Chen L.,Fujian Normal University |
Li X.,Fujian Normal University |
Li X.,Putian University |
Wang M.,Fujian Normal University |
And 4 more authors.
Journal of Applied Phycology | Year: 2016
This study aimed to culture the green alga Acutodesmus obliquus utilizing the gaseous emissions containing a high concentration of CO2 (99.13 %) from a methanol plant and study the tolerance of microalgae. The effect of CO2 concentration, aeration rate, inoculum concentration, intermittent sparging, and nitrogen sources on the growth of A. obliquus was examined. Acutodesmus obliquus also was cultivated in a 500-L pilot outdoor tubular photobioreactor (OTP) to advance the laboratory scale system to outdoor scale-up applications. The results showed that A. obliquus could tolerate high CO2 concentrations of 50 %, and a maximum biomass of 0.935 g L−1 (dry weight) was achieved at 20 % CO2. An aeration rate of 500 mL min−1, inoculum concentration (optical density at 680 nm [OD680] = 0.3), and intermittent sparging of 10 min per 2 h enhanced growth to the optimum and influenced culture pH and photosynthesis. Urea as a nitrogen source was shown to be more beneficial to cell growth. A urea concentration of 0.3 g L−1 and an N/P ratio of 15 led to maximum biomass accumulation thus enhancing the gaseous emission utilization efficiency. In conclusion, this work demonstrated that gaseous emissions containing high concentration of CO2 from a methanol plant could be directly introduced into A. obliquus cultures and that A. obliquus was suitable well for large-scale outdoor cultivation in a tubular photobiorecator. © 2016 Springer Science+Business Media Dordrecht
Hu Z.-G.,Jiangsu SOPO Group Co. |
Li J.-W.,Dalian National Laboratory for Clean Energy |
Chen W.-M.,Dalian National Laboratory for Clean Energy |
Shao S.-Y.,Jiangsu SOPO Group Co. |
And 2 more authors.
Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology | Year: 2015
Silica was treated with trimethylchlorosilane before using as the supports for Rh-Mn-Li catalysts in CO hydrogenation to C2 oxygenates. The catalysts were characterized by infrared spectroscopy, N2 adsorption-desorption, C content measurements, transmission electron microscopy, H2 temperature programmed reduction, and temperature programmed surface reaction. The results showed that the silanization degree has little effect on the textural properties of silica. The mean Rh particle size (about 3 nm), CO adsorption state on Rh and reducibility of Rh supported on silica remain unchanged by the silanization of silica support. However, with an increase of the silanization degree of silica, the ability of Rh to dissociate CO is improved, which can enhance the catalytic activity of Rh-Mn-Li/SiO2 in CO hydrogenation but has little influence on the selectivity towards C2 oxygenates. © 2015, Science Press. All right reserved.
Chen W.,CAS Dalian Institute of Chemical Physics |
Ling C.,Jiangsu SOPO Group Co. |
Ding Y.,CAS Dalian Institute of Chemical Physics |
Wang T.,CAS Dalian Institute of Chemical Physics |
And 2 more authors.
Shiyou Huagong/Petrochemical Technology | Year: 2013
A series of Cu-ZnO/SiO2 catalysts were prepared by sol-gel method and characterized by means of N2 adsorption-desorption, XRD and XRF. The effects of pretreatment with NH3·H2O and the addition of polyethylene glycoll (PEG) on the structural properties of the prepared samples and their catalytic performances in the hydrogenolysis of methyl acetate were investigated. The results show that the pretreatment increases the specific surface areas of the samples and the addition of PEG increases their pore volume and pore size with the narrow distribution, which improves the dispersion of CuO. All the Cu-ZnO/SiO2catalysts prepared by sol-gel method displayed high activity and selectivity to ethanol in the hydrogenolysis. The conversion of methyl acetate and selectivity to ethanol reached 98.5% and 96.2%, respectively under the conditions of 250°C, 7.0 MPa, n(H2):n(methyl acetate) 10 and LHSV 0.50 h-1. And their catalytic performances remained unchanged after running 430 h. The catalysts can be used under low pressure.
