Biodliesel Production from Soybean Oil Using Calcium Oxide as a Heterogeneous Catalyst

Kouzu, Masato; Umemoto, Mitsumasa; Kasuno, Takekazu; Tajika, Masahiko; Aihara, Yoichi; Sugimoto, Yoshikazu; Hidaka, Jusuke

doi:10.3775/jie.85.135

Cited by 38 publications

(13 citation statements)

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“…It was found that under the optimum conditions for catalyst calcination, i.e., a temperature of 900°C, reaction temperature of 70°C, reaction time of 2.5 h, catalyst loading of 1.5 %, and a methanol/oil molar ratio of 9, the oil conversion was 93 %. However, a different study [4] concluded that using calcium oxide calcined in air only resulted in a 10 % methyl ester yield after 4 h. The catalyst samples were prepared by calcination of the precipitated calcium carbonate at 900°C in the prescribed atmosphere, an ambient air or helium gas flow. Calcination in a helium gas flow markedly intensified the activity of calcium oxide yielding acceptable ester yields in 2 h.…”

Section: Biodiesel Production Using Solid Catalystsmentioning

confidence: 99%

Reaction Kinetics of Soybean Oil Transesterification Using Heterogeneous Metal Oxide Catalysts

2007

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Homogeneous acid or base catalysts dissolve fully in the glycerol layer and partially in the fatty acid methyl ester (biodiesel) layer in the triglyceride transesterification process. Heterogeneous (solid) catalysts, on the other hand, can prevent catalyst contamination making product separation much simpler. In the present work, the transesterification kinetics of five different solid catalysts with soybean oil is presented. It is found that heterogeneous catalysts require much higher temperatures and pressures to achieve acceptable conversion levels compared to homogeneous catalysts. Subsequent to preliminary investigations, transesterifications were conducted for selected high performance solid catalysts, i.e., MgO, CaO, BaO, PbO, and MnO 2 in a high pressure reactor up to a temperature of 215°C. The yield of the fatty acid methyl esters and the kinetics (rate constant and order) of the reaction are estimated and are compared for each catalyst.

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Section: Biodiesel Production Using Solid Catalystsmentioning

confidence: 99%

Reaction Kinetics of Soybean Oil Transesterification Using Heterogeneous Metal Oxide Catalysts

2007

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“…It is considered that some content of freeCaO in LD slag has already changed to Ca(OH) 2 and CaCO 3 , which do not have a catalytic effect on the transesterification. The heat treatment of LD slag will increase the content of CaO by the decomposition reactions of Ca(OH) 2 and CaCO 3 .…”

Section: Discussionmentioning

confidence: 99%

“…[2][3][4] However, the improvement of surface basicity of CaO is an important problem to overcome due to the fairly low reactivity of the CaO surface in comparison with the liquid catalyst of alkali hydroxide. In another series of the present experiment, modification of the CaO catalyst was performed and the optimum conditions of the treatment of CaO containing materials and the transesterification of fatty acid were obtained.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Effect of Slags on the Formation of Bio-diesel Fuel

et al. 2007

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“…Using high methanol-to-oil ratios caesium-exchanged NaX faujasites have been found to be active [17]. A number of possible heterogeneous base catalysts have been investigated for the transesterification of triglycerides including alkaline earth metal catalyst such as MgO [18][19][20][21], Ba(OH) 2 [13], CaO [13,22] as well as Ca(OH) 2 [13], zeolites [17,23], mixed oxides of zinc and aluminium [24], Na/NaOH/c-Al 2 O 3 [14] and KF/ZnO [25]. Recently, Li-doped CaO [26] and Li-doped MgO [27,28] have been studied in detail for the transesterification of tributylglyceride as a model reagent.…”

Section: Introductionmentioning

confidence: 98%

Mgo Catalysed Triglyceride Transesterification for Biodiesel Synthesis

Enache

Lloyd

et al. 2010

Catal Lett

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A series of MgO catalysts have been prepared by calcination of (MgCO 3 ) 4 ÁMg(OH) 2 and these have been found to be effective for the transesterification of triglycerides with methanol at 200°C. The calcination temperature controls the surface area, porosity and the surface structure and we observe that the optimal calcination temperature is in the range 550-700°C as this provides a balance between high surface area, and hence high concentration of active sites, and the pore structure which permits access of the reactants. Using appropriate conditions conversions in excess of 98% could be obtained.

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Biodliesel Production from Soybean Oil Using Calcium Oxide as a Heterogeneous Catalyst

Cited by 38 publications

References 0 publications

Reaction Kinetics of Soybean Oil Transesterification Using Heterogeneous Metal Oxide Catalysts

Reaction Kinetics of Soybean Oil Transesterification Using Heterogeneous Metal Oxide Catalysts

Catalytic Effect of Slags on the Formation of Bio-diesel Fuel

Mgo Catalysed Triglyceride Transesterification for Biodiesel Synthesis

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