Catalytic Properties of Lithium-Doped ZnO Catalysts Used for Biodiesel Preparations

Xie, Wenlei; Yang, Zenan; Hong, Chun Pyo

doi:10.1021/ie070597s

Cited by 97 publications

(44 citation statements)

References 38 publications

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“…However, doping the LiZnO to the grain in 1:10 (mass ratio) decreased the heat resistance, and the main peak of decomposition was observed at a lower temperature than 26.6°C for cereal grains. These results confirm the observations forwarded by Xie et al [1] for ZnO systems with added Li atoms.…”

Section: State Of Preexisting and Initial Research Indicating The Feasupporting

confidence: 92%

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Synthesis, characterization, and catalytic properties of the Li-doped ZnO

Kulawik

Żarska

Folentarska

et al. 2018

J Therm Anal Calorim

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In this study, attention was directed at the interactions between Li-doped ZnO systems and rye cereal. The interaction of cereal grains and straws with the transition metal ions is of biochemical importance primarily due to the presence of those complexes in biological systems. Metal/cereal chemistry plays a crucial role in the cross-linking of various biomolecules, and formed systems seem to be promising for various applications, such as material for the production of carbonizate and gaseous substances, which allows for the preparation of second generation biofuels. In the study of cereal/metal complexes, thermogravimetric measurements were performed in order to explain the influence of ZnO and Li 2x Zn 1-x O oxides on the thermal decomposition of rye grains in relation to their application for biofuel production. The possibility of generation of volatile products and carbonizate was considered. The characterization of carbonizate and volatile products was made. The catalytic properties of Li 2x Zn 1-x O phases in the decomposition of cereal grains were confirmed through thermal analysis. The thermal degradation of rye grains was catalyzed by Li-doped ZnO systems. Superior degradation to volatile products depended upon both the botanical origin of the cereal and the catalyzing system.

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Section: State Of Preexisting and Initial Research Indicating The Feasupporting

confidence: 92%

“…In the literature, there is only one work in relation to the catalyst properties of lithium Li-doped ZnO, which was prepared by an impregnation method, followed by calcination, and then used for the preparation of biodiesel [1].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, and catalytic properties of the Li-doped ZnO

Kulawik

Żarska

Folentarska

et al. 2018

J Therm Anal Calorim

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“…In addition, the process eliminates the formation of soap encountered in the homogeneous processes. Several examples of the heterogeneous catalysts that have been investigated are metal oxides [10][11], zeolites [12][13] and active metals loaded on supports [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Transesterification of Coconut Oil Using Dimethyl Carbonate and TiO2/SiO2 Heterogeneous Catalyst

Pandiangan

Simanjuntak

2013

Indones. J. Chem.

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“…Composition of fatty acids in WCO were identified using GC-MS. Fatty acids in WCO were quantified by comparing their retention times and peak areas to those of standard fatty acids shown in table 3 [20,21]. …”

Section: 4gas Chromatography (Gc) Analysis Of Wcomentioning

confidence: 99%

Transesterification of Waste Cooking Oil Catalysed by Crystalline Copper Doped Zinc Oxide Nanocatalyst

Sandhya

Velavan

Ravichandran

2016

JAC

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I S S N 2321-807XV o l u m e 12 N u m b e r 12 J o u r n a l o f A d v a n c e s i n C h e m i s t r y Transesterification of Waste Cooking Oil Catalysed by Crystalline Copper Doped Zinc Oxide Nanocatalyst AbstractBiodiesel has its unique position in the field of renewable energy as alternate fuel to diesel due to fuel price, energy requirement and petroleum crisis. In this study, biodiesel was produced from Waste Cooking Oil (WCO) using Copper doped Zinc Oxide (CZO) nanocatalysts. The synthesized Copper doped Zinc Oxide nanocatalysts were characterized by X-Ray Diffraction (XRD) and High Resolution Transmission Electron Microscope (HRTEM). Design of experiment was framed using Taguchi method to limit the experiments and to find the optimum reaction conditions. The effect of process parameters such as oil-to-methanol ratio (O/M), catalyst type, catalyst concentration, temperature and time on the transesterification reactions using characterized Copper doped Zinc Oxide nanocatalyst were investigated. The 4% (weight /weight) nanocatalyst concentration, 1:5 Oil to methanol molar ratio at 60°C temperature and 40 minutes of reaction time were found to be optimum, in which the maximum biodiesel yield of 98 % (w/w) was obtained. Hence it was determined that nanocatalysts exhibited good catalytic activities on biodiesel production from Waste Cooking Oil (WCO). Keywords:Biodiesel, Waste Cooking Oil, Copper doped Zinc Oxide, Transesterification. IntroductionFossil fuels such as petroleum, coal and natural gas are the major sources of increased pollution level. Studieshave shown that biodiesel being less polluting, non-toxic and biodegradable; it can be used directly in most diesel engines without much engine modifications. Biodiesel is commonly produced by transesterification of lipids, animal fats, grease and waste cooking oils [1,2,3,4,5,6,7,8,9,10,11,12,13].Catalyst plays an important role in transesterification reactions. Homogeneous catalysts result in the formation of soap which makes more complication in the reaction and also in the product separation. Heterogeneous catalysts has its own benefits such as ease of separation, easy recovery and can potentially be re-used. Finally, all these benefits leads to a reduced production cost [1,2,3,6]. Due to the nanodimension and morphological structure, the nanocatalyst composites provides higher catalytic activity [14,15]. This research work aims at conversion of WCO into biodiesel using the transesterification process with CZO nanocomposite as heterogeneous catalysts. Since nano particles have a large surface-to-volume ratio compared to bulk materials, they are attractive to use as catalysts for the transesterification reactions. Materials and methods MaterialsCupric sulphate, Zinc sulphate, Sodium carbonate were the chemicals used for synthesizing nanocatalyst. Methanol was used for transesterification reactions. All chemicals were of analytical grade purchased from Merck, India. Transesterification was carried out using Waste Cooking Oil, Copper doped Zinc Oxide nanoca...

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Catalytic Properties of Lithium-Doped ZnO Catalysts Used for Biodiesel Preparations

Cited by 97 publications

References 38 publications

Synthesis, characterization, and catalytic properties of the Li-doped ZnO

Synthesis, characterization, and catalytic properties of the Li-doped ZnO

Transesterification of Coconut Oil Using Dimethyl Carbonate and TiO2/SiO2 Heterogeneous Catalyst

Transesterification of Waste Cooking Oil Catalysed by Crystalline Copper Doped Zinc Oxide Nanocatalyst

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