scholarly journals Thermal Decomposition of Dimethyl Ether in the Presence of Nitrogen Oxide

1976 ◽  
Vol 49 (9) ◽  
pp. 2403-2406
Author(s):  
Kohji Tadasa ◽  
Naomi Imai ◽  
Tetsuo Inaba ◽  
Yutaka Kubokawa
Keyword(s):  
Thermal Decomposition ◽  
Nitrogen Oxide ◽  
Dimethyl Ether

scholarly journals Trends of Nitrogen Oxide Release during Thermal Decomposition of Nitrates in Highly Active Liquid Waste

2015 ◽  
Vol 14 (2) ◽  
pp. 86-94 ◽  
Author(s):  
Yuki AMANO ◽  
Koji WATANABE ◽  
Shinsuke TASHIRO ◽  
Yuichi YAMANE ◽  
Jun ISHIKAWA ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Nitrogen Oxide ◽  
Liquid Waste ◽  
Highly Active ◽  
Active Liquid

Influence of Nitric Oxide on the Thermal Decomposition of Dimethyl Ether. Gaseous Catalysis

Nature ◽  
1936 ◽  
Vol 138 (3491) ◽  
pp. 546-547 ◽  
Author(s):  
P. F. GAY ◽  
MORRIS W. TRAVERS
Keyword(s):  
Nitric Oxide ◽  
Thermal Decomposition ◽  
Dimethyl Ether

On the thermal decomposition of dimethyl ether

1937 ◽  
Vol 33 ◽  
pp. 756 ◽  
Author(s):  
P. F. Gay ◽  
Morris W. Travers
Keyword(s):  
Thermal Decomposition ◽  
Dimethyl Ether

scholarly journals Roaming radicals in the thermal decomposition of dimethyl ether: Experiment and theory

2011 ◽  
Vol 158 (4) ◽  
pp. 618-632 ◽  
Author(s):  
R. Sivaramakrishnan ◽  
J.V. Michael ◽  
A.F. Wagner ◽  
R. Dawes ◽  
A.W. Jasper ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Dimethyl Ether

Effect of the addition of ethanol on the combustion and emission characteristics of a common-rail dimethyl ether engine

2016 ◽  
Vol 231 (11) ◽  
pp. 1500-1510 ◽  
Author(s):  
Chunhai Wang ◽  
Pengfei Li ◽  
Xinqi Qiao ◽  
Zhen Huang
Keyword(s):  
Carbon Monoxide ◽  
Nitrogen Oxide ◽  
Dimethyl Ether ◽  
Ignition Delay ◽  
Hydrocarbon Emissions ◽  
Emission Characteristics ◽  
Nitrogen Oxide Emissions ◽  
Start Of Injection ◽  
Combustion Duration ◽  
Crank Angle

The effect of the addition of ethanol on the combustion and emission characteristics of dimethyl ether combustion were investigated in this study using an electronically controlled common-rail dimethyl ether engine. The ignition delay, the crank angle for 50% mass fraction burned, the combustion duration, the nitrogen oxide emissions, the hydrocarbon emissions and the carbon monoxide emissions of the fuel blends with the addition of different percentages of ethanol were analysed for different loads and for different injection timings separately. The results suggest that the effect of ethanol on the dimethyl ether combustion mainly prolongs the ignition delay and inhibits the combustion rate. The ignition delay is prolonged significantly with increasing percentage of ethanol added for low loads or retarded injection timings. A reduction in the combustion rate and an increase in the combustion duration are associated with a higher percentage of ethanol added for high loads or advanced injection timings, leading to lower nitrogen oxide emissions. On the addition of 15% ethanol, the nitrogen oxide emissions are reduced by about 17% for a brake mean effective pressure of 1.2 MPa, and by 32% when the start of injection is at −7° crank angle after top dead centre. Premixed combustion with a sharply prolonged ignition delay and a shortened combustion duration can be achieved by the addition of 15% ethanol when the start of injection is at 5° crank angle after top dead centre. The carbon monoxide emissions show a tendency to increase with increasing amount of ethanol added, whereas the hydrocarbon emissions remain nearly the same until the percentage of ethanol reaches 15%.

KINETICS AND MECHANISMS OF THE PYROLYSIS OF DIMETHYL ETHER: II. THE REACTION INHIBITED BY NITRIC OXIDE AND PROPYLENE

1963 ◽  
Vol 41 (8) ◽  
pp. 1993-2008 ◽  
Author(s):  
D. J. McKenney ◽  
B. W. Wojciechowski ◽  
K. J. Laidler
Keyword(s):  
Nitric Oxide ◽  
Thermal Decomposition ◽  
Dimethyl Ether ◽  
Chain Process ◽  
Maximal Inhibition ◽  
First Order ◽  
Temperature Range ◽  
Maximum Inhibition ◽  
A Chain

The thermal decomposition of dimethyl ether, inhibited by nitric oxide and by propylene, was studied in the temperature range of 500 to 600 °C. About 1.5 mm of nitric oxide gave maximal inhibition, the rate then being approximately 8% of the uninhibited rate. With propylene, approximately 70 mm gave maximal inhibition, the rate being slightly higher than that using nitric oxide (~12.5% of the uninhibited rate). In both cases the degree of inhibition was independent of the ether pressure. In the maximally inhibited regions both reactions are three-halves order with respect to ether pressure. As the pressure of nitric oxide was increased beyond 10–15 mm, the overall rate increased, and in this region the reaction is first order with respect to both nitric oxide and ether. A 50:50 mixture of CH3OCH3 and CD3OCD3, with enough NO to ensure maximum inhibition, was pyrolyzed. Even at very low percentage decomposition the CD3H/CD4 ratio was approximately the same as that in the uninhibited decomposition, proving that the inhibited reaction is largely a chain process. Detailed inhibition mechanisms are proposed in which the inhibitor is involved both in initiation and termination reactions.

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