Energy-efficient and environment-friendly method to prepare monodispersed silica stationary phases for simultaneous separation of compound drugs

Huo, Zhixia; Wan, Qian-Hong; Chen, Lei

doi:10.1016/j.chroma.2020.460866

Cited by 8 publications

(1 citation statement)

References 19 publications

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“…One of the most important properties of foundry sand is stability at high temperatures [29][30][31]. e chemical composition of the foundry sand is mainly SiO 2 , indicating that the foundry sand is stable at high temperatures.…”

Section: Chemical Composition Analysismentioning

confidence: 99%

Thermal Decomposition Behaviour of Foundry Sand for Cast Steel in Nitrogen and Air Atmospheres

Chen

Zhang

et al. 2020

Mathematical Problems in Engineering

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Sand casting is the most widely used casting technique, known for ages, even since ancient times. The main goal of this study was to determine the thermal decomposition behaviour of foundry sand for cast steel. We first tested the basic properties of foundry sand, including its proximate analysis, chemical composition, and particle size characteristics; we next monitored the thermal decomposition behaviour of foundry sand for cast steel via simultaneous thermal analysis. We focused on the mass loss of foundry sand for cast steel at different heating rates in nitrogen and air atmospheres. We adopted a novel method to calculate the volatile release characteristic index of foundry sand. The volatile content of foundry sand for cast steel was very low, so the volatile release characteristic index of the sand could not be strictly calculated according to this concept. We calculated the thermal decomposition kinetics parameters of foundry sand, namely, the activation energy and preexponential factor, under kinetics theory. To thoroughly test the fitting effect, we conducted a single-factor analysis of variance on the source of error. The results showed that the independent variable has a significant influence on the dependent variable and that the fitting equation we selected is feasible and effective.

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Section: Chemical Composition Analysismentioning

confidence: 99%