Key and Open Laboratory of Forest Chemical Engineering

Nanjing, China

Key and Open Laboratory of Forest Chemical Engineering

Nanjing, China

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Jia Y.-J.,Key and Open Laboratory of Forest Chemical Engineering | Jiang J.-C.,Key and Open Laboratory of Forest Chemical Engineering | Sun K.,Key and Open Laboratory of Forest Chemical Engineering | Chen C.,Key and Open Laboratory of Forest Chemical Engineering
Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology | Year: 2017

Activated carbons (AC) were obtained through carbonization of polyaniline and modified lignosulfonate composite (PAn-MLS) under different temperatures; they are characterized by fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, nitrogen sorption and scanning electron microscope (SEM). With these carbon materials as the support, a series of Pd-AC catalysts for the oxidation of formic acid were prepared by liquid phase reduction and characterized by X-ray diffraction (XRD), transmission electron microscope (TEM) and electrochemical analysis. The results show that with the activated carbon prepared at 800℃ (AC800) as the support, the Pd-AC800 catalyst obtained performs best in the oxidation of formic acid; the palladium particles have an average size of 5.4 nm and the electro-active surface area reaches 53.78 m2/g. As the oxidation of formic acid over Pd-AC800 is realized through direct pathway rather than CO pathway, Pd-AC800 may be considered as a potential electrode material in direct formic acid fuel cells (DFAFC). © 2017, Science Press. All right reserved.


Ding S.,Key and Open Laboratory of Forest Chemical Engineering | Huang L.,Key and Open Laboratory of Forest Chemical Engineering | Zhang C.,Key and Open Laboratory of Forest Chemical Engineering | Zhang C.,Beijing Institute of Technology | And 3 more authors.
Chemistry and Industry of Forest Products | Year: 2017

Using olive pomace as the raw material, the alkali method was adopted to extract soluble dietary fiber (SDF) and insoluble dietary fiber (IDF), and its physicochemical properties were also studied. The extraction conditions of IDF and SDF were optimized through orthogonal test based on single factor test. The results showed that the optimum extraction conditions were concentration of NaOH 8%, the extraction temperature of 80℃, the extraction time 80 min, and liquid-solid ratio of 15:1 (mL:g). Under this conditions, the yields of SDF and IDF were 28.74% and 52.39%, respectively. The results of physicochemical properties showed that the water holding capacity, swelling capacity and oil holding capacity of IDF were 3.38 g/g, 2.20 mL/g, 1.91 g/g, respectively. The water holding capacity, swelling capacity and oil holding capacity of SDF were 5.05 g/g, 4.78 mL/g and 4.25 g/g, respectively. The glucose dialysis retardation index of SDF, IDF and defatted pomace were 13.22%, 8.55% and 4.38%, respectively, by the dialysis for 90 min. The results of scanning electron microscope showed that IDF had looser morphology and more cavities and cracks, and SDF had smaller particle size and more cavities after alkali extraction. © 2017, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.


Chen H.,Key and Open Laboratory of Forest Chemical Engineering | Wang C.,Key and Open Laboratory of Forest Chemical Engineering | Wang C.,Beijing Institute of Technology | Zhou H.,Key and Open Laboratory of Forest Chemical Engineering | And 3 more authors.
Chemistry and Industry of Forest Products | Year: 2017

The ethanol extract from Rhus verniciflua Stokes wood powder was partitioned with different polarity solvents to obtain petroleum ether fraction, ethyl acetate fraction, n-butylalcohol fraction and water fraction. The DPPH·, ABTS· and OH· scavenging activities of the four fractions were evaluated. The results showed that the extraction yield of ethyl acetate was the highest (60.1%) and its scavenging activities of DPPH·, ABTS· and OH· were the strangest with the IC50 of 19.9, 29.74 and 37.95 mg/L, respectively. Twelve compounds in ethyl acetate fraction were identified by HPLC-MS, including six phenolic acids, i.e., ethoxy-3-hydroxy benzoic acid(1), gallic acid(2),3,4-dihydroxy almond acid(3), gallic acid cetyl ester(4), protocatechuic acid(5) and ethyl gallate(7) and six flavonoids, i.e., fustin(6),3,4',7-trihydroxy-flavanonol(9), fisetin (13), sulfuretin(14), butin(15) and 3,7-dihydroxy flavanone-4'-rhamnose(16). © 2017, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.


