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	1. The effect of the pH value of the anodic solution on the transmembrane transport of oxygen in microbial fuel cells
	HUANG Dong,YAO Sen,SONG Bingye,HE Yaling
	Energy Science and Technology 10 May 2016
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	Abstract:In this paper, a molecular dynamic model is established to describe the transfer of oxygen in the cathode chamber through the Nafion membrane to the anode chamber of MFCs. The effect of the pH values of the anodic solution on the diffusion process is studied and the diffusion coefficient are calculated either. The law of oxygen transmembrane transport predicted by simulations is validated by experiments. The results of molecular dynamic simulations show that the diffusion coefficient of oxygen molecules increases sharply with the decrease of the pH value of the MFCs anodic solution. It appears that the lower the pH value is, the more easily the oxygen diffuses into the anode chamber. This conclusion is coherent with experimental results. The diffusion coefficient of hydronium ions is almost unchanged after the rise at first with the decrease of the pH value and has the saturation because of the limitation of the Nafion membrane ion exchange capacity. The radial distribution function analysis shows that the main factors affecting the oxygen molecules transmembrane diffusion are the free volume and motion of Nafion side chains.
	TO cite this article:HUANG Dong,YAO Sen,SONG Bingye, et al. The effect of the pH value of the anodic solution on the transmembrane transport of oxygen in microbial fuel cells[OL].[10 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4687878


	2. Property improvement of bio-oil by ultra-high pressure processing
	HE Ronghai,YE Xiaofei,MA Haile
	Energy Science and Technology 27 November 2012
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	Abstract:Bio-oils produced from fast pyrolysis need to be upgraded before application as fuel due to their poor physicochemical properties. In this submission, we probed the potential of continuous ultra-high pressure processing (high pressure homogenization (HPH)) technique in improving physicochemical properties of switchgrass bio-oil. The homogenization pressures for different bio-oil samples were 100, 150, 200, 250, and 300MPa, respectively. The results showed that viscosity of switchgrass bio-oil decreased remarkably to 70% of the original value after homogenization treatment at pressure of 100MPa, and it didn't significantly change when homogenization pressure continued to increase; solid content significantly decreased, and water content, heating value, density, pH value, and ash content of switchgrass bio-oil did not change after HPH. The average molecular weight of switchgrass bio-oil was proved to appreciably decrease after homogenization. And the oil's chemical composition changed. HPH processing remarkably improved switchgrass bio-oil stability. Economic calculation demonstrated the operation cost was only 1.07 US cents/L for bio-oil HPH processing at 100MPa.
	TO cite this article:HE Ronghai,YE Xiaofei,MA Haile. Property improvement of bio-oil by ultra-high pressure processing[OL].[27 November 2012] http://en.paper.edu.cn/en_releasepaper/content/4498184


	3. Fast Analysis of Bio-oil Properties by Fourier Transform Infrared Spectroscopy
	HE Ronghai,YE Xiaofei,LIU Lu
	Energy Science and Technology 27 November 2012
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	Abstract:Over 400 organic compounds exist in bio-oil, and the analysis of bio-oil physicochemical properties is tedious, time-consuming, and expensive. This study investigated the feasibility of using Fourier Transform Infrared Attenuated Total Reflection (FTIR-ATR) in rapid analysis of bio-oil by using pre-processing technique and principal component analysis (PCA) method to obtain multiple physical and chemical properties of bio-oil. Switchgrass bio-oil samples produced under nine different pyrolysis conditions were used. Pearson correlation analysis shows strong relationship between chemical compounds and between some physical properties. PCA method can well separate bio-oil samples based on their physicochemical properties. Second derivative spectra pretreatment can remarkably eliminate physical effects of bio-oil FTIR spectra, and PCA score plot shows the discrimination in different bio-oil samples. Such a rapid analysis would lead to better quality control in bio-oil production and allow insight for bio-oil upgrading.
	TO cite this article:HE Ronghai,YE Xiaofei,LIU Lu. Fast Analysis of Bio-oil Properties by Fourier Transform Infrared Spectroscopy[OL].[27 November 2012] http://en.paper.edu.cn/en_releasepaper/content/4498187


	4. The method to Evaluate Energy Value of Biofuel
	huang weidong,wu chundu,xia weidong,lili ding,shen xiansheng
	Energy Science and Technology 22 May 2008
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	Abstract:Present evaluation of biofuel gives little positive to negative net energy value of corn ethanol. It caused a lot of debates about the energy return on investment of ethanol. We redefine and evaluate Net Energy Value (NEV) of bioethanol, based on the energy input data in literature after changing the usage of the unfermented residue to simulate the future which maximizes the energy value of the biomass; and the energy is sorted as fuel, heat and electricity to solve the quality difference of input energy. We estimate NEV from 14 studies about bioethanol and petroleum. The results show that the net energy value for all bioethanol is very positive and not greatly influenced by single factor, but increase at low ethanol yield of biomass. It supports to develop biofuel for our energy and environmental goals and indicates that the net energy yield of unit land is very important parameter to evaluate the biofuel. We should develop a crop with high net energy yield of unit land to decrease land demand for energy production, and the crop can grow in agricultural marginal land with little or no fertilizer without competing with food production.
	TO cite this article:huang weidong,wu chundu,xia weidong, et al. The method to Evaluate Energy Value of Biofuel[OL].[22 May 2008] http://en.paper.edu.cn/en_releasepaper/content/21651


	5. Sustainable bioenergy from integrated biomass production and conversion process
	huang　weidong ,xia　weidong ,ye　taohong
	Energy Science and Technology 05 December 2007
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	Abstract:An integrated biomass production and conversion process is proposed wherein water floating plant grows in greenhouse and digested to biogas, biogas is used for power generation, undigested residue is used as fertilizer for biomass production as well as CO2. Modeling the processes with water hyacinth in tropic area demonstrates several major advantages of the integrated process. (1) The land area needed to grow the biomass to replace fossil fuel for present world power generation is only about 600000 km2, 0.4% land area of the world. (2) A close cycle of nutrient solves the fertilizer supply for biomass production and waste treatment for biomass conversion. (3) Nearly no pollution and greenhouse gas emit out to harm environment and global climate, and about 40% greenhouse gas will be reduced using the processes to replace all fossil fuel for power generation. (4) The proposed process can be applied in agriculturally marginal land.
	TO cite this article:huang　weidong ,xia　weidong ,ye　taohong . Sustainable bioenergy from integrated biomass production and conversion process[OL].[ 5 December 2007] http://en.paper.edu.cn/en_releasepaper/content/16744

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