Shao S.,East China University of Science and Technology |
Shao S.,Jiangsu Sopo Group Co. |
Chen X.,East China University of Science and Technology |
Liu H.,East China University of Science and Technology |
Wang F.,East China University of Science and Technology
Energy Sources, Part A: Recovery, Utilization and Environmental Effects | Year: 2012
The feasibility of substituting alcohol fermentation wastewater of maize and cassava for water to prepare coal slurries was explored. The rheological and stability properties of coal alcohol fermentation wastewater slurries were studied and compared with that of coal water slurry. The results showed that both coal maize and cassava alcohol fermentation wastewater slurries exhibited shear-thinning behavior. Because of the oxygen-containing functional groups (carboxylic) with exchangeable cations in alcohol fermentation wastewater and its low pH value, coal maize and cassava alcohol fermentation wastewater slurries exhibited the higher apparent viscosities, the stronger shear-thinning behavior, and worse stabilities compared with the coal water slurry. In addition, alcohol fermentation wastewater should be diluted for preparing coal slurries to meet industrial need in apparent viscosity and solid concentration at the same time. © 2012 Copyright Taylor and Francis Group, LLC.
Ling C.,Jiangsu Sopo Corporation Group Ltd |
Huang Z.,CAS Institute of Chemistry
Chemistry Bulletin / Huaxue Tongbao | Year: 2013
Rhodium was used to catalyze the carbonylation of ethyl acetate with carbon monoxide to propionic acid. The effect of iodide additives and reaction conditions on yield of propionic acid was studied. Because of avoiding the esterification and intermolecular dehydration of ethanol the yield of propionic acid was improved significantly. The kinetic behavior of ethyl acetate carbonylation was similar with methanol carbonylation. The reaction rate and propionic acid selectivity were increased obviously with the introduction of iodide additives. The propionic acid yield is greater than 95% under the optimum conditions.
Qian Q.,CAS Beijing National Laboratory for Molecular |
Shao S.,Jiangsu Sopo Corporation Group Ltd. |
Yan F.,CAS Beijing National Laboratory for Molecular |
Ling C.,Jiangsu Sopo Corporation Group Ltd. |
And 3 more authors.
Russian Journal of Physical Chemistry A | Year: 2012
Ag nanoparticles (AgNPs) were used as adsorbent to remove trace iodide from acetic acid. Under identical conditions, AgNPs adsorbent with 0.5 wt % Ag has the same performance as commercial adsorbent with 10 wt % Ag +. In addition, Ag loss of AgNPs adsorbent is remarkably lower than that of commercial adsorbent. The Ag content in AgNPs adsorbent affects its adsorption performance, and the optimal content is 1.0 wt %. Saturated AgNPs adsorbent can be regenerated by hydrogen reduction and reused with satisfying performance. The properties of AgNPs adsorbent are based on surface effect of nanoparticles, differing from commercial Ag + type adsorbents. In a word, AgNPs adsorbent is of high efficiency, low Ag loss and easy recycling, thus making it "green adsorbent" for removing iodide from acetic acid. © 2012 Pleiades Publishing, Ltd.
Xu B.,Jiangsu Sopo Group Co. |
Chen B.,CAS Institute of Chemistry |
Huang Z.,CAS Institute of Chemistry |
Lu T.,CAS Institute of Chemistry
Chemistry Bulletin / Huaxue Tongbao | Year: 2013
TiO2-ZrO2 composite oxide support was prepared by Sol-gel method. Pt/TiO2-ZrO2 and Pt-M/TiO2-ZrO2 (M=Re, Sn or In) catalysts were prepared by the impregnation method and characterized by X-ray powder diffraction and X-ray photoelectron spectroscopy. Their catalytic performance in the liquid phase hydrogenation of furfural was investigated. The results showed that the electronic structure of the catalysts have been changed after introducing electropositive metal compared with single metal catalyst. These effects enhanced the catalytic performance of bimetal catalysts in this reaction. The order of increase in catalytic activity is consistent with the order of electonegativity of electropositive metal, which both are Re ≤ Sn ≤ In. Among them, the best catalyst was obtained by additing Re, the conversion of furfural is 100% and the selectivity of furfuryl alcohol is 95.7%.