Lingjian Kong

Chestnut shell-based activated carbon was prepared with chestnut shell as the raw material and ZnCl2 as the activating agent. Based on thermodynamic parameters, the adsorption behavior of methylene blue (MB) on chestnut shell-based activated carbon was studied, and the effect of temperature on the thermodynamic parameters and adsorption behavior was investigated. The Langmuir equilibrium constant (KL) and the standard equilibrium constant (K0) were used to calculate the thermodynamic parameters, respectively. Comparative analysis showed that spontaneous adsorption (ΔG0 < 0) was more compatible with the standard equilibrium constant (K0). Furthermore, the thermodynamic parameters at 30, 40 and 50 °C were measured, and the adsorption potential was investigated and calculated. Eventually, the mechanism of the adsorption process was determined. It was concluded that the adsorption process mainly involved chemical adsorption, which indicated that MB adsorption was caused by the force of the chemical bond.

Methylene blue

Langmuir adsorption model

Carbon fibers

10.3390/catal12080813

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Heat transfer of single drop impact on a film flow cooling a hot surface

International Journal of Heat and Mass Transfer (2017)

Xuan Gao Lingjian Kong Ri Li Jitian Han

Drop Impact

10.1016/j.ijheatmasstransfer.2016.12.106

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Research on Damage Identification Method of Composite Materials Based on Displacement Modal Shape Parameters

Journal of Physics Conference Series (2019)

Yizheng Zhang Yue Yang Lingjian Kong Wenhao Du

In terms of dynamic detection, in order to improve the identification effect of model parameters on damage, in this paper, a displacement modal shape processing method based on difference accumulation is proposed, and the calculated result of the accumulated difference is used as a damage characterization parameter. With regards to the damage of composite materials, Camanho-Matthews stiffness degradation criterion is introduced to simulate the stiffness degradation characteristics of four damage forms of composite materials: matrix cracking, matrix extrusion, fiber stretching and fiber compression. Taking the composite cantilever beam as the research object, the numerical simulation shows that the difference accumulation method can simultaneously identify the damage of single damage and multiple damage structures under four damage forms, and it can effectively identify the damage forms and damage locations. Moreover, the damage identification sensitivity of the difference accumulation method gradually increases with the position of the damage approaching the fixed end, which has an advantage for the damage identification of the cantilever beam approaching the fixed end.

Matrix (chemical analysis)

10.1088/1742-6596/1168/5/052046

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