Methanolysis Optimization of Cottonseed Oil to Biodiesel Using Heterogeneous Catalysts

被引:13
作者
Nonso, Ude Callistus [1 ]
Dominic, Onukwuli Okechukwu [2 ]
Ifeanyi, Ugwu Boniface [1 ]
Faith, Okey-Onyesolu Chinenye [2 ]
Amaechi, Ezidinma Timothy [3 ]
Madus, Ejikeme Paul [4 ]
机构
[1] Michael Okpara Univ Agr, Dept Chem Engn, Umudike, Umuahia, Nigeria
[2] Nnamdi Azikiwe Univ NAU, Dept Chem Engn, Awka, Nigeria
[3] Inst Management & Technol IMT, Dept Chem Engn, Enugu, Nigeria
[4] Univ Nigeria, Dept Pure & Ind Chem, Nsukka, Nigeria
来源
IRANIAN JOURNAL OF CHEMISTRY & CHEMICAL ENGINEERING-INTERNATIONAL ENGLISH EDITION | 2020年 / 39卷 / 04期
关键词
Refined cottonseed oil; Saw dust ash; Free fatty acid methyl ester; Response surface methodology; Central composite design; Heterogeneous catalysts; SOYBEAN OIL; SEED OIL; PALM OIL; TRANSESTERIFICATION; ASH; SUNFLOWER; EXTRACTION; CONVERSION;
D O I
10.30492/IJCCE.2020.43368
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
This paper presented the process optimization for heterogeneous catalysts transesterification of refined cottonseed oil catalyzed by calcium oxide (CaO) and magnesium oxide (MgO) impregnated on Saw Dust Ash (SDA) using Response Surface Methodology Central Composite Design (RSMCCD). The five transesterification process variables studied were: catalyst concentration (4-8 wt% oil), methanol/oil molar ratio (4:1-8:1), reaction temperature (45-85 degrees C), reaction time (3-5h), and agitation speed (200-300rpm). It was revealed that the reaction temperature gave the most significant effect on the yield of Fatty Acid Methyl Ester (FAME), followed by methanol/oil molar ratio. There were also significant interaction effects between catalyst concentration and methanol/oil molar ratio, catalyst concentration and agitation speed, methanol/oil molar ratio and reaction temperature, methanol/oil molar ratio and reaction time, methanol/oil molar ratio and agitation speed, reaction time and agitation speed for CaO/SDA transesterified reaction while for MgO/SDA transesterified reaction the significant interaction effect between variable is methanol/oil molar ratio and reaction time. Based on the optimized conditions, the highest yield of 90% for CaO/SDA transesterified reaction and 77% for MgO/SDA transesterified reaction were predicted using the following variables catalyst concentration, CaO/SDA = 6wt% and MgO/SDA = 8wt%, methanol/oil molar ratio = 6:1(CaO/SDA) and 8:1 (MgO/SDA), reaction temperature = 65 degrees C, reaction time = 4h and agitation speed = 250rpm. Experimental validation of the predicted optimum conditions gave an actual yield of 86% (CaO/SDA) and 73.3% (MgO/SDA). The small errors between the predicted and actual optimum yield (4.7% (CaO/SDA) and 5.2% (MgO/SDA)) indicated that the model were valid and accurate in representing the actual experimental values and also in predicting yield at any conditions within the range studied. The results proved the efficacy of saw dust ash impregnated with CaO and MgO in transesterification reaction.
引用
收藏
页码:355 / 370
页数:16
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