Effect of TEPA on oxidation stability and metal ion content of biodiesel

Sui, Meng; Li, Fashe

doi:10.1016/j.renene.2019.04.128

Cited by 24 publications

(8 citation statements)

References 24 publications

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“…Therefore, the contribution provided by the composite PA matrix is negligible. Because the amine groups on the PA surface were coordinated with the nickel ions, they no longer have adsorption capacity. − The formation of coordination can also be verified by the SEM, XPS, and FT-IR spectrum tests. In Figure S9, both the SEM image and SEM-EDS data show that the amine groups have been well distributed on the interior pore surface.…”

Section: Resultsmentioning

confidence: 97%

A Highly Efficient and Stable Composite of Polyacrylate and Metal–Organic Framework Prepared by Interface Engineering for Direct Air Capture

Guo

Lv³

et al. 2021

ACS Appl. Mater. Interfaces

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We present a kilogram-scale experiment for assessing the prospects of a novel composite material of metal−organic framework (MOF) and polyacrylates (PA), namely NbOFFIVE-1-Ni@PA, for trace CO 2 capture. Through the interfacial enrichment of metal ions and organic ligands as well as heterogeneous crystallization, the sizes of microporous NbOFFIVE-1-Ni crystals are downsized to 200−400 nm and uniformly anchored on the macroporous surface of PA via interfacial coordination, forming a unique dual-framework structure. Specifically, the NbOFFIVE-1-Ni@PA composite with a loading of 45.8 wt % NbOFFIVE-1-Ni yields a superior CO 2 uptake (ca. 1.44 mol•kg −1 ) compared to the pristine NbOFFIVE-1-Ni (ca. 1.30 mol•kg −1 ) at 400 ppm and 298 K, indicating that the adsorption efficiency of NbOFFIVE-1-Ni has been raised by 2.42 times. Meanwhile, the time cost for realizing a complete adsorption/ desorption cycle in a fluidized bed has been shortened to 25 min, and the working capacity (ca. 0.84 mol•kg −1 ) declines only by 1.3% after 2000 cycles. The device is capable of harvesting 2.1 kg of CO 2 per kilogram of composite daily from simulated air with 50% relatively humidity (RH). To the best of our knowledge, the excellent adsorption/desorption performances of NbOFFIVE-1-Ni@PA position it as the most advantageous and practically applicable candidate for trace CO 2 capture.

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Section: Resultsmentioning

confidence: 97%

A Highly Efficient and Stable Composite of Polyacrylate and Metal–Organic Framework Prepared by Interface Engineering for Direct Air Capture

Guo

Lv³

et al. 2021

ACS Appl. Mater. Interfaces

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“…Moreover, the biodiesel contains unstable double bonds and will be polymerized in the oil pipeline for long-term use. The formation of macromolecular gelatinous substances, such as methyl dimer acid, may cause problems such as fuel system gelation, filter and nozzle clogging [8][9][10]. Obviously, the low temperature fluidity and oxidation stability of biodiesel not only affect its performance, but also affect the operation of various systems of motor vehicles and the storage of biodiesel [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Study on the Coupling Relationship of Low Temperature Fluidity and Oxidation Stability of Biodiesel

Zhang

et al. 2020

Applied Sciences

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Low temperature fluidity and oxidation stability are important indicators for the measurement of the performance of biodiesel, which are currently two major issues in association with the use of biodiesel on diesel engines. In the current work, actors affecting the low temperature fluidity and oxidation stability of biodiesel, such as adding reagents, changing the blending ratio, were studied separately. Then, the influencing factors were comprehensively analyzed to simultaneously improve the low temperature fluidity and oxidation stability of biodiesel through adjusting the proportion of fatty acid methyl esters (FAMEs). The results show that the cold fluidity improver (CFI) exerts the greatest influence on the biodiesel blending oil B10. When the CFI is added to 0.6%, the cold filter plugging point (CFPP) of B10 is reduced to a minimum of −17 • C. Additionally, blending ratio also has a great influence on the CFPP of biodiesel blended fuel. When the amount of biodiesel added is 5%, the CFPP of biodiesel blended fuel is equivalent to the CFPP of 0 petrol diesel (0PD). When the amount of biodiesel added exceeds 50%, the oxidation induction time (OIT) of biodiesel with different blending ratios can be made greater than 6 h by adding butylated hydroxyanisole (BHA) with a ratio of 0.1%. The CFPP and OIT of the blended fuel increase with the increasing of PME addition ratio. When the blending ratio of palm oil methyl ester (PME) and rapeseed oil methyl ester (RME) is R60P40, the CFPP is 0 • C, and the OIT is 5.9 h.

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“…10,11 The presence of transition metal ions catalyzes the oxidation reaction decreasing the biodiesel induction period. 2,12 Furthermore, the transition metal ions capable of transferring only one electron as cobalt, iron, copper, manganese and vanadium are more active catalysts, and a very small concentration is sufficient to promote the oxidation reaction. 13 In order to inhibit or slow the biodiesel degradation, additives should be used to improve the biofuel sustainability.…”

Section: Introductionmentioning

confidence: 99%

“…The use of antioxidants has been the most efficient way to increase the stability of biodiesel thus prolonging its storage time. 12 Effective antioxidants are those capable of inhibiting or eliminating the free radicals formed in the oxidation reaction of the methyl esters from biodiesel. 13,14 Extracts from some plants has been used as natural antioxidants due to the phenolic compounds found in their compositions.…”

Section: Introductionmentioning

confidence: 99%

The Catalytic Action of Copper Ions and the Rosemary Extract Antioxidant Effect in the Biodiesel Oxidation Reaction and the Implication in Arrhenius Behavior

Spacino

Mantovani

Marcheafave

et al. 2020

J. Braz. Chem. Soc.

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Biodiesel contains esters in its composition which make it susceptible to oxidation. Among the factors that cause this reaction is the contamination with metal ions. In the present work, it was analyzed biodiesel samples obtained from a mixture containing 39.0% m/m soybean oil, 22.0% m/m beef tallow and 39.0% m/m poultry fat using a methyl route. Copper ions were added to the biodiesel to evaluate its catalytic action in the oxidation reaction, in the presence and absence of rosemary extract. During 192 h of assay, samples containing copper, without extract, showed shorter induction periods, higher rate constants and lower activation energy, when compared to samples containing extract, at the same assay temperature. Copper ions presented a strong catalytic action causing linearity deviations showing a super-Arrhenius behavior, while rosemary extract delayed the oxidative process and showed no linearity deviations.

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Effect of TEPA on oxidation stability and metal ion content of biodiesel

Cited by 24 publications

References 24 publications

A Highly Efficient and Stable Composite of Polyacrylate and Metal–Organic Framework Prepared by Interface Engineering for Direct Air Capture

A Highly Efficient and Stable Composite of Polyacrylate and Metal–Organic Framework Prepared by Interface Engineering for Direct Air Capture

Study on the Coupling Relationship of Low Temperature Fluidity and Oxidation Stability of Biodiesel

The Catalytic Action of Copper Ions and the Rosemary Extract Antioxidant Effect in the Biodiesel Oxidation Reaction and the Implication in Arrhenius Behavior

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