Biodiesel production from rice bran by a two-step in-situ process

Rice bran oil (RBO)is claimed to be a potential feedstock for biodiesel production. Non-catalytic in-situ biodiesel production from a low-cost feedstock (rice bran) using subcritical ethanol-water mixture was investigated in this study. The influence of four independent variables, i.e., addition of co-solvent, ethanol concentration, temperature, and time of reactions, on the yield of biodiesel was examined. The results showed that the most effective co-solvent wasethyl acetate and the optimum ethanol concentration, temperature and reaction time were 80% v/v, 200 oC and 3 hours, respectively. The maximum yield of biodiesel was found to be around 80%. The optimization of operating conditions was carried out by response surface methodology (RSM) with historical data design (HDD). The statistical method also suggested similar optimum operating conditions, i.e., 78.44% (v/v) ethanol concentration, 200 oC, and 3.2 hours reaction time with ethyl acetate as a co-solvent. The predicted maximum biodiesel yield was also slightly lower, i.e., 76.98%. Therefore, this study suggests that biodiesel production from rice bran through a non-catalytic in-situ process using a subcritical ethanol-water mixture with ethyl acetate as a co-solvent is very feasible since the yield can reach 80%. The study also found that RSM with HDD can predict the optimum operating conditions with a good accuracy.

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Produksi Biodiesel dari Dedak Padi dengan Metode In-Situ Dua Tahap Menggunakan Katalis Asam Sulfat dan CaO/Hydrotalcite

Jurnal Rekayasa Mesin ◽

10.21776/ub.jrm.2020.011.03.9 ◽

2020 ◽

Vol 11 (3) ◽

pp. 375-382

Author(s):

Yustia Wulandari Mirzayanti ◽

◽

Ayu Alisa ◽

Devita Sari

Keyword(s):

Sulfuric Acid ◽

Rice Bran ◽

Rice Bran Oil ◽

Acid Methyl Ester ◽

Acid Catalyst ◽

Biodiesel Production ◽

Test Results ◽

Oleic Acid Methyl Ester ◽

Two Sides

In this study, biodiesel is made from rice bran vegetable oil. Biodiesel production was carried out by the in-situ method using two-sides using sulfuric acid catalysts and CaO/hydrotalcite. The solvent used was methanol as an oil component in the material and a reactant in the formation of FAME and n-hexane as a solvent to increase the yield of rice bran oil extraction. CaO/hydrotalcite to the yield of biodiesel produced and composition of biodiesel at the highest yield. As much as 50 grams of rice bran was put into a three-neck flask, then 50 ml of n-hexane were added. Next, 1 ml mixture of a sulfuric acid catalyst and 250 ml of methanol were added. Then, the mixture was reacted at 65º. Add stirring to 600 rpm for 90 minutes. Reheating after 90 minutes and a sample of 2.5 grams was taken for FFA testing. Next, the CaO/hydrotalcite catalyst in 10 ml of methanol with a mass variation of 1; 1,5; and 2 grams are added to the reaction flask. The mixture was reacted again at a temperature of 65 ºSuitably stirrings 600 rpm for 90 minutes. Based on the BET test results, the CaO/hydrotalcite catalyst surface area was 200.13 m2/g. The best results obtained on CaO/hydrotalcite catalysts were 2 grams with a biodiesel yield of 9.56%. In the highest biodiesel yield, the FAME component is preferred over the oleic acid methyl ester composition with an area of 35.09% at a retention time of 19.14 min.

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Experimental Investigation and Optimization of Non-Catalytic In-Situ Biodiesel Production from Rice Bran Using with RSM Historical Data Design

International Journal of Renewable Energy Development ◽

10.14710/ijred.0.34138 ◽

2021 ◽

Author(s):

Siti Zullaikah ◽

Ari Krisna Putra ◽

Fathi Haqqani Fachrudin ◽

Rosada Y Naulina ◽

Sri Utami ◽

...

