Heterogeneous reaction of N2O and formation of NO with coal char in the simulated air-staged combustion atmosphere of pulverized coal at high temperature

Fuel ◽  
2021 ◽  
Vol 289 ◽  
pp. 119856
Author(s):  
Songlin Liu ◽  
Weidong Fan ◽  
Xiaofeng Wu ◽  
Jun Chen ◽  
Zhuang Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
Heterogeneous Reaction ◽  
Coal Char ◽  
Pulverized Coal ◽  
Staged Combustion ◽  
Combustion Atmosphere

Experimental Study on Carbonization of Low-Rank Pulverized Coal with High Temperature Heat Pipe

2014 ◽  
Vol 953-954 ◽  
pp. 1035-1039
Author(s):  
Li Qun Wang ◽  
Zhong Bo Yi ◽  
Zhong Xiang Wei
Keyword(s):  
High Temperature ◽  
Heat Pipe ◽  
Pulverized Coal ◽  
Holding Time ◽  
Raw Material ◽  
Low Rank ◽  
Experimental Result ◽  
Operating Characteristics ◽  
Temperature Heat ◽  
High Temperature Heat Pipe

Aimed at improving the utilization of pulverized coal, high-temperature heat pipe technology was introduced into lignite carbonization.Under the design of power of 10kw semi-industrial pulverized coal carbonization test equipment, Fugu lignite coal as raw material to investigate the operating characteristics of the device and carbonization characteristics. Experimental result shows that the high temperature heat pipes heat steadily and meet the temperature requirement of low-temperature carbonization. With the extension of the holding time, the semi-coke fixed carbon content increasing, but volatile matter vice versa, however, holding time above 60 minutes, the effect of carbonization is not obvious, and the best carbonization time is 30 ~ 60 minutes. The length of the holding time has little effect on gas composition, the content of H2 and CH4 are relatively higher than the rest gas, (H2 + CH4) gas accounted for 70% of the total, the heating value remains at 18.76 ~ 19.22MJ/m3, belongs to medium-high value gas, could provide for industrial and civilian use.

Effect of CO2 and steam gasification reactions on the oxy-combustion of pulverized coal char

2012 ◽  
Vol 159 (11) ◽  
pp. 3437-3447 ◽  
Author(s):  
Ethan S. Hecht ◽  
Christopher R. Shaddix ◽  
Manfred Geier ◽  
Alejandro Molina ◽  
Brian S. Haynes
Keyword(s):  
Coal Char ◽  
Steam Gasification ◽  
Pulverized Coal

Numerical Simulation of High-Temperature Air Direct-Ignition of Pulverized Coal

2005 ◽  
Author(s):  
Z. Z. Kang ◽  
B. M. Sun ◽  
Y. H. Guo ◽  
W. Zhang ◽  
H. Q. Wei
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
High Temperature ◽  
Simulation Method ◽  
Pulverized Coal ◽  
Inlet Velocity ◽  
Operation Optimization ◽  
Structure Improvement ◽  
Simulation Results ◽  
Direct Ignition

Numerical simulation method is employed in this article to investigate various high-temperature air direct-ignition processes of pulverized coal (PC). Several important factors are analyzed, which are the inlet velocity of primary air flow, PC concentration and the velocity and temperature of high temperature air. The flow, combustion and heat transfer in high temperature air oil-free ignition burner can also be obtained from the simulation results, which are in accordance with the experimental data. The research provides guidance for structure improvement and operation optimization of burner.

THE OXIDATION, IGNITION, AND DETONATION OF FUEL VAPORS AND GASES: VII. THE OXIDATION OF PENTANE IN VARYING CONCENTRATION IN AIR AT TEMPERATURES RISING TO 700 °C. AND THE EFFECT OF IRON CARBONYL ON REACTION VELOCITY

1948 ◽  
Vol 26f (10) ◽  
pp. 426-440 ◽  
Author(s):  
R. O. King
Keyword(s):  
High Temperature ◽  
Heterogeneous Reaction ◽  
Reaction Chamber ◽  
Iron Carbonyl ◽  
Experimental Results ◽  
Reaction Velocity ◽  
High Temperature Range ◽  
Rational Explanation ◽  
Increasing Temperature ◽  
Antiknock Property

Results are given for the oxidation in reaction chamber No. 10 of pentane mixed with air, mixture strength being varied from 25% weak to 100% rich. Oxidations were carried out with and without additions of iron carbonyl to the pentane. The experiments were made mainly to find a rational explanation for the antiknock property of rich fuel–air mixtures. The experimental results for undoped mixtures show that, at temperatures approaching those of the end gas in an engine reaction velocity increases by 100% on increasing mixture strength over the range mentioned above and by 100% on increasing temperature from 600° to 650 °C. Similar increases in reaction velocity with rise of temperature and with increase of mixture strength were obtained for the doped mixtures over the high temperature range but at temperatures 150 °C. lower than for undoped mixtures. The characteristics of the experimental results confirm the conclusion reached in earlier Parts, namely, that oxidation of pentane m the conditions of the experiments is a heterogeneous reaction.

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