陈启元
长期从事冶金物理化学领域的研究,包括与冶金和材料有关的各体系的热力学性质测定、化学结晶、冶金过程强化基础理论、冶金化学平衡、冶金热分析与非等温反应分析和资源回收利用的基础理论研究等。
个性化签名
- 姓名:陈启元
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学术头衔:
博士生导师
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学科领域:
物理化学
- 研究兴趣:长期从事冶金物理化学领域的研究,包括与冶金和材料有关的各体系的热力学性质测定、化学结晶、冶金过程强化基础理论、冶金化学平衡、冶金热分析与非等温反应分析和资源回收利用的基础理论研究等。
陈启元,1948年6月生,安徽望江人。教授,博士生导师,中南大学副校长,国家教育部优秀年轻教师重点跟踪管理对象,国家级有突出贡献的中青年科技专家,政府特殊津贴获得者,中国有色金属学会冶金物理化学学术委员会主任委员,湖南省有色金属学会副理事长,湖南省化学化工学会副理事长,中国化学会化学热力学与热分析专业委员会副主任委员,国务院学位委员会学科评议组成员,湖南省政协委员。
1986年获中南工业大学工学博士学位;1989-1990年作为加拿大阿尔伯达大学的客座教授和博士后研究员,在国际著名化学热力学专家Hepler教授的实验室工作。长期从事冶金物理化学领域的研究,包括与冶金和材料有关的各体系的热力学性质测定、化学结晶、冶金过程强化基础理论、冶金化学平衡、冶金热分析与非等温反应分析和资源回收利用的基础理论研究等,研究成果受到国内外同行的普遍重视。已在国内外著名或知名刊物上发表研究论文100余篇,大部分被SCI、EI、ISTP等著名文摘刊物摘录。获省部级科研及教学成果5项,目前承担国家重点基础研究发展规划(973)项目1项、863项目1项、国家自然科学基金重点项目1项、国家自然科学基金项目2项、国家教委博士点基金项目1项以及其它各类科研项目多项,培养博士和硕士生36名。
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7
【期刊论文】Calorimetric studies on leaching of mechanically activated sphalerite in FeCl3 solution
陈启元, Zhongliang Xiao a, b, ∗, Qiyuan Chen a, Zhoulan Yin a, Huiping Hu a, Pingmin Zhang a
Thermochimica Acta 416(2004)5-9,-0001,():
-1年11月30日
The thermal behaviors of the leaching of mechanically activated sphalerite were investigated for the first time by calorimetry. The specific granulometric surface area and the structural disorder sphalerite were also analyzed by X-ray diffraction laser particle size analyzer and X-ray powder diffraction (XRD) analysis, respectively. A new method to measure the mechanically activated storage energy of minerals was proposed by designing a thermochemical cycle that made mechanically activated and non-activated mineral reaching the same final state while leaching in FeCl3 solution. The results indicate that the mechanically activated storage energy of sphalerite rises with the increased grinding time and is closely related to the lattice distortions and crystallite sizes. The calorimetric results of the products from sieved in water or ethanol medium and the products from 2h treatment of mechanically activated sphalerite under pure argon (99.99vol.%) at different temperatures indicate that the mechanically activated storage energy of sphalerite is caused mainly by changes of the crystal structure, and the reactivity of mechanically activated sphalerite is difficult to lose.
Calorimetric method, Mechanical activation, Sphalerite, Leaching, Structural disorder
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陈启元, JUN ZHOU, , * QI Y. CHEN, JIE LI, ZHOU L. YIN, XIA ZHOU, and PING M. ZHANG
Geochimica et Cosmochimica Acta, Vol. 67, No.18, pp. 3459-3472, 2003,-0001,():
-1年11月30日
By using a specially designed and constructed isopiestic apparatus, we measured the osmotic coefficients at 313.2K for the NaOH-NaAl(OH)4-H2O system with the total alkali molality, mNaOHT (mNaOH+mNaAl[OH]4), from 0.05mol/kg H2O to 12mol/kg H2O and αK (mNaOHT/mNaAl(OH)4) from 1.64 to 5.53. The mean standard deviation of the measurements is 0.0038. Several sets of the Pitzer model parameters for NaOH-NaAl(OH)4-H2O system were then obtained by regressing the measured osmotic coefficients with the Pitzer model and the Pitzer model parameters for NaOH(aq). One set of the results is as follows: β(0) NaOH: 0.08669, β(1)NaOH: 0.31446, β(2) NaOH: β0.00007367, C(1)NaOH: 0.003180, β(0) NaAl(OH)4: 0.03507, β(1) NaAl(OH)4: 0.02401, C(1) NaAl(OH)4: β0.001066, θOH-Al(OH)4-: 0.08177, ψNa+OH-Al(OH)4-: -0.01162. The mean standard difference between the calculated and the measured osmotic coefficients is 0.0088. With the obtained Pitzer model parameters, we calculated the values of K1=(γNaAl(OH)4, cal2-mAl(OH)4-, exp)/(γNaOH, cal2-mOH-, exp) for the gibbsite solubility. The results show that the obtained Pitzer model parameters are reliable, and the relative error of the calculated activity coefficients should be <2.1%. We also compared the calculated gibbsite solubility data among several activity coefficients models over a range of mNaOHT at various temperatures. The comparison indicates that our activity coefficients model may be approximately applied in the ranges of temperature from 298.2 to 323.2 K and mNaOHT from 0 to 8 mol/kg H2O. We also calculated the stoichiometric activity coefficients of NaOH and NaAl(OH)4 and the activity of H2O for the NaOH-NaAl(OH)4-H2O system, and these calculations establish their variations with mNaOHT and αK. These variations imply that the strengths of the repulsive interactions among various anions are in the following sequence: Al(OH)4-Al(OH)4-<Al(OH)4-OH-<OH-OH-, and the attractive interaction between Al(OH)4 and H2O is weaker than that between OH and H2O. Copyright.