Keyword(s):

Ethyl Acetate ◽

Rice Bran ◽

Historical Data ◽

Ethanol Concentration ◽

Biodiesel Production ◽

Water Mixture ◽

Operation Conditions ◽

Constant Operation ◽

Data Design

Biodiesel has become one of the essential fuels in the present and future, and it can be produced from vegetable oil and animal fat. However, current feedstocks to produce biodiesel slow down the growth of biodiesel implementation due to the high cost of feedstock. As a result, rice bran oil (RBO) is claimed to be a potential feedstock for biodiesel production. A non-catalytic in-situ biodiesel production from low cost feedstock (RBO) using subcritical ethanol-water mixture probably decrease the production cost further and environmentally benign. Therefore, in this work the influence of four independent variables, adding co-solvent/without co-solvent, ethanol concentration, temperature, and time of reactions on the yield of biodiesel was examined tentatively. The independent variables limitations were (a) co-solvent of n-hexane, ethyl acetate and chloroform, (b) ethanol concentration of 20 - 80 %, v/v, (c) temperature of reaction 120 - 200 oC, and (d) time of reaction 1 - 4 h employed to direct the trials. In this examination historical data design was utilized and a quadratic polynomial model was built up and after that at last optimized by using response surface methodology (RSM). It was found that the yield of biodiesel achieved an optimum value of 79.79 %, v/v using ethyl acetate as co-solvent with ethanol concentration of 78.83 % (v/v), under constant operation conditions of P = 8 Mpa, T = 160 oC, t = 2 h, N = 400 rpm, ratio of rice bran (RB): solvent: co-solvent= 10 (g): 80 mL: 20 mL. In the other hand (rice bran 2), it was found that the yield of biodiesel achieved an optimum value of 76.98 % for 3.2 h of reaction time and temperature of reaction 200 oC, under constant operation conditions of P = 8 Mpa, co-solvent = ethyl acetate, ethanol concentration = 80 %, v/v, N = 400 rpm, ratio of RB: solvent: co-solvent= 10 (g): 80 mL: 20 mL. The examination has likewise uncovered that authentic plan information with RSM is a well-organized statistical technique for forecasting the optimum operating conditions of a non-catalytic in-situ biodiesel production from rice bran using subcritical ethanol-water mixture assumes a crucial role of ethanol concentration, types of co-solvent, temperature and time of reactions.

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PRODUKSI BIODIESEL DARI DEDAK PADI SECARA IN SITU DENGAN TEKNOLOGI MICROWAVE

Jurnal Kimia Riset ◽

10.20473/jkr.v4i2.16047 ◽

2019 ◽

Vol 4 (2) ◽

pp. 106

Author(s):

Yulia Tri Rahkadima ◽

Qurrota A'yuni

Keyword(s):

Reaction Time ◽

Rice Bran ◽

Reaction Temperature ◽

Transesterification Reaction ◽

Biodiesel Production ◽

Distillation Process ◽

Flat Bottom ◽

Alkaline Catalyst ◽

Microwave Reactor

AbstrakProses produksi biodiesel dari dedak padi dengan memanfaatkan microwave secara in situ telah berhasil dilakukan. Pengaruh jumlah metanol dan waktu reaksi terhadap kandungan FAMEs dalam produk dipelajari dalam penelitian ini. Dedak padi , metanol dan katalis basa berupa NaOH 0.6 w% dimasukkan ke dalam labu alas datar dilengkapi dengan kondensor dan dimasukkan ke dalam reaktor microwave yang telah dimodifikasi. Produk reaksi yang berupa campuran FAMEs, gliserol, reaktan yang tidak bereaksi dan komponen lainnya kemudian dicuci menggunakan n- heksana dan dilanjut dilakukan proses distilasi. Hasil penelitian menunjukan bahwa dengan menggunakan reaktor microwave, kandungan FAMEs lebih tinggi diperoleh dengan waktu reaksi yang lebih singkat. Gelombang mikro berhasil mempercepat terjadinya reaksi transesterifikasi. Kandungan FAMEs tertinggi yaitu 6.2036 % diperoleh pada waktu reaksi 10 menit, metanol 60 ml dan suhu reaksi 60oC. Kata kunci : Biodiesel, In situ, Microwave, Dedak padi AbstractThe process of biodiesel production from rice bran using in situ microwaves has been successfully carried out. The effect of the amount of methanol and reaction time on the FAMEs content in the product was studied in this study. Rice bran, methanol and alkaline catalyst in the form of 0.6 w% NaOH are put into a flat bottom flask equipped with a condenser and put into a modified microwave reactor. The reaction product in the form of a mixture of FAMEs, glycerol, unreacted reactants and other components is then washed using n-hexane and contuining with the distillation process. The results showed that by using a microwave reactor, a higher FAMEs content was obtained with a shorter reaction time. Microwaves successfully accelerate the transesterification reaction. The highest FAMEs content of 6.2036% was obtained at a reaction time of 10 minutes, methanol 60 ml and reaction temperature 60oC.Keywords: Biodiesel, In situ, Microwave, Rice bran

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