Zhao J.-P.,Key and Open Laboratory of Forest Chemical Engineering | Jiang J.-C.,Key and Open Laboratory of Forest Chemical Engineering | Jiang J.-C.,Beijing Institute of Technology | Xu J.-M.,Key and Open Laboratory of Forest Chemical Engineering | And 2 more authors.
Chemistry and Industry of Forest Products | Year: 2016

Waste cooking oil were used to produce biodiesel by pyrolysis and esterification reaction The results showed that main components in pyrolytic oil was main alkanes and alkenes with the carbon chain between C10 and C18 (total content reach 64%), and a small amount of carboxylic acid compounds. Fuel properties of pyrolytic products were great promoted by esterification reaction. The esterificatied product exhibited good performances with acid value 0.29 mg/g, viscosity 2.58 mm2/s, calorific value 44 MJ/kg, pour point -7℃, and cold filter plugging point -3℃. They met national standard biodiesel. The performance of diesel engine when blend 0# diesel oil with waste cooking oil biodiesel was tested. The test showed that power and torque of the blending fuel are basically the same, and exhaust emissions of diesel engine are more green than 0# diesel. © 2016, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.


Yuan J.-J.,Key and Open Laboratory of Forest Chemical Engineering | Ye J.-Z.,Key and Open Laboratory of Forest Chemical Engineering | Wang C.-Z.,Key and Open Laboratory of Forest Chemical Engineering | Wang C.-Z.,Beijing Institute of Technology | Lu L.,Hubei Academy of Forestry
Chemistry and Industry of Forest Products | Year: 2015

Chemical syntheses of hydroxytyrosol from different materials were investigated. Its disadvantages included long route, the low yield of product, and expensive catalyst as well as toxic reactants, etc.. This paper emphatically summarized biological synthetic routes for hydroxytyrosol with oleuropein and tyrosol. Furthermore, the syntheses and biological activities of hydroxytyrosol alkyl ether, lipophilic fatty acid ester, and glucoside derivatives, and structure-activity relationship were introduced. It is important to further study the syntheses of hydroxytyrosol and derivatives, and exploit new medicine of anti-tumor, anticancer, cardiovascular and cerebrovascular diseases. ©, 2015, Edited & Published by Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.


Yu W.-J.,Key and Open Laboratory of Forest Chemical Engineering | Ying H.,Key and Open Laboratory of Forest Chemical Engineering | Wang Y.-J.,Key and Open Laboratory of Forest Chemical Engineering | Sun N.,Key and Open Laboratory of Forest Chemical Engineering
Reneng Dongli Gongcheng/Journal of Engineering for Thermal Energy and Power | Year: 2015

The CO2 catalytic gasification of pine sawdust was studied by fixed-bed reactors and thermal gravimetric analysis. The results showed that: (1) Increasing the temperature and adding CaCO3 and K2CO3 catalyst helped increasing gas production, reducing the yield of liquid and solid production; but when the temperature reached 950 ℃, the trend of gas production gradually weakened, instead, the liquid yield slightly increased and the production of solid slowly decreased. The gas was mainly composed of CO and CO2, followed by H2 and CH4, and other gases such as C2H6, C2H4 and C2H2, but the content was low. (2) Increasing the temperature and adding CaCO3 catalyst was benefit for tar cracking and reducing the component of tar, however, adding K2CO3 catalyst increased the component of tar. (3) Adding CaCO3 catalyst, the solid product has not been seriously damaged, but the surface of the solid product containing more CaCO3, formation of the active centers, promoting the reaction of CO2 with pine sawdust. Adding K2CO3, the solid product was significantly damaged, K2CO3 infiltration to pine sawdust in catalytic, with C forming KCK intercalated structure, promoting pine sawdust and CO2 response. ©, 2015, Harbin Research Institute. All right reserved.


Lin Y.,Key and Open Laboratory of Forest Chemical Engineering | Fang G.-G.,Key and Open Laboratory of Forest Chemical Engineering | Huo D.,Key and Open Laboratory of Forest Chemical Engineering
Chemistry and Industry of Forest Products | Year: 2015

As a kind of biological polysaccharide, dextran contains many free hydroxyl groups on the main chain, which is convenient for modification and crosslinking. The hydrogels prepared by dextran exhibited excellent swelling property, biocompatibility and biodegradability. Dextran is widely applied in the fields of substance separation, drug delivery and tissue engineering. Kinds of common preparation methods of dextran-based hydrogels, including repeated freezing-thawing method, chemical crosslinking method, grafting modification method, and free radical polymerization, have been summarized, Besides, the applications of dextran-based hydrogels in recent years are reviewed and the future developments are discussed in present study. © 2015, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.


