Food and Pharmaceutical Engineering Institute

Guiyang, China

Food and Pharmaceutical Engineering Institute

Guiyang, China
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Chang F.,Guizhou University | Chang F.,Institute of Comprehensive Utilization of Plant Resources | Wang R.,Food and Pharmaceutical Engineering Institute | Zhou Q.,Guizhou University | And 2 more authors.
International Journal of Chemical Engineering | Year: 2017

Mesoporous solid acids Ta3W7 and Nb3W7 were prepared from TaCl5 and NbCl5 with WCl6 in the presence of stearic acid (SA) via a sol-gel method, respectively. For comparison, mesoporous Ta3W7-P123 mixed oxides and mesoporous Nb3W7-P123 mixed oxides were synthesized in the same way. The catalysts were characterized through TGA, XRD, SEM, TEM, BET, and NH3-TPD. Experimental results showed that Ta3W7-SA and Nb3W7-SA exhibited several advantages such as higher activity, shorter preparation period, lower cost, stronger acid sites, and higher surface area, which had potential to be used as mesoporous heterogeneous catalysts in biodiesel production. © 2017 Fei Chang et al.

Wang R.,Food and Pharmaceutical Engineering Institute | Xie X.,Food and Pharmaceutical Engineering Institute | Ma L.,Food and Pharmaceutical Engineering Institute | Liu Z.,Food and Pharmaceutical Engineering Institute | And 3 more authors.
Industrial Crops and Products | Year: 2014

In the present research, the potential of Stauntonia chinensis (SC) seed oil obtained from processing waste was investigated for the first time as biodiesel feedstock, including physicochemical properties of the oil, the heterogeneous catalysis process, purification, and fuel properties. A 29.37. ±. 0.64. wt.% of oil content and 2.41. mg KOH/g of acid value was found. Under the optimised reaction conditions in the presence of modified calcite, an 88.02% of yield and a 98.90. wt.% of FAME content were achieved. According to EN 14124 (2012), SC biodiesel exhibited superior fuel properties compared to the most of other feedstock oils since it had an ideal fatty acid composition (low Cn:0 (8.06. wt.%), high Cn:1 (80.16. wt.%), and low Cn:2,3 (8.45. wt.%)). It was absolutely vital that the use of SC seed oil as a biodiesel feedstock would not compete with its use in food. In summary, SC seed oil should be recommended as a promising feedstock for biodiesel. © 2014 Elsevier B.V.

Li C.-M.,Guizhou University | Li B.-G.,Food and Pharmaceutical Engineering Institute | Yu J.-P.,Guizhou University
Micro and Nano Letters | Year: 2014

An effective method for Agrobacterium tumefaciens inhibition using silica nanoparticles (NPs) as the carrier and melittin as the antibacterial drug is developed. The diameters of the inhibition zones of A. Tumefaciens treated with different concentrations of melittin-conjugated silica NPs, pure silica NPs, gentamicin and free melittin are determined. The results indicate that the pure silica NPs have no impact on A. Tumefaciens. The melittin-conjugated silica NPs have strong antibacterial activity against A. Tumefaciens. In addition, the antibacterial activity of the melittin-conjugated silica NPs is dose dependent. The diameter of the inhibition zone caused by the melittin-conjugated silica NPs is almost the same as the positive control. Compared with the free drug molecules, silica NPs as an ideal carrier can gather a large number of drug molecules on their surface so as to greatly enhance the antibacterial activity. © 2014 The Institution of Engineering and Technology.

Wang R.,Guizhou University | Wang R.,Food and Pharmaceutical Engineering Institute | Li H.,Guizhou University | Chang F.,Guizhou University | And 7 more authors.
Catalysis Science and Technology | Year: 2013

Despite their potential for biodiesel synthesis, directly calcined minerals rich in magnesium/calcium carbonates are used at the expense of large amounts of the catalyst, high alcohol loading, long processing times, and severe conditions. We report a facile and low-cost route for preparing calcined porous calcite (CPC) and dolomite (CPD) via simple thermal decomposition of the reaction mixtures of natural calcite and dolomite with stearic acid. CPC and CPD, both of which have porous structures, were compared with previously reported catalysts and examined as promising heterogeneous base catalysts under mild conditions. A 40% increase in conversion through CPC and CDC was achieved compared with that achieved through directly calcined minerals. A systematic understanding of the enhancement and deactivation relationships of the products was established by catalyst characterization, including XRD, BET, CO 2-TPD, SEM, TEM, and XPS. The obtained CPC and CPD showed large pore sizes and high active site densities and provided an advantageous environment for transesterification of triglyceride with methanol. CPC and CPD are re-usable and show no loss of activity after regeneration. © The Royal Society of Chemistry 2013.

Xing D.K.,Jiangsu University | Wu Y.Y.,Chinese Research Academy of Environmental Sciences | Wang R.,Food and Pharmaceutical Engineering Institute | Fu W.G.,Jiangsu University | And 2 more authors.
Journal of Animal and Plant Sciences | Year: 2015

Drought is considered the main environmental factor limiting plant growth in karst habitats. For this study, seedlings of Jatrophacurcas L. and Verniciafordii H. were submitted to a 10-day drought stress period at 5 different intensities. Photosynthesis, biomass, carbonic anhydrase (CA), and glucose-6-phosphate dehydrogenase (G6PDH) activities were determined. It was discovered that photosynthesis of the V. fordii was more sensitive to drought stress, and the water-use efficiency (WUE) of the V. fordii responded earlier in order to adapt to the induced drought stress. However, the J. curcas accumulated more biomass with better photosynthetic tolerance under drought stress. As the drought stress increased, the G6PDH activity of the V. fordii was activated at 20% or 30% PEG level, the higher G6PDH activity of the V. fordii maintained the redox equilibrium of the cells and produced NADPH for the formation of unsaturated fatty acids. As a result, the degree of unsaturation of fatty acids in the V. fordii was affe ted, and its cetane number and iodine value changed; thus, the fuel properties of the biodiesel were affected. Therefore, the photosynthesis and G6PDH activity of a plant should be taken into consideration when selecting appropriate biomass energy plants in karst habitats. © 2015, Pakistan Agricultural Scientists Forum. All rights reserved.

Wang R.,Chinese Academy of science | Wang R.,Food and Pharmaceutical Engineering Institute | Wu Y.,Chinese Academy of science | Hang H.,Chinese Academy of science | And 7 more authors.
Energy Conversion and Management | Year: 2014

The development of biomass on marginal lands has been investigated and proven to be feasible. Orychophragmus violaceus grows naturally in the karst region and shows a stronger bicarbonate-use capacity and adaptability than some other plants. In the present study, the systemic parameters of seed samples from four locations were determined, including the oil contents (30.59-36.81 wt%), acid values (2.76-5.68 mg KOH/g), iodine values (111.02-147.58 g I 2/100 g), and fatty acid composition. O. violaceus oil was mainly composed of palmitic acid (C16:0, 10.65-13.06 wt%), stearic acid (C18:0, 6.41-8.31 wt%), oleic acid (C18:1, 16.56-25.58 wt%), and linoleic acid (C18:2, 46.07-52.16 wt%). O. violaceus seed oil from Guiyang was converted to biodiesel by calcined porous calcite. The catalyst amount was optimised, and refined biodiesel was prepared by vacuum distillation. The fuel properties of the O. violaceus biodiesel samples all met the EN 14214 (2012) standards, except for the cetane number and oxidation stability. In summary, O. violaceus from the karst marginal land is highly recommended as a biomass feedstock. © 2014 Elsevier Ltd. All rights reserved.

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