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Study for entrained-flow gasifier modeling and measurement

Zhe WANG, Zheng LI, Fen HE

《化学科学与工程前沿（英文）》 2010年第4卷第4期页码 400-403 doi: 10.1007/s11705-010-0510-0

摘要： The syngas composition change during the measurement process was analyzed using a detailed gas phase reaction mechanism. Results showed that the measurement error induced by the temperature and pressure change in the measurement process cannot be ignored. Based on the results, suggestions were proposed for syngas concentration measurement and temperature measurement.

关键词： entrained-flow gasifier syngas composition

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Syngas composition study

Zhe WANG , Jinning YANG , Zheng LI , Yong XIANG ,

《能源前沿（英文）》 2009年第3卷第3期页码 369-372 doi: 10.1007/s11708-009-0044-7

摘要： The syngas composition characteristic was investigated in the real slurry-feed gasifier using a detailed gas phase reaction mechanism. The results show that the time for syngas to reach equilibrium is much shorter than the residence time for slurry feed entrained-flow gasifiers, indicating a gas phase species partial equilibrium state. Further calculation shows that the four major species, CO, CO, H, and HO, are in equilibrium via the reaction Bayu PRABOWO,Herri SUSANTO,Kentaro UMEKI,Mi YAN,Kunio YOSHIKAWA. [J]. Front. Energy, 2015, 9(3): 362-370.Ashok Jayawant Rao KECHE, Gaddale AMBA PRASAD RAO. [J]. Front Energ, 2013, 7(3): 300-306.Souman RUDRA, H. T. KIM, Jinwook LEE, L. ROSENDAHL, . [J]. Front. Energy, 2010, 4(3): 402-413. Fuchen WANG , Xinwen ZHOU , Wenyuan GUO , Zhenghua DAI , Xin GONG , Haifeng LIU , Zunhong YU , . [J]. Front. Energy, 2009, 3(1): 117-122.

关键词： entrained-flow gasifier syngas

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Experimental evaluation of a 35 kVA downdraft gasifier

Ashok Jayawant Rao KECHE, Gaddale AMBA PRASAD RAO

《能源前沿（英文）》 2013年第7卷第3期页码 300-306 doi: 10.1007/s11708-013-0247-9

摘要： Energy conversion systems based on biomass are particularly interesting because biomass utilization effectively closes the carbon cycle besides achieving self-sustainability. Biomass is particularly useful for highly populated and agriculture dependent economic nations like China and India. A compact and cost effective downdraft gasification system was developed. The present paper describes an experimental investigation on a biomass based gasifier engine system with a capacity of 35 kVA for power generation application. The problem of cooling and cleaning the hot and dirty gas from the gasifier has been satisfactorily solved by the effective cooling and filtration system. The gasifier developed is observed to be operation friendly. The quality of gas was evaluated in terms of its composition, conversion efficiency and total particulate matter. The maximum output of the power plant was obtained at the combustion zone temperature of 850oC. The experimental investigations showed that the percentage reduction in total particulate matter is 89.32%. The conversion efficiency of the biomass gasifier is found to be dependent on the operation conditions and fuel properties of the gasifier. The optimum value of equivalence ratio was observed to be 0.3134 for achieving the maximum gas conversion efficiency of the present gasifier configuration.

关键词： biomass gasification producer gas equivalence ratio total particulate matter conversion efficiency of gasifier

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Pilot scale autothermal gasification of coconut shell with CO

Bayu PRABOWO,Herri SUSANTO,Kentaro UMEKI,Mi YAN,Kunio YOSHIKAWA

《能源前沿（英文）》 2015年第9卷第3期页码 362-370 doi: 10.1007/s11708-015-0375-5

摘要： This paper explored the feasibility and benefit of CO utilization as gasifying agent in the autothermal gasification process. The effects of CO injection on reaction temperature and producer gas composition were examined in a pilot scale downdraft gasifier by varying the CO /C ratio from 0.6 to 1.6. O was injected at an equivalence ratio of approximately 0.33–0.38 for supplying heat through partial combustion. The results were also compared with those of air gasification. In general, the increase in CO injection resulted in the shift of combustion zone to the downstream of the gasifier. However, compared with that of air gasification, the long and distributed high temperature zones were obtained in CO -O gasification with a CO /C ratio of 0.6–1.2. The progress of the expected CO to CO conversion can be implied from the relatively insignificant decrease in CO fraction as the CO /C ratio increased. The producer gas heating value of CO -O gasification was consistently higher than that of air gasification. These results show the potential of CO -O gasification for producing high quality producer gas in an efficient manner, and the necessity for more work to deeply imply the observation.

关键词： biomass gasification CO₂ downdraft gasifier autothermal