Engineering Laboratory of Henan Province for Biorefinery Technology and Equipment

Zhengzhou, China

Engineering Laboratory of Henan Province for Biorefinery Technology and Equipment

Zhengzhou, China
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Li F.,Zhengzhou University | Bai J.,Zhengzhou University | Bai J.,Engineering Laboratory of Henan Province for Biorefinery Technology and Equipment | Chang C.,Zhengzhou University | And 9 more authors.
Xiandai Huagong/Modern Chemical Industry | Year: 2015

The methods of systematic analysis commonly used in microalgae biodiesel production cost analysis, including technical and economic analysis and life cycle analysis, are introduced. Meanwhile, from aspects of the unit cell lipid content, biomass yield and the balance of resource and energy, the development status of cost control technologies such as microalgae cultivation, harvesting and lipid extraction are summarized. Finally, the future development direction is also prospected. ©, 2015, China National Chemical Information Center. All right reserved.


Chang C.,Zhengzhou University | Chang C.,Engineering Laboratory of Henan Province for Biorefinery Technology and Equipment | Xu G.,Henan Agricultural University | Zhu W.,Zhengzhou University | And 4 more authors.
Fuel | Year: 2014

Ethyl levulinate has been considered as a potential liquid biofuel candidate for the future. The conversion of glucose to ethyl levulinate in ethanol medium was firstly investigated in this study. Experimental results showed that the combination of extremely low sulfuric acid and zeolite USY can be used as an effective catalytic system for one-pot EL production from glucose. The ethyl levulinate yield of 51.47% from glucose can be obtained at 180 °C and 120 min in the mixed acid system comprising of 0.1% sulfuric acid and 2.0% USY. Furfural residues were further taken as substrates for ethyl levulinate production in the mixed acid system. Artificial neural network coupled with genetic algorithm was employed to optimize the process. The optimum conditions were reaction temperature 219 °C, USY loading 2.3%, mass ratio of liquid to solid 40 and reaction time 107 min. Under the optimum conditions, higher ethyl levulinate yield of 18.68% was obtained, representing a theoretical yield of 51.22%. © 2014 Elsevier Ltd. All rights reserved.


Chang J.-L.,Zhengzhou University | Bai J.,Zhengzhou University | Bai J.,Engineering Laboratory of Henan Province for Biorefinery Technology and Equipment | Chang C.,Zhengzhou University | And 6 more authors.
Chemistry and Industry of Forest Products | Year: 2015

The distribution of products from glucose catalyzed by extremely low sulfuric acid (≤0.1%) in ethanol and ethanol/co-solvent medium was investigated. The results showed that ethyl levulinate (EL) was the main product in the liquid with a yield of 40.46% under the reaction conditions of glucose concentration 20 g/L, reaction temperature 200℃, sulfuric acid concentration 0.1% and reaction time 120 min. The influence of nine kinds of ethanol/solvent system was compared, and the effect of using n-hexane as a co-solvent was further investigated. Moreover, the effect of using n-hexane as a co-solvent was investigated, and similar results of the distribution of products were obtained compared with the results in pure ethanol system. The addition of n-hexane could not increase the yield of EL effectively, but it can improve the concentration of intermediate of 5-ethoxymethylfurfural (EMF). It also can prevent EMF of further hydration to form EL. Ethyl glucoside (EG) was easily obtained from glucose with lower or higher reaction temperature accompanied with shorter reaction time. Increment of the reaction temperature and reaction time has positive effect on generation of EL. The byproducts, such as levulinic acid (LA) and 5-hydroxymethylfurfural (HMF), was accounting for a minority part of the product during the reaction process. According to the distribution of products, a reaction pathway for the extremely low sulfuric acid catalyzed conversion of glucose in ethanol/n-hexane medium was proposed. © 2015, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.


Zhao S.,Zhengzhou University | Xu G.,Henan Agricultural University | Chang J.,Zhengzhou University | Chang C.,Zhengzhou University | And 6 more authors.
BioResources | Year: 2015

A series of supported phosphotungstic acid (H3PW12O40, HPW) catalysts, including HPW/β, HPW/Sn-β, HPW/H-Y, HPW/H-ZSM-5, HPW/USY, HPW/ReUSY, and HPW/SBA-15, were prepared using an impregnation method for alcoholysis of fructose to ethyl levulinate in ethanol. Among these catalysts, HPW/H-ZSM-5 showed the highest catalytic activity, and the yield of ethyl levulinate from fructose increased with increasing phosphotungstic acid loading. The yield of ethyl levulinate reached 43.1% at 160 °C for 2 h over 20 wt.% HPW/H-ZSM-5, and the solid catalyst could be reused at least three times. EL yields of 19.1%, 27.3%, 37.4%, and 8.7% could be obtained from glucose, sucrose, inulin, and cellulose, respectively. Furthermore, the catalysts were characterized by BET surface area, X-ray diffraction, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. HPW/H-ZSM-5 showed good catalytic activity for the direct production of ethyl levulinate from fructose.


Kong P.-F.,Zhengzhou University | Xu G.-Z.,Henan Agricultural University | Chang C.,Zhengzhou University | Chang C.,Engineering Laboratory of Henan Province for Biorefinery Technology and Equipment | And 5 more authors.
Xiandai Huagong/Modern Chemical Industry | Year: 2015

The development of producing liquid fuels by direct conversion of biomass in alcohol medium in recent years is presented. The related factors affecting this technology are pointed out. Some suggestions for its research development in the future are also proposed, including enhancing the research and development of the related technology and promoting the comprehensive utilization of biomass. ©, 2015, China National Chemical Information Center. All right reserved.

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