A Novel SPES/PES Catalytic Membrane for Production Biodiesel: Optimization by Central Composite Design

2014 ◽  
Vol 628 ◽  
pp. 338-341
Author(s):  
Wen Ying Shi ◽  
Hong Bin Li ◽  
Rong Zhou
Keyword(s):  
Response Surface Methodology ◽  
Oleic Acid ◽  
Reaction Time ◽  
Central Composite Design ◽  
Acid Methyl Ester ◽  
Catalytic Membrane ◽  
Mass Ratio ◽  
Acid Methyl ◽  
Sulfonated Polyethersulfone ◽  
Central Composite

A sulfonated polyethersulfone (SPES)/polyethersulfone (PES) blend catalytic membrane was prepared and used as a heterogeneous catalyst in the esterification of oleic acid with methanol for producing biodiesel. Response surface methodology (RSM) based on central composite design (CCD) was used to optimize the three important reaction variables methanol/oleic acid mass ratio, catalytic membrane loading and reaction time for the esterification by SPES/PES blend catalytic membrane. The optimum condition for the esterification was as follows: methanol/oleic acid mass ratio 1:1, catalytic membrane loading 1.66 meq/g, reaction time 6 h. The optimum predicted fatty acid methyl ester (FAME) yield was 97.44% and the actual value was 98.64%. The above results shows that the RSM study based on CCD is adaptable for FAME yield studied for the current esterification system.

scholarly journals Optimasi Proses Blansir terhadap Warna dan Vitamin C pada Pengeringan Cabai Merah Keriting (Capsicum annuum L) dengan Tunnel Dehidrator

2019 ◽  
Vol 2 (3) ◽  
pp. 48
Author(s):  
Hisworo Ramdani ◽  
Reki Wicaksono Ashadi ◽  
Narjisul Ummah
Keyword(s):  
Response Surface Methodology ◽  
Reaction Time ◽  
Vitamin C ◽  
Central Composite Design ◽  
Water Content ◽  
Response Surface ◽  
Research Data ◽  
Optimum Temperature ◽  
Multiple Variable ◽  
Central Composite

This study aims to get the maximum uptake condition to produce the best vitamin C, color, and water content that was desired. The analysis used in this study uses the Central Composite Design from Response Surface Methodology (RSM). RSM was a tool that can calculate the optimum value of the factors given based on research data or better known as Multiple Variable Functions (FPG). The temperature and blast time as a research experimental factor of the desired response are color and vitamin C. The color optimization results showed Y = 17.276 - 0.945x1 + 1.787x2 - 1.638x12 - 2.619x22 + 0.934x1x2 and produce maximum color at optimum temperature and reaction time 85.46 (86 ± 0.5) oC and 12 minutes. The optimization results of vitamin C showed Y = 12.144 + 1.834x1 + 0.117x2 + 1.441x12 - 1.052x22 - 1.540x1x2 and produce maximum vitamin C at optimum temperature and reaction time 98.11 (98 ± 0.5) oC and 5 minutes. The results of the validation at the above temperature produce a color of 17.4 and vitamin C 15.2 mg / 100 g.Keywords: blanch, chili, drying, optimization, RSM

Lipid Deposition on Silicone Hydrogel Lenses, Part I: Quantification of Oleic Acid, Oleic Acid Methyl Ester, and Cholesterol

2006 ◽  
Vol 32 (6) ◽  
pp. 300-307 ◽  
Author(s):  
E Peter Maziarz ◽  
Mark J. Stachowski ◽  
X Michael Liu ◽  
Linda Mosack ◽  
Ann Davis ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Methyl Ester ◽  
Acid Methyl Ester ◽  
Lipid Deposition ◽  
Silicone Hydrogel ◽  
Acid Methyl ◽  
Oleic Acid Methyl Ester

scholarly journals Optimization of Eugenol Extraction from Clove Oil using Response Surface Methodology

2015 ◽  
Vol 9 (11) ◽  
pp. 68
Author(s):  
Widayat Widayat ◽  
Hadiyanto Hadiyanto ◽  
Bambang Cahyono ◽  
Ngadiwiyana Ngadiwiyana
Keyword(s):  
Response Surface Methodology ◽  
Optimum Condition ◽  
Central Composite Design ◽  
Response Surface ◽  
Design Method ◽  
Main Process ◽  
Clove Oil ◽  
Design Variables ◽  
Central Composite

The objective of this research was to obtain optimum condition of eugenol production from clove oil using a central composite design method. The main process occured in the eugenol production was saphonification and neutralization processes. In order to optimize these processes, the ratio of NaOH/clove oil and temperature were studied as design variables i.e. ratio of NaOH/clove oil=1:2.5-1:3.5 while temperature was varied between 40 and 60oC. The yield of eugenol was considered as the main response in of this experiment. The result showed that the optimum condition was achieved when the temperature and the ratio of NaOH/clove oil were 50oC and 2.75:1, respectively and the yield was 39.17%.<br />

scholarly journals Pembuatan Biodiesel dari Minyak Sawit Off-Grade Menggunakan Katalis CaO Melalui Proses Dua Tahap

2015 ◽  
Vol 10 (3) ◽  
Author(s):  
Febrina Dwi Putri ◽  
Zuchra Helwani ◽  
Drastinawati Drastinawati
Keyword(s):  
Response Surface Methodology ◽  
Central Composite Design ◽  
Response Surface ◽  
Central Composite