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【期刊论文】过饱和铝酸钠溶液中氢氧化铝自发成核动力学规律的研究
陈启元, 李洁, 尹周澜
高等学校化学学报,2003,24(9):1652~1657,-0001,():
-1年11月30日
用电导法和吸光光度法首次对苛性比相同的不同浓度过饱和铝酸钠溶液自发分解过程进行了实时跟踪研究,获得铝酸钠溶解氢氧化铝自发成核动力学方程,探索了H2O和Na+对氢氧化铝自发成核过程的影响。结果表明,过饱和铝酸钠溶液分解为氢氧化铝属化学反应控制过程;H2O参与了溶液分解过程控制步骤的反应;K+和Na+等阳离子参与了溶液的重构,但对溶液分解的控制步骤影响不大。
铝酸钠溶液, 氢氧化铝, 自发成核, 结晶动力学
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【期刊论文】Standard enthalpy of formation of sodium paratungstate Na10H2W12O42 27H2O(s)
陈启元, Qiyuan Chen, Shijun Liu*, Pingmin Zhang
Thermochimica Acta 352-353(2000)99-102,-0001,():
-1年11月30日
The standard enthalpy of decomposition of Na10H2W12O42-27H2O(s) at 298.15K was measured using the method of threestep calorimetry in a Calvet twin-vessel microcalorimeter. The standard enthalpy of formation of Na10H2W12O42-27H2O(s) at 298.15K was
Sodium paratungstate, Enthalpy of formation, Calorimetry, Thermal decomposition
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【期刊论文】Determination of the standard enthalpy of formation of paratungstate A ion
陈启元, Shijun Liu a, Qiyuan Chen and Pingmin Zhang
J. Chem. Thermodynamics 2001, 33, 71-76,-0001,():
-1年11月30日
Enthalpy changes for the reaction of HCl(aq) with Na2WO4(aq) were measured at T=298.15K in a HT-1000 calorimeter. The standard enthalpy of reaction for the formation of W7O6-24(aq) was calculated on the basis of the experimental results, △Hom(298.15K)=-320.7-1.0)kJ•mol-1. Combining this with the values from the literature led to the standard enthalpy of formation of W7O6-24 (aq), △fHom(298.15K)=-6689.8kJ•mol-1.
standard enthalpy of formation, paratungstate A ion, calorimetry
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【期刊论文】Thermodynamic properties of Na2W2O7(s) and Na2W4O13(s) in the temperature range 298.15
陈启元, Shijun Liu a, *, Qiyuan Chen b, Pingmin Zhang b
Thermochimica Acta 371(2001)7-11,-0001,():
-1年11月30日
The enthalpy increments △T 273∶15KH0m of Na2W2O7(s) and Na2W4O13(s) were measured in the temperature range 273-979 K by the drop method using a high temperature Calvet HT-1000 calorimeter. The results can be represented by the polynomial equations: △T 273.15KH0m(Na2W2O7)=-71, 006+211.12T+10.720×10-2T2+2.566×106T-1 △T273.15KH0m(Na2W4O13)-136, 568+388.97T+6.643×10-2T2+6.950×106T-1 The expressions of the heat capacity against temperature for these two compounds were obtained from the differentiation of the above equations. By combining these results with data from the literature, smoothed thermodynamic functions have been calculated for Na2W2O7.
Sodium ditungstate, Sodium tetratungstate, Enthalpy increment, Heat capacity
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【期刊论文】Standard enthalpy of formation of paratungstate B ion H2W12O4210-(aq)
陈启元, Shijun Liu*, Qiyuan Chen, Pingmin Zhang
Thermochimica Acta 352-353(2000)103-105,-0001,():
-1年11月30日
The enthalpy of sodium paratungstate Na10H2W12O42 27H2O(s) dissolved in solution of 1.0mol dm-3 LiClO4 was measured at 298.15 K using a Calvet twin-vessel microcalorimeter. The standard enthalpy of formation of paratungstate B ion, H2W12O42 10-(aq), was calculated on the basis of the experimental results. Combining this with values from the literature led to DfH0m (H2W12O42 10-aq, 298.15 K)=-(11653.5
Standard enthalpy of formation, Paratungstate Bion, Calorimetry
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