Cui H.-H.,Key and Open Laboratory of Forest Chemical Engineering | Fang G.-G.,Key and Open Laboratory of Forest Chemical Engineering
Chemistry and Industry of Forest Products | Year: 2015

The identification of eucalyptus and acacia wood and classification among six kinds of wood were studied in this paper, based on near-infrared spectroscopy method combined with chemometrics algorithm. Firstly, near-infrared spectra of 86 samples, containing Eucalyptus urophylla×E. grondis, E. urophylla L11, E. urophylla U6, E. globules, Acacia mangium and A. crassicarpa. were collected, Then partial least squares discriminant analysis (PLS-DA) was used to establish a classification model of eucalyptus and acacia. The results showed that the regression lines between predicted value and actual value of calibration set and validation set were in good agreement, and the coefficient of determination (R2) were 0.99 and 0.97. This showed that the model was better. Moreover, the accuracy of the unknown samples was 100%. MSC and Savitzky-Golay smoothing method were used to pretreat the spectral of 4000-7500 cm-1, and discrimination model was established based on the principal component analysis (PCA). Results showed that the recognition rate of the calibration and validation model was 100%. Therefore, the chemometrics algorithm based on near infrared spectra could identify the eucalyptus and acacia species quickly. © 2015, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.


Xie Z.-H.,Key and Open Laboratory of Forest Chemical Engineering | Jin L.-W.,Key and Open Laboratory of Forest Chemical Engineering | Jin L.-W.,Beijing Institute of Technology
Chemistry and Industry of Forest Products | Year: 2014

Composites of acetylated wood flour (AWF)/low-density polyethylene (LDPE) were prepared by extrusion-injection molding process, and cardanol acetate (CA) and epoxy cardanol acetate (ECA) were added respectively. Properties such as tensile strength and hydrophobic as well as surface energy, migration of plasticizers and thermal mechanical properties (TMA) were studied. The results showed that the tensile strength of composites decreased with the increasing content of plasticizers, but tensile strength of all composites with CA were higher than that of composites with ECA. Composites with 5% plasticizers showed similar hydrophobicity, but composites with 15% CA was more hydrophobic, and contact angle test showed the similar results. The migration test of plasticizers revealed ECA had lower transfer constant (4.35×10-4) than that of CA (5.48×10-4) at 85℃ in 100 min, and ECA retained more in the composites after 3 700 min. The result of TMA exhibited the inflation of composites intensified with increasing temperature, and composites with 15% ECA showed higher coefficient of linear expansion (3 758 μm/(m·℃)) than that of composites with CA (3 182 μm/(m·℃)). ©, 2014, Editorial Board of "Chemistry and Industry of Forest Products". All right reserved.


Xie Z.-H.,Key and Open Laboratory of Forest Chemical Engineering | Zhang M.-M.,Key and Open Laboratory of Forest Chemical Engineering | Jin L.-W.,Key and Open Laboratory of Forest Chemical Engineering | Jin L.-W.,Beijing Institute of Technology
Chemistry and Industry of Forest Products | Year: 2015

Blends of wood fluor (WF), acetylation wood flour (AWF) with low density polyethylene (LDPE) and polylactic acid (PLA) were produced by twin-screw extruding and injection molding, respectively. Hydrophobicity, rheology, mechanical properties, and morphology of the composites were measured by moisture absorption, contact angle measurement, rotational rheometer, tensile tests and scanning electrical microscope (SEM), respectively. The results showed blending composites of AWF had better hydrophobic performance, and its moisture absorption reduced significantly compared with blending composites of WF. The moisture absorption decreased with the decrease of AWF content in composites, and the contact angle increased. Compared with WF/LDPE composites, AWF/LDPE composites had less viscosity and storage modulus. The viscosity and storage modulus of AWF/LDPE composites decreased with the decrease of AWF. The tensile strength of AWF blend composites was lower than that of WF blend composites, but the elongation at break showed a substantial increase. The results of SEM showed that the compatibility between AWF and plastic matrix was improved, and they adhered and blended more closely. ©, 2015, Editorial Board of Chemistry and Industry of Forest Products. All right reserved.

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