Jiangsu Qianglin Biomass Energy Co.

Licheng, China

Jiangsu Qianglin Biomass Energy Co.

Licheng, China

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Feng J.,CAF Institute of Chemical Industry of Forest Products | Jiang J.,CAF Institute of Chemical Industry of Forest Products | Jiang J.,Jiangsu Qianglin Biomass Energy Co. | Yang Z.,CAF Institute of Chemical Industry of Forest Products | And 4 more authors.
RSC Advances | Year: 2016

This investigation aimed to analyze the renewable phenolic compounds that separate from liquefied mason pine. One-step thermal conversion of biomass to phenolic products from waste mason pine using an acidic catalyst and methanol was accomplished under mild conditions. Three fractions (fractions 1#, 2#, and 3#) of phenolic compounds with high added-value were extracted with water-organic solvent from liquefied oil via a stepwise fractionation process. The structural features of three phenolic compounds and depolymerized lignin were analyzed and identified by a combination of heteronuclear single quantum correlation-nuclear magnetic resonance, gel permeation chromatography, Fourier transform infrared spectroscopy, and thermogravimetric analysis, showing interesting functionalities for biochemical and biofuel applications. In this investigation, guaiacyl (G) and p-hydroxybenzoate (PB) aromatics were the basic units of three phenolic compound fractions. Etherified syringyl aromatics were evident in fractions 1# and 3#. There were only single-aromatic-ring units (such as G and PB units) in phenolic compound fraction 2#. In the aromatic region, the absence of β-O-4′ ether linkage, resinol, and phenylcoumaran units in three phenolic compound fractions indicated that depolymerization of lignin occurred during the liquefied biomass process. The molecular weights of three phenolic compound fractions were significantly different (797, 249, and 497, respectively) along with fractions 1#, 2#, and 3#. The phenolic compounds could be separated into a high, lower, and lowest molecular weight fraction in this study. As evidenced by GC-MS spectra, the three phenolic compound fraction products and depolymerized lignin were mainly comprised of phenolic derivatives, such as 3-methyl-4-ethylphenol, 4-ethyl-2-methoxyphenol, and 3-methylcatechol. Percentages of the total phenols and derivatives in the three phenolic compound fractions and depolymerized lignin were 77.59%, 81.76%, 80.19%, and 78.86%, respectively. Therefore, the three phenolic compound fractions were clearly quantified and valuable, and can be used as chemical products. © 2016 The Royal Society of Chemistry.


Guan Q.,CAF Institute of Chemical Industry of Forest Products | Jiang J.,CAF Institute of Chemical Industry of Forest Products | Jiang J.,Jiangsu Qianglin Biomass Energy Co. | Xu J.,CAF Institute of Chemical Industry of Forest Products | And 3 more authors.
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2016

With the increasing energy requirements and pollution problems worldwide, energy from renewable resources has received global attention in recent decades. Biomass is one of the most abundant renewable resources. It mainly includes forest residues, agricultural wastes, industrial residues, municipal solid wastes, bagasse, aquatic plants, and algae animal wastes. Due to the advantages of abundance, non-polluting, being renewable and easy to obtain, biomass is considered as the most promising energy feedstock to replace the traditional energy. Meanwhile, it is the only resource that can be converted into solid, liquid, and gaseous products for use of fuels. Thermo-chemical conversion is an effective technology of biomass conversion. Liquefaction is the typical thermo-chemical technology for the conversion of biomass to obtain liquid biofuels and valuable chemicals, such as bio-oil and fuel additives. The conversion process is not only influenced by organic reagents but also by different catalysts. Effective catalyst is an essential factor to improve liquefaction efficiency. As catalyst, sulfuric acid has very strong corrosion and needs high-quality liquefaction equipment, and its recycling is difficult. Solid acid is used to overcome shortcomings of organic acid in the liquefaction, but it is easy to form coke to cause the deactivation of catalyst, and needs to be calcined before re-use, which increases the reaction cost. Now, it is found that the ionic liquid has non-corrosiveness, low melting point, high thermal stability and low vapor pressure, and some other merits. It has a broad application prospect used as solvents and catalysts in catalytic reactions. Ionic liquid, especially sulfonated bisulfate ionic liquid can dissolve cellulose, because it has higher acidic sites that can easily break the hydrogen bonds of biomass material, and promote the degradation and conversion of cellulose. At present, ionic liquid is usually used to catalyze carbohydrate, which is changed into 5-hydroxymethylfurfural (HMF). The report about producing levulinate from agriculture waste catalyzed by ionic liquids is rare. Therefore, we choose wheat straw as raw material and ionic liquids as catalyst in the liquefaction process. In this study, 1-methyl-3-(4-Sulfobutyl)-imidazolium hydrosulfate is synthesized and used as catalyst for the liquefaction of wheat straw in ethanol. Fourier transform infrared spectrometer (FT-IR), nuclear magnetic resonance carbon-13 spectrum (13C NMR), thermo gravimetric analyzer (TG) and gas chromatography-mass spectrometry (GC-MS) characterized the structure of ionic liquid and liquid products. The synthesized ionic liquid is confirmed to be 1-methyl-3-(4-Sulfobutyl)-imidazolium hydrosulfate. Results of the experiments show that the ionic liquid has the optimum catalytic properties for the liquefaction of wheat straw. Under the conditions that wheat the straw mass is 5 g, the mass fraction of catalyst is 26%, the reaction temperature is 200℃, and the reaction time is 60 min, a high conversion rate of 85.5% is obtained; under the conditions, the yield of ethyl levulinate is 9.97%, and the relative percentage content of ethyl levulinate is 29.9% in liquid products. The liquid products include aldehydes, ketones, esters, carboxylic acids, phenols and other oxygenated chemicals; among them, phenols are from the degradation of lignin mainly, and the other compounds are from the degradation of hemicellulose and cellulose principally. The results can provide theoretical basis for the development and utilization of low corrosive and environment-friendly catalysts, which will be used on liquefaction to prepare high grade chemicals. © 2016, Editorial Department of the Transactions of the Chinese Society of Agricultural Engineering. All right reserved.