Biodiesel merupakan sumber bahan bakar alternatif yang bisa dihasilkan dari minyak nabati melalui transesterifikasi dengan metanol. Sawit Off-grade merupakan salah satu sumber minyak nabati yang mempunyai potensi untuk digunakan sebagai bahan dasar produksi biodiesel. Reaksi transesterifikasi dilangsungkan dengan bantuan katalis CaO dari cangkang telur yang dikalsinasi pada suhu 900ºC selama 2 jam. Tujuan dari penelitian ini adalah untuk memproduksi biodiesel dari minyak sawit off-grade melalui reaksi dua-tahap, melihat performa katalis Cao terhadap reaksi transesterifikasi, serta mempelajari pengaruh temperatur reaksi, rasio mol minyak:metanol dan konsentrasi katalis terhadap yield biodiesel pada reaksi transesterifikasi. Esterifikasi dilakukan pada suhu 60°C dengan perbandingan mol minyak:metanol 1:12 menggunakan 1%wt katalis H2SO4. Asam lemak bebas (ALB) tereduksi dari 16,18% menjadi 0,6%. Reaksi transesterifikasi dilakukan dengan variasi perbandingan mol minyak:metanol 1:7, 1:9, 1:11, konsentrasi katalis 2%wt, 4%wt, 6%wt, serta suhu reaksi pada 50ºC, 60ºC, 70ºC selama 2 jam. Data yang diperoleh diproses dengan menggunakan response surface methodology (RSM), sedangkan jumlah eksperimen ditentukan dengan central composite design (CCD). Yield yang diperoleh pada penelitian ini yaitu sebanyak 62,30%-87,41%. Yield optimum dihasilkan pada reaksi dengan suhu 70ºC menggunakan minyak:metanol dengan perbandingan 1:11 dan katalis CaO 2%wt. Kondisi proses yang berpengaruh terhadap yield biodiesel adalah suhu reaksi, perbandingan mol minyak:metanol, serta interaksi antara suhu dengan perbandingan mol minyak:metanol. Akan tetapi tidak ditemukan adanya pengaruh signifikan konsentrasi katalis terhadap yield biodiesel.

scholarly journals OPTIMASI TEKSTUR BUAH TOMAT SETELAH SIMULASI TRANSPORTASI MENGGUNAKAN RESPON SURFACE METODOLOGY (RSM)

2019 ◽  
Vol 7 (2) ◽  
pp. 139-147
Author(s):  
Ida Ayu Widhiantari ◽  
Sandra Sandra ◽  
Gunomo Djoyowasito
Keyword(s):  
Response Surface Methodology ◽  
Central Composite Design ◽  
Response Surface ◽  
Central Composite

Selama kegiatan transportasi buah tomat dapat mengalami kerusakan akibat adanya frekuensi getaran yang berasal dari mesin transportasi dan juga lama waktu kegiatan transportasi. Adanya getaran selama proses transportasi buah tomat dapat mempengaruhi perubahan tekstur buah tomat. Optimasi dilakukan dalam penelitian ini dengan tujuan untuk memperoleh mutu buah tomat yang optimal setelah dilakukan simulasi transportasi. Optimasi dilakukan dengan menggunakan Response Surface Methodology (RSM) central composite design (CCD) dengan dua variabel bebas yaitu frekuensi getaran (3 Hz, 6HZ, dan 9Hz) dan lama waktu penggetaran (120, 150, dan 180 menit) serta tekstur buah tomat sebagai respon. Kondisi optimum diperoleh pada frekuensi getaran  2,33 Hz dan waktu simulasi transportasi 133,42 menit dengan nilai tekstur optimum buah tomat yaitu 0,147768 dengan nilai desirability sebesar 0,928.    

scholarly journals Optimization of Pectin Extraction from Nephrolepis biserrata Leaves Using Response Surface Methodology

2014 ◽  
Vol 625 ◽  
pp. 920-923 ◽  
Author(s):  
Halifah Pagarra ◽  
Roshanida Abd Rahman ◽  
Rosli Md. Illias ◽  
Nor Azah Ramli
Keyword(s):  
Response Surface Methodology ◽  
Optimum Condition ◽  
Central Composite Design ◽  
Galacturonic Acid ◽  
Dry Weight ◽  
Extraction Time ◽  
Extraction Condition ◽  
Degree Of Esterification ◽  
Independent Variables ◽  
Central Composite

A central composite design was employed to optimize the extraction of pectin from Nephrolepis biserrata leaves. The independent variables were pH (1.5 to 2.5), extraction time (60 to 120 minutes) and temperature (60oC to 100oC). The combined effect of these variables on yields of pectin was investigated. The results showed that the yield of extracted pectin ranged from 3.76% to 8.50% (w/w, based on dry weight of Nephrolepis biserrata leaves). The optimum condition for the yield of pectin extraction was predicted at pH (1.5), extraction time (76.25 minutes) and temperature (100oC). Under the optimum condition, the actual pectin yield was 8.18%, which was below the predicted extraction condition of 8.316 %. The characteristics were 47.52% galacturonic acid and 83.71% degree of esterification. Keyword: Nephrolepis biserrata leaves, Extraction, Pectin, RSM, Characterization.

Sign in / Sign up

Export Citation Format

Share Document