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Transient Snakes in an Ohmic Plasma Associated with a Minor Disruption in the HT-7 Tokamak
Songtao Mao,Liqing Xu,Liqun Hu,Kaiyun Chen 한국물리학회 2014 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.64 No.9
A transient burst (2 ms, an order of the fast-particle slowdown timescale) of a spontaneous snakeis observed for the first time in a HT-7 heavy impurity ohmic plasma. The features of the low-Zimpurity snake are presented. The flatten electron profile due to the heavy impurity reveals theformation of a large magnetic island. The foot of the impurity accumulation is consistent with thelocation of the transient snake. The strong frequency-chirping behaviors and the spatial structuresof the snake are also presented.
Kinetics of transesterification of methyl acetate and n-octanol catalyzed by cation exchange resins
Yong Liu,Min Wei,Li Gao,Xiying Li,Liqun Mao 한국화학공학회 2013 Korean Journal of Chemical Engineering Vol.30 No.5
The transesterification kinetics of methyl acetate with n-octanol to octyl acetate and methanol were studied using Amberlyst 15 as catalyst in a batch stirred reactor. The influence of the agitation speed, particle size, temperature,catalyst loading, and initial reactants molar ratio was investigated in detail. A pseudo-homogeneous (PH) kinetic model was applied to correlate the experimental data in the temperature range of 313.15 K to 328.15 K. The estimated kinetic parameters made the calculated results in good agreement with the experimental data. A kinetic model describing the transesterification reaction catalyzed by cation exchange resins was developed.