Feng J.,CAF Institute of Chemical Industry of Forest Products | Jiang J.,CAF Institute of Chemical Industry of Forest Products | Jiang J.,Jiangsu Qianglin Biomass Energy Co. | Xu J.,CAF Institute of Chemical Industry of Forest Products | And 3 more authors.
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | Year: 2015

Using Raney Ni as catalyst for methanol aqueous phase reforming of bio-oil with model compounds, phenolsitu hydrogenation reaction has been studied. In the first place, exploring a different amount of the catalyst, reaction time and reaction temperature on phenol in situ plus hydrogen conversion rate and the yield of the target product, then the optimal reaction conditions for different phenols in situ hydrogenation were investigated. Research shown that the reaction temperature is 220℃, the heating voltage and the stirring speed under certain conditions, the reaction Raney Ni dosage is 1.5 g, the reaction time is 7 hours, at last the conversion of phenol is 91.64%, the target product is obtained in a yield of 84.09%. Coupling reaction using hydrogen, bio-oil conversion of phenol model compounds is higher than the conversion rate without hydrogen, while simplifying the production process of liquid phase catalytic hydrogenation, to avoid the presence of hydrogen externally various problems biomass to mention the quality of liquefied oil refinery provides the basis of the experiment and new research ideas. ©, 2015, Science Press. All right reserved.


Feng J.-F.,CAF Institute of Chemical Industry of Forest Products | Jiang J.-C.,CAF Institute of Chemical Industry of Forest Products | Jiang J.-C.,Jiangsu Qianglin Biomass Energy Co. | Xu J.-M.,CAF Institute of Chemical Industry of Forest Products | And 2 more authors.
Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology | Year: 2014

The liquefaction of ligno-cellulosic biomass materials of bamboo, poplar, pine and eucalyptus woods was investigated in methanol under high pressure with H2SO4 as catalyst. The results indicated that the biomass materials are converted into bio-gas, solid residue and bio-oil after reaction at 200°C for 30 min. The bio-oil can be further separated into a variety of high value-added products such as alkyl polyglycosides, levulinate acid esters, and polyphenols. Alkyl polyglycosides is the main component of the liquefied products and accounts for 83.38% by weight; besides, phenolic products are mainly composed of 4-ethyl-2-methoxyphenol, eugenol and 3, 4-dimethoxyphenol, which account for about 65.79% by weight. Considering the molecular structure of lingo-cellulosic materials, it was proposed that cellulose and hemicellulose are transformed to alkyl glucoside, levulinate esters, etc. with methanol catalyzed by sulfuric acid under high pressure. Due to electron donating effects of phenolic hydroxyl and methoxy groups, guaiacol, phenol and a series of phenolic compounds are formed through the cleavage of C-C bond of guaiacyl units in lignin.


Li X.,CAF Institute of Chemical Industry of Forest Products | Li X.,Jiangsu Qianglin Biomass Energy Co. | Jiang J.,CAF Institute of Chemical Industry of Forest Products | Li K.,CAF Institute of Chemical Industry of Forest Products | And 3 more authors.
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | Year: 2011

The preparation and production technology of biodiesel was introduced. The transesterification mechanism was discussed from the synthesis reaction of biodiesel. Then the synthetic effects on the reaction were investigated such as water of the raw material oil, free fatty acids, temperature, pressure, catalyst, reaction time, alcohol-oil ratios, the mixing degree of raw materials and other aspects. The best synthetic technology was obtained.

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