Drying kinetics of RDX under atmospheric pressure and vacuum conditions

Zhang Yaoxuan; Chen Houhe; Chen Teng

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Drying kinetics of RDX under atmospheric pressure and vacuum conditions

机译：RDX在大气压和真空条件下的干燥动力学

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The drying characteristics of hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) are investigated in the ranges of 60-90 ℃ of drying temperature under atmospheric pressure and vacuum conditions in a laboratory scale dryer. The effect of drying temperature and absolute pressure on the drying characteristics is determined. In order to estimate and select the suitable form of RDX drying curves, the curves are fitted to ten different semi-theoretical and/or empirical thin-layer drying models and coefficients are evaluated by non-linear regression analysis. The models are compared based on their coefficient of determination, such as mean bias error, root mean square error, reduced chi-square and modeling efficiency between experimental and predicted moisture ratios. It is deduced that Midilli-Kucuk model has shown a better fit to the experimental drying data as compared to other models. A diffusion model is used to describe the moisture transfer and the effective diffusivity for RDX drying is also determined at each temperature. Beside, the activation energy is also expressed using Arrhenius-type relationship under atmospheric pressure and vacuum conditions.

机译：在实验室规模的干燥机中，在大气压和真空条件下，在60-90℃的干燥温度范围内，研究了六氢-1,3,5-三硝基-1,3,5-三嗪（RDX）的干燥特性。确定干燥温度和绝对压力对干燥特性的影响。为了估计和选择合适形式的RDX干燥曲线，将这些曲线拟合到十种不同的半理论和/或经验薄层干燥模型，并通过非线性回归分析评估系数。根据确定系数对模型进行比较，例如平均偏差误差，均方根误差，减少的卡方以及实验和预测水分比之间的建模效率。可以推断，与其他模型相比，Midilli-Kucuk模型对实验干燥数据显示出更好的拟合度。扩散模型用于描述水分传递，并且还确定了在每个温度下RDX干燥的有效扩散率。此外，活化能还用大气压和真空条件下的阿伦尼乌斯型关系表示。

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来源
《Energy Conversion & Management》 |2014年第4期|266-275|共10页
作者
Zhang Yaoxuan; Chen Houhe; Chen Teng;
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作者单位

Chemical Engineering Institute, Nanjing University of Science & Technology, Nanjing 210094, China;

Chemical Engineering Institute, Nanjing University of Science & Technology, Nanjing 210094, China;

Chemical Engineering Institute, Nanjing University of Science & Technology, Nanjing 210094, China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
RDX; Atmospheric pressure; Vacuum; Drying models; Temperature;

机译：RDX;气压;真空;干燥模型;温度;

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机译：I.通过在高真空和常压下吸附气态酸和碱，对清洁和氧化的钼（100）表面进行化学表征。二。铝（111）表面的高温氧化。

6. Low pressure superheated steam drying of onion slices: kinetics and quality comparison with vacuum and hot air drying in an advanced drying unit [O] . Rachna Sehrawat, Prabhat K. Nema 2018

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7. CO oxidation trends on Pt-group metals from ultrahigh vacuum to near atmospheric pressures: A combined in situ PM-IRAS and reaction kinetics study [O] . Gao F, McClure SM, Cai Y, 2009

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8. Atmospheric pressure flow reactor: Gas phase chemical kinetics under tropospheric conditions without wall effects [R] . 1991

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3. Process for the drying of large pieces of wood is of the pressures under - atmospheric or under vacuum, in particular for the drying of wood delicate and fragile. [P] . 外国专利： FR2311637B1 . 1982-08-20

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4. Process for the drying of large pieces of wood is of the pressures under - atmospheric or under vacuum, in particular for the drying of wood delicate and fragile. [P] . 外国专利： FR2311637A1 . 1976-12-17

机译：干燥大块木材的方法是在大气压或真空下进行的，尤其是干燥易碎且易碎的木材。

5. Atmospheric pressure flow reactor: gas phase chemical kinetics under tropospheric conditions without wall effects [P] . 外国专利： US5179025A . 1993-01-12

机译：大气压流动反应器：对流层条件下无壁效应的气相化学动力学

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Drying kinetics of RDX under atmospheric pressure and vacuum conditions

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