Hydrogen-rich gas production by steam gasification of char derived from cyanobacterial blooms (CDCB) in a fixed-bed reactor: Influence of particle size and residence time on gas yield and syngas composition

2010 ◽  
Vol 35 (19) ◽  
pp. 10212-10217 ◽  
Author(s):  
Feng Yan ◽  
Leguan Zhang ◽  
Zhiquan Hu ◽  
Gong Cheng ◽  
Chengcheng Jiang ◽  
...  
Keyword(s):  
Particle Size ◽  
Residence Time ◽  
Fixed Bed ◽  
Gas Production ◽  
Steam Gasification ◽  
Fixed Bed Reactor ◽  
Cyanobacterial Blooms

Catalytic steam gasification of pig compost for hydrogen-rich gas production in a fixed bed reactor

2013 ◽  
Vol 133 ◽  
pp. 127-133 ◽  
Author(s):  
Jingbo Wang ◽  
Bo Xiao ◽  
Shiming Liu ◽  
Zhiquan Hu ◽  
Piwen He ◽  
...  
Keyword(s):  
Fixed Bed ◽  
Gas Production ◽  
Steam Gasification ◽  
Fixed Bed Reactor

K2CO3-Catalyzed Steam Gasification of Indonesian Low-Rank Coal for H2-Rich Gas Production in a Fixed Bed Reactor

2015 ◽  
Vol 3 (5) ◽  
pp. 527-534 ◽  
Author(s):  
XiangZhou Yuan ◽  
Hueon Namkung ◽  
Tae-Jin Kang ◽  
Hyung-Taek Kim
Keyword(s):  
Fixed Bed ◽  
Gas Production ◽  
Steam Gasification ◽  
Fixed Bed Reactor ◽  
Low Rank ◽  
Low Rank Coal

Steam Gasification of Biochar Derived from Fast Pyrolysis for Hydrogen-Rich Gas Production

2013 ◽  
Vol 830 ◽  
pp. 477-480 ◽  
Author(s):  
Wei Qing Zeng ◽  
Ling Jun Zhu ◽  
Qi Wang
Keyword(s):  
Carbon Number ◽  
Fast Pyrolysis ◽  
Fixed Bed ◽  
Gas Production ◽  
Steam Gasification ◽  
Fixed Bed Reactor ◽  
Hydrogen Yield ◽  
Low Carbon ◽  
Production Of Hydrogen ◽  
Pyrolysis Of Biomass

Steam gasification of biochar from fast pyrolysis of biomass was conducted in a fixed bed reactor. The experiments were carried out at temperature of 700, 750, 800 °C with steam flow rate of 0.1 g/min and reaction time of 3 h. The gas products mainly included H2, CO, CO2and some hydrocarbons with low carbon number. The results showed that the conversion of biochar at 700, 750, 800 °C was 68, 78, 96 wt%, respectively, and high gasification temperature favored the production of hydrogen-rich gases. The hydrogen yield increased with temperature rising and reached the maximum of 35.70 mol/kg with a hydrogen concentration of 74 V% at 800 °C.

scholarly journals Pyrolysis of Coconut Shell: An Experimental Investigation

2009 ◽  
Vol 6 (2) ◽  
pp. 33 ◽  
Author(s):  
E. Ganapathy Sundaram ◽  
E. Natarajan
Keyword(s):  
Particle Size ◽  
Heating Rate ◽  
Residence Time ◽  
Pyrolysis Temperature ◽  
Fixed Bed ◽  
Pyrolysis Product ◽  
Fixed Bed Reactor ◽  
Coconut Shell ◽  
Process Conditions ◽  
Liquid Yield

 Fixed-bed slow pyrolysis experiments of coconut shell have been conducted to determine the effect of pyrolysis temperature, heating rate and particle size on the pyrolysis product yields. The effect of vapour residence time on the pyrolysis yield was also investigated by varying the reactor length. Pyrolysis experiments were performed at pyrolysis temperature between 400 and 600°C with a constant heating rate of 60°C/min and particle sizes of 1.18-1.80 mm. The optimum process conditions for maximizing the liquid yield from the coconut shell pyrolysis in a fixed bed reactor were also identified. The highest liquid yield was obtained at a pyrolysis temperature of 550 °C, particle size of 1.18-1.80 mm, with a heating rate of 60 °C/min in a 200 mm length reactor. The yield of obtained char, liquid and gas was 22-31 wt%, 38-44 wt% and 30-33 wt% respectively at different pyrolysis conditions. The results indicate that the effects of pyrolysis temperature and particle size on the pyrolysis yield are more significant than that of heating rate and residence time. The various characteristics of pyrolysis oil obtained under the optimum conditions for maximum liquid yield were identified on the basis of standard test methods. 

Steam Gasification of Catalytic Pyrolysis Char for Hydrogen-Rich Gas Production

2013 ◽  
Vol 316-317 ◽  
pp. 105-108
Author(s):  
Wu Xing Sun ◽  
Yan Zhou ◽  
Qi Wang ◽  
Shu Rong Wang
Keyword(s):  
Atmospheric Pressure ◽  
Catalytic Pyrolysis ◽  
Fixed Bed ◽  
Gas Production ◽  
Steam Gasification ◽  
Fixed Bed Reactor ◽  
Bed Temperature ◽  
Production Of Hydrogen ◽  
Pyrolysis Of Biomass ◽  
Gasification Temperature

Steam gasification of biochar from catalytic pyrolysis of biomass was studied in a fixed bed reactor at atmospheric pressure. The experiments were carried out at bed temperature of 700, 750, 800 °C at steam flow rate of 0.1 g/min with reaction time of 3h. The gases produced included mainly H2, CO, CO2 and some small molecular hydrocarbons. The results showed that high gasification temperature was favorable for the production of hydrogen-rich gases. The maximum concentration of hydrogen exceeded 85% at 800 °C and the total gas yield increased with temperature rising. Meanwhile, the conversion efficiency of biochar at 700, 750, 800 °C was 48%, 60%, 72% respectively.

Influence of Particle Size and Temperature on Gasification Performance

2011 ◽  
Vol 281 ◽  
pp. 78-83 ◽  
Author(s):  
Yu Feng ◽  
Bo Xiao ◽  
Klaus Goerner ◽  
Ravi Naidu
Keyword(s):  
Particle Size ◽  
Fixed Bed ◽  
Steam Gasification ◽  
Fixed Bed Reactor ◽  
Temperature Level ◽  
Experimental Conditions ◽  
Temperature Range ◽  
Product Composition ◽  
Higher Temperature ◽  
Reactor Temperature

In the present study the catalytic steam gasification of biomass to produce hydrogen-rich gas with calcined dolomite as catalyst in an externally heated fixed bed reactor was investigated. The influence of the reactor temperature and particle size on yield and product composition was studied at the temperature range of 700°C-900°C. Over the ranges of experimental conditions examined, tar was completely decomposed as temperature increases from 800°C to 900°C. Higher temperature and smaller particle size resulted in more H2 and CO2 production, and dry gas yield. The highest H2 content of 58.27 V%, and the highest H2 yield of 2.23 Nm3/ kg biomass were observed at the highest temperature level of 900°C when the particle size was below 0.125mm.

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