42 کیلو هرتز به مدت 30 دقیقه بود. آزمایش در دو مرحله افزودن کاتالیزور انجام شد: اسید سولفوریک ( با غلظت 1/0-1% حجمی/حجمی) و سود (1/0%) و استریفیکاسیون در 60 درجه سانتیگراد به مدت 30 دقیقه تحت فرکانس صوت 42 کیلو هرتز انجام شد. نتایج نشان داد که بازده بهینه اسید چرب متیل استر (FAME) 35% بود که متناظر با بازده بیودیزل 5/92% بوده که تحت شرایط نسبت دانه لاستیک به متانول 1: 75/1 (وزنی/حجمی)، بارگذاری کاتالیزور H2SO4 (1%) و بارگذاری KOH کاتالیزور (1/0%) حاصل شد.


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