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Liguo Y.,Key Laboratory for Biomass Gasification Technology of Shandong Province | Xiaoxu F.,Key Laboratory for Biomass Gasification Technology of Shandong Province | Yufeng D.,Nanjing Southeast University | Yunjun W.,Nanjing Southeast University
Proceedings of the 2013 3rd International Conference on Intelligent System Design and Engineering Applications, ISDEA 2013 | Year: 2013

The standard Ontario Hydro Method (OHM) was used into the flue gas mercury sampling before and after fabric filter (FF)/ electrostatic precipitator (ESP) locations in coal-fired power stations in China, and then various mercury speciation, Hg0, Hg2+ and HgP in flue gas, were analyzed by using EPA method. The solid sample, such as coal, bottom ash and ESP ash, were analyzed by DMA 80, based on EPA Method 7473. According to mercury balance, mercury speciation and its distribution in different locations downstream the flue gas were obtained. The mercury removal efficiency of coal-fired power plants installed FF is more than 20% and 80% respectively. While the mercury removal efficiency of coal-fired power plants installed ESP is around 7%, 20% and 4% respectively. The concentrations of chlorine and sulfur in coal, NO x, SO2, HCl and Cl2 in flue gas have positive correlation with formation of the oxidized mercury. © 2012 IEEE.


Guan H.,Shandong Academy of Sciences | Sun R.,Shandong Academy of Sciences | Yan G.,Shandong Academy of Sciences | Yan G.,Shandong University | And 3 more authors.
Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery | Year: 2010

Definition and characteristics of distributed combined cooling, heating and power system (CCHP) were briefly summarized. The principle of biomass gasification system was mainly introduced, and several application modes of CCHP based on biomass gasification (BGCCHP) were discussed. At last, the advantages and difficulties of developing BGCCHP in China were analyzed. BGCCHP could realize the cascade utilization of energy coming along with social, economic and environmental benefits and it is an efficient and comprehensive way for biomass resource exploitation and application.


Yan G.,Shandong Academy of Sciences | Sun R.,Shandong Academy of Sciences | Xu M.,Shandong Academy of Sciences | Guan H.,Shandong Academy of Sciences | And 2 more authors.
Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery | Year: 2010

A novel and efficient low-tar gasification technology was put forward based on the mechanics of tar generation and pyrolysis. This technology contains such two separate sub-process as pyrolysis occurring between 350°C and 500°C, and gasification reacting in the high temperature condition about 1000°C. The high-temperature gasification ensures the tar pyrolyze into small molecule non-condensable gases with the equivalence ratio of gasification agent about 0.3. As a result, the quality of biogas is highly improved and the mass concentration of original tar in the biogas is significantly reduced below 20mg/m3.


Yan G.-H.,Shandong University | Yan G.-H.,Shandong Academy of Sciences | Sun L.,Shandong Academy of Sciences | Sun F.-Z.,Shandong University | And 3 more authors.
Ranshao Kexue Yu Jishu/Journal of Combustion Science and Technology | Year: 2010

Distribution properties of pyrolysis products of corn stalk and rice husks under different reaction temperature and residence time were studied. The experiments prove that the mass ratio of liquid products was nearly 50% at 400°C. With the increase of reaction temperature, hydrocarbons further crack into small-molecule gases, and the ratio of permanent gases was above 55% at 800°C. The results show that the reaction temperature which is closely related to the compositions of permanent gases has a greater influence on pyrolysis products than residence time. With the increase of reaction temperature, the volume content of H2 rises sharply, while those of CO and CO2 both decrease obviously. Meanwhile, the volume content of CH4 increases slightly, especially when the temperature is lower than 500°C. And the highest volume content of light hydrocarbons achieves at about 500°C. As reaction temperature rises from 400°C to 500°C, the low heat value (LHV) of permanent gases increases from 11 MJ/m3 to 15 MJ/m3. When the temperature exceeds 500°C, the LHV of permanent gases changes gently within the range of 15-16.5 MJ/m3.


Zhao Y.X.,Shandong Academy of Sciences | Zhao Y.X.,Key Laboratory for Biomass Gasification Technology of Shandong Province | Gao M.T.,Shandong Academy of Sciences | Gao M.T.,Key Laboratory for Biomass Gasification Technology of Shandong Province | And 4 more authors.
Advanced Materials Research | Year: 2014

In this study the effect of Ce3+ on activated sludge granulation were first studied. It was found that 50 mg/l Ce3+ significantly promotes the granulation of activated sludge and more compacted smaller aerobic granules are formed. Additional Ce3+ has no influences on COD removal efficiency, but improved the SOP removal efficiency significantly. Although protein contents in extracellular polymeric substances increased along with granulation in both reactors, protein content in EPS of Ce3+-fed granules was higher than that without Ce3+ addition. Polysaccharide contents in extracellular polymeric substances decreased slightly through the experiment in the two reactors. Scanning electron microscopy showed that bacilli and cocci were dominant on surface of granules in both reactors. But there were more and longer rod-shaped bacteria on surface of Ce3+-fed granules. © (2014) Trans Tech Publications, Switzerland.


