Novel 1H low field nuclear magnetic resonance applications for the field of biodiesel

被引:40
作者
Berman, Paula [1 ,2 ]
Leshem, Adi [1 ,2 ]
Etziony, Oren [1 ,2 ]
Levi, Ofer [3 ]
Parmet, Yisrael [3 ]
Saunders, Michael [4 ]
Wiesman, Zeev [1 ,2 ]
机构
[1] Ben Gurion Univ Negev, Phytolipid Biotechnol Lab, Dept Biotechnol, IL-84105 Beer Sheva, Israel
[2] Ben Gurion Univ Negev, Dept Energy & Environm Engn, IL-84105 Beer Sheva, Israel
[3] Ben Gurion Univ Negev, Dept Ind Engn & Management, IL-84105 Beer Sheva, Israel
[4] Stanford Univ, Dept Management Sci & Engn, Stanford, CA 94305 USA
关键词
H-1 low field nuclear magnetic resonance; Biodiesel; Biodiesel physical properties; Chemometrics; Laplace inversion; Transesterification; NMR RELAXATION; T-2; RELAXATION; OLIVE STONES; OIL; WATER; TRANSESTERIFICATION; H-1-NMR; STARCH; CHEMOMETRICS; VISCOSITY;
D O I
10.1186/1754-6834-6-55
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Background: Biodiesel production has increased dramatically over the last decade, raising the need for new rapid and non-destructive analytical tools and technologies. H-1 Low Field Nuclear Magnetic Resonance (LF-NMR) applications, which offer great potential to the field of biodiesel, have been developed by the Phyto Lipid Biotechnology Lab research team in the last few years. Results: Supervised and un-supervised chemometric tools are suggested for screening new alternative biodiesel feedstocks according to oil content and viscosity. The tools allowed assignment into viscosity groups of biodiesel-petrodiesel samples whose viscosity is unknown, and uncovered biodiesel samples that have residues of unreacted acylglycerol and/or methanol, and poorly separated and cleaned glycerol and water. In the case of composite materials, relaxation time distribution, and cross-correlation methods were successfully applied to differentiate components. Continuous distributed methods were also applied to calculate the yield of the transesterification reaction, and thus monitor the progress of the common and in-situ transesterification reactions, offering a tool for optimization of reaction parameters. Conclusions: Comprehensive applied tools are detailed for the characterization of new alternative biodiesel resources in their whole conformation, monitoring of the biodiesel transesterification reaction, and quality evaluation of the final product, using a non-invasive and non-destructive technology that is new to the biodiesel research area. A new integrated computational-experimental approach for analysis of H-1 LF-NMR relaxometry data is also presented, suggesting improved solution stability and peak resolution.
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页数:20
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