06/00846 Effect of pyrolysis pressure and heating rate on radiata pine char structure and apparent gasification reactivity

2006 ◽  
Vol 47 (2) ◽  
pp. 125
Keyword(s):  
Heating Rate ◽  
Radiata Pine ◽  
Gasification Reactivity ◽  
Char Structure

Impacts of CO2 on char structure and the gasification reactivity

2017 ◽  
Vol 128 ◽  
pp. 13-17 ◽  
Author(s):  
Shenghua Zhu ◽  
Yonghui Bai ◽  
Kang Luo ◽  
Chenghao Hao ◽  
Weiren Bao ◽  
...  
Keyword(s):  
Gasification Reactivity ◽  
Char Structure

Gasification reactivity of char with CO2 at elevated temperatures: the effect of heating rate during pyrolysis

2010 ◽  
Vol 6 (6) ◽  
pp. 905-911 ◽  
Author(s):  
Hao Liu ◽  
He Zhu ◽  
Liye Yan ◽  
Yongjun Huang ◽  
Shigeru Kato ◽  
...  
Keyword(s):  
Heating Rate ◽  
Elevated Temperatures ◽  
Gasification Reactivity

scholarly journals Influence of Heating Rate during Pyrolysis on Gasification Reactivity of Coal Chars at High Temperatures.

2000 ◽  
Vol 79 (11) ◽  
pp. 1078-1087 ◽  
Author(s):  
Chunhua LUO ◽  
Makoto NAKAMURA ◽  
Masaomi TOYODA ◽  
Shigeyuki UEMIYA ◽  
Toshinori KOJIMA
Keyword(s):  
Heating Rate ◽  
High Temperatures ◽  
Gasification Reactivity

Effects of biomass char structure on its gasification reactivity

2010 ◽  
Vol 101 (20) ◽  
pp. 7935-7943 ◽  
Author(s):  
Mohammad Asadullah ◽  
Shu Zhang ◽  
Zhenhua Min ◽  
Piyachat Yimsiri ◽  
Chun-Zhu Li
Keyword(s):  
Gasification Reactivity ◽  
Char Structure ◽  
Biomass Char

An Investigation of the Structure and Gasification Reactivity of Char

2013 ◽  
Vol 295-298 ◽  
pp. 3110-3113
Author(s):  
Pei Wang ◽  
Wen Jian Zhu ◽  
Yong Hui Bai ◽  
Fan Li
Keyword(s):  
Particle Size ◽  
Atmospheric Pressure ◽  
Coal Particle ◽  
Pyrolysis Temperature ◽  
Xrd Analysis ◽  
Structure Change ◽  
Final Temperature ◽  
Gasification Reactivity ◽  
Char Reactivity ◽  
Char Structure

The Yining char samples were prepared in following conditions that raw coal particle size was in range 5-6mm and pyrolysis final temperature was 900oC, 1000oC and 1100oC, respectively, with a heating rate 20oC/min under atmospheric pressure. The gasification reactivity of chars was performed by thermogravimetric analysis (TGA) at 900oC in steam, CO2 and steam/CO2 mixture, respectively. The results show that the gasification reactivity of chars decreases with the increasing of pyrolysis final temperatures and there is synergistic effect between steam and CO2 during co-gasification that influences the char reactivity. The reason may be explained by char structure change, which FTIR showed that –CH3 and –O–CH3 decreased and even disappeared and XRD analysis suggested that the thickness of microcrystalline Lc, the values of microcrystalline diameter La and the aromatic of char fa became larger with increasing pyrolysis temperature.

Numerical Simulation of a Coke Oven

2012 ◽  
Vol 479-481 ◽  
pp. 586-589
Author(s):  
Dan Dan Hao ◽  
Wen Sheng Liu ◽  
Le Ping Dang ◽  
Hong Yuan Wei
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Temperature Distribution ◽  
Heating Rate ◽  
Wall Temperature ◽  
Coke Oven ◽  
Furnace Wall ◽  
Important Approach ◽  
Simulation Results ◽  
Char Structure

At present, the CFD numerical simulation, combined with an experiments involving heat transfer has become an important approach to studying coal carbonization. The aim of this paper is to illustrate how a standard CFD package may be modified so it can be used to simulate temperature distribution, coking time and carbonization processes that occur in coke oven charge. Content of volatile matters and moisture have important influence on heating rate during carbonization. Further, heating rate have effects on char structure an inner coking condition, as well as the carbonization time. In addition, furnace wall temperature have important effects on carbonization, because they can change the coking time. Our simulation results for the coke oven model are in agreement with experimental and virtual data.

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