Yan G.,Shandong Academy of Sciences | Xu M.,Shandong Academy of Sciences | Xu C.,Shandong Academy of Sciences | Xiao Q.,Shandong Academy of Sciences | Sun R.,Key Laboratory for Biomass Gasification Technology of Shandong Province
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2013

Tar is a kind of very harmful product during the biomass gasification process, and it is not considered in the conventional thermodynamic mathematical model because of its components complexity. In order to research the effect of operation condition on ingredients and tar content of the fuel gas, a thermodynamic mathematical model of biomass gasification process with tar was developed based on material balance, energy balance and chemical equilibrium, taking the influences of system heat loss and carbon partial conversion into account. It is well known that the number of identified tar components is more than 100, and the components of quality ratio more than 5% are benzene, toluene, phenol, dimethylbenzene, phenylethylene, naphthalene, and so on. According to the quality equal principle of the main tar components, tar was indicated as the imaginary material C6H6.2O0.2 in the thermodynamic mathematical model. The chemical reactions selected in the model were from the deoxidization process as the reaction rate was much slower than the oxidization reaction. The model was solved with Newton-Raphson method, which was validated in comparison with literature data. In addition, the developed model was used to study the operating conditions, such as air preheating temperature, air equivalence ratio (ER) and steam ratio, on gas components and tar content. The results indicated that, with the increase in air preheating temperature, the tar content was decreased but the low heat value (LHV) was increased. When ER was increased from 0.2 to 0.3, the tar content and the LHV were both decreased. As steam ratio was increased from 0 to 10%, the tar content was decreased and gasification efficiency was improved. The results might provide valuable references for low-tar and clean utilizations of biomass gasification.


Wang K.,Shandong Academy of Sciences | Wang K.,Key Laboratory for Biomass Gasification Technology of Shandong Province | Jiang J.G.,Shandong Academy of Sciences | Sun R.F.,Shandong Academy of Sciences
Advanced Materials Research | Year: 2014

The pyrolysis characteristics for two types biomass material was tested at 230°~250°, and the pyrolysis product component was on-line analyzed by using moisture micro-detection teller, gas chromatograph-mass spectrometer computer and fourier transform infrared spectroscopy. Besides, two different algorithms were used to evaluate the test error. In addition, the generated tar gas was secondary decomposed at 800°. It is found that the tar was broken up completely, which increased the hydrogen content sharply in the pyrolysis gas. The test data shows that the heat value of cotton stalk improves better than that of the corn stalk after pyrolysis, so it is more suitable for cotton stalk than corn stalk to improve the value in use by means of low temperature pyrolysis technology. © (2014) Trans Tech Publications, Switzerland.


Fan X.,Key Laboratory for Biomass Gasification Technology of Shandong Province | Xian J.,North China Electrical Power University | Chu L.,Key Laboratory for Biomass Gasification Technology of Shandong Province | Yang L.,Key Laboratory for Biomass Gasification Technology of Shandong Province
Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery | Year: 2011

The results from biomass gasification in a pilot-scale (6 m tall×0.2 m internal diameter) air-blown circulating fluidized bed gasifier was tested and compared with bubbling fluidized bed gasifier. The results showed that the diameters of bed material in bubbling fluidized bed and circulating fluidized bed were different. The bubbling fluidized bed had a dense zone and bed material was homogeneous distribution in circulating fluidized bed. The temperature of the circulating fluidized bed was more uniform than bubbling fluidized bed. The carbon conversion rate, gasification efficiency and low gas heat value of circulating fluidized bed were larger than that of bubbling fluidized bed gasifier.


Chu L.,Key Laboratory for Biomass Gasification Technology of Shandong Province | Fan X.,Key Laboratory for Biomass Gasification Technology of Shandong Province | Xiao Q.,Key Laboratory for Biomass Gasification Technology of Shandong Province | Guo D.,Key Laboratory for Biomass Gasification Technology of Shandong Province | Xian J.,North China Electrical Power University
Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery | Year: 2010

Energy balance analysis and calculations were made for two common kinds of biomass. It was proved that the heat of fixed carbon combustion was sufficient for volatile pyrolysis. The pressure distribution for cold cases in the dual fluidized bed was obtained by cold experiments. Finally, during the experiments of pellet gasification in dual fluidized bed, combustion conditions were able to be smoothly switched to gasification conditions with stable operation, and the calorific value of gas was able to reach 7MJ/Nm3.


Jiang B.,Key Laboratory for Biomass Gasification Technology of Shandong Province | Zhang X.,Key Laboratory for Biomass Gasification Technology of Shandong Province | Sun L.,Key Laboratory for Biomass Gasification Technology of Shandong Province | Xu M.,Key Laboratory for Biomass Gasification Technology of Shandong Province
Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery | Year: 2010

The preparation of biodiesel using microwave has received wide attention recently, and is summarized in terms of heterogeneous acid and basic catalysis transesterification. The heterogeneous catalyst process of biodiesel promoted by microwave has the advantages of rapid reaction, energy saving and environmental amity, and the resulting product is easy to separate from byproduct. Solid acid and base were selected as catalysts in the research. The transesterification reaction was finished in 10-30 min when promoted by microwave, and the conversion of transesterification reaction was comparable to or higher than that by traditional heating method. These catalysts can be reused several times.

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