Preparation of KF/CaO nanocatalyst and its application in biodiesel production from Chinese tallow seed oil

Lei, Wen; Wang, Yun; Lu, Doukun; Hu, Shengyang; Han, Heyou

doi:10.1016/j.fuel.2010.01.028

Cited by 245 publications

(99 citation statements)

References 23 publications

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“…In comparison CaO and MgO based catalysts showed a high number of reuse potentiality as above 16 uses with Ca/Ce oxide [74]. Mixed KF/CaO could be a very attractive heterogeneous catalyst with repeatability for 16 cycles to achieve biodiesel yield 97% -91% [82]. Hu et al [26] …”

Section: Discussionmentioning

confidence: 96%

“…A relatively small 5% loss of activity was observed by Boz et al [81] at the end of third reuse of the KF (40%)/bentonite catalyst when the catalyst was washed several times with methanol, and re-calcined at 773 K for 3 h. The prepared KF/CaO [82] can be reused for 16 times with no apparent loss of activity in batch process. And this deactivated catalyst can be regenerated just by calcination in air.…”

Section: Supported Cao and Mgo Catalystsmentioning

confidence: 87%

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Deactivation Processes, Regeneration Conditions and Reusability Performance of CaO or MgO Based Catalysts Used for Biodiesel Production—A Review

Oueda¹,

Bonzi-Coulibaly²,

Ouédraogo³

2017

MSA

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The activity of a catalyst in transestrification reaction usually declines with repeated uses and this limits the possibility to use it many times. This paper presents a review of various techniques used to evaluate the activity changes, the recycling processes for calcium and magnesium oxides based heterogeneous catalysts for biodiesel production. The activity of calcium and magnesium oxides based catalysts declines due to leaching, surface or active sites poisoning by reactant or product molecules and modification of physical aspects. Physico-chemical methods (AAS, BET, CO 2 -TPD, EDS, FTIR, ICP-AES, SEM, TG/DTA and XRD) were used to check the catalyst modification and to confirm the deactivation. When separated from the reaction mixture by filtration, the catalyst could be reused without any treatment or recycled by washing, drying or/and recalcination. Between various recycling processes for calcium and magnesium oxides based catalysts, mixed oxides showed less leaching and performed FAME or FAEE yield >90% with reusability.

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Section: Discussionmentioning

confidence: 96%

Section: Supported Cao and Mgo Catalystsmentioning

confidence: 87%

Deactivation Processes, Regeneration Conditions and Reusability Performance of CaO or MgO Based Catalysts Used for Biodiesel Production—A Review

Oueda¹,

Bonzi-Coulibaly²,

Ouédraogo³

2017

MSA

View full text Add to dashboard Cite

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“…Nanometer magnetic base solid catalyst was proposed as an efficient catalyst for biodiesel production because of its easy separation which led to a reduction in operating costs . Wen et al (2010) reported the preparation of KF/CaO solid basic nanocatalyst for Chinese tallow seed oil. Optimal conditions for obtaining a 96.8% yield was a 12:1 molar ratio of alcohol to oil, 4wt.…”

Section: Nanocatalysts For Biodiesel Productionmentioning

confidence: 99%

A review on conversion of biomass to biofuel by nanocatalysts

Akia¹,

Yazdani²,

Motaee³

et al. 2014

Biofuel Res. J.

231

101

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HIGHLIGHTSSignificant improvements in biomass conversion using nanocatalysts. Feasibility of utilization milder operating conditions by using nanocatalysts compared to the bulk catalysts. The role of nanocatalysts to overcome some challenges in biomass conversion, improving the products quality. GRAPHICAL ABSTRACTProducts from nanocatalytic conversion of biomass The world's increasing demand for energy has led to an increase in fossil fuel consumption. However this source of energy is limited and is accompanied with pollution problems. The availability and wide diversity of biomass resources have made them an attractive and promising source of energy. The conversion of biomass to biofuel has resulted in the production of liquid and gaseous fuels that can be used for different means methods such as thermochemical and biological processes. Thermochemical processes as a major conversion route which include gasification and direct liquefaction are applied to convert biomass to more useful biofuel. Catalytic processes are increasingly applied in biofuel development. Nanocatalysts play an important role in improving product quality and achieving optimal operating conditions. Nanocatalysts with a high specific surface area and high catalytic activity may solve the most common problems of heterogeneous catalysts such as mass transfer resistance, time consumption, fast deactivation and inefficiency. In this regard attempts to develop new types of nanocatalysts have been increased. Among the different biofuels produced from biomass, biodiesel has attained a great deal of attention. Nanocatalytic conversion of biomass to biodiesel has been reported using different edible and nonedible feedstock. In most research studies, the application of nanocatalysts improves yield efficiency at relatively milder operating conditions compared to the bulk catalysts. ARTICLE INFO ABSTRACT

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“…In the second group, further investigations have been performed due to good accessibility and high activity in moderate reaction conditions. Alkali earth metal oxide and methoxide and mixture of them, especially calcium oxide, are reported as active catalysts (Veljković et al 2009;Kawashima et al 2008;Sun et al 2010;Liu et al 2007;Wen et al 2010;Liu et al 2008aLiu et al , 2008bZabeti et al 2009b;Fraile et al 2009;Guo et al 2010). In most cases, laboratory grade or synthesized CaO, which is expensive, with or without support has been used as catalyst to transesterify the virgin edible oil to biodiesel, and high yield has been achieved (Liu et al 2008b;Kouzu et al 2008Kouzu et al , 2009Albuquerque et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Utilization of constructional lime as heterogeneous catalyst in biodiesel production from waste frying oil

Ghanei

Moradi

Heydarinasab

et al. 2013

Int. J. Environ. Sci. Technol.

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Waste frying oil as valueless material which is disposed to environment can be used as a promising feedstock to produce biodiesel. In this study, constructional lime was used as alkaline heterogeneous catalyst for biodiesel production from virgin and waste frying oil. After determining the best activation temperature for the catalyst (600°C), transesterification reactions were carried out at 65°C, MeOH to oil molar ratio of 12:1, and 1 wt% of activated constructional lime under vigorous mixing for 5 h. Yield of reactions for virgin and waste frying oil (2.17 % free fatty acid) and pretreated waste frying oil (0.918 % free fatty acid) were 87, 93.9, and 94 %, respectively. Transesterification of virgin frying oil and pretreated waste frying oil were done at 65°C, MeOH to oil molar ratio of 6:1, and 1 wt% of KOH as catalyst under vigorous mixing for 2 h, for comparison. Yield of the reaction was 98.6 and 95.1 %, respectively. Therefore, when constructional lime is used as catalyst pretreatment of waste oil is not necessary.

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Preparation of KF/CaO nanocatalyst and its application in biodiesel production from Chinese tallow seed oil

Cited by 245 publications

References 23 publications

Deactivation Processes, Regeneration Conditions and Reusability Performance of CaO or MgO Based Catalysts Used for Biodiesel Production—A Review

Deactivation Processes, Regeneration Conditions and Reusability Performance of CaO or MgO Based Catalysts Used for Biodiesel Production—A Review

A review on conversion of biomass to biofuel by nanocatalysts

Utilization of constructional lime as heterogeneous catalyst in biodiesel production from waste frying oil

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