Insight into the role of piperazine in the thermodynamics and nucleation kinetics of the triethylenediamine–methyl tertiary butyl ether system

CrystEngComm ◽  
2019 ◽  
Vol 21 (6) ◽  
pp. 948-956 ◽  
Author(s):  
Yufeng Quan ◽  
Yang Yang ◽  
Shijie Xu ◽  
Peipei Zhu ◽  
Shiyuan Liu ◽  
...  

Considering the role of piperazine in the TEDA–MTBE system, we investigate how to control the crystal size distribution.

2017 ◽  
pp. 91-95
Author(s):  
E. I. Grushova ◽  
A. .. Al Razuqi ◽  
E. S. Chaiko ◽  
O. A. Miloserdova

IR spectroscopy investigated structural and group composition of base mineral oils isolated from the vacuum distillate by selective purification of N-methylpyrrolidone and the low temperature dewaxing in the presence of a solvent. The role of the latter was carried out by the systems acetone - toluene, acetone - methyl tertiary butyl ether, methyl ethyl ketone - toluene, acetone - toluene - modifying additive. It was shown that the chemical composition of the group of base oils and slack waxes is defined as the nature of the solvent to the dewaxing, and oils sequence of purification steps.


1988 ◽  
Vol 66 (5) ◽  
pp. 802-807 ◽  
Author(s):  
Adnan M. Al-Jarallah ◽  
Mohammed A. B. Siddiqui ◽  
A. K. K. Lee

1988 ◽  
Vol 39 (3) ◽  
pp. 169-174 ◽  
Author(s):  
Adnan M. Al-Jarallah ◽  
A.K.K. Lee ◽  
Mohammed A.B. Siddiqui

2002 ◽  
Vol 125 (1) ◽  
pp. 344-350 ◽  
Author(s):  
S. G. Poulopoulos ◽  
C. J. Philippopoulos

In the present work, the effect of adding ethanol or methyl tertiary butyl ether (MTBE) to gasoline on the regulated and unregulated emissions from an internal combustion engine with a typical three-way catalyst was studied. The addition of ethanol to fuel (10% w/w) increased both the research octane number and the Reid vapor pressure of the fuel, whereas adding 11% w/w MTBE caused an increase only in the research octane number of the fuel. When the fuel contained MTBE, less hydrocarbons, carbon monoxide, and acetaldehyde were emitted in the tailpipe. The increased emissions of acetaldehyde and ethanol were the main disadvantages of using ethanol.


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