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稀土镝掺杂炭黑填充型粉末NR的硫化动力学模型
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作者 林雅铃 张安强 王炼石 《橡胶工业》 CAS 北大核心 2008年第11期645-651,共7页
采用液相化学沉积法和凝聚共沉法制备稀土镝掺杂炭黑填充型粉末NR[P(NR/HAF-Dy)],在分析P(NR/HAF-Dy)硫化曲线的基础上,建立了不同稀土镝用量下胶料在硫化延迟阶段、硫化及硫化返原阶段的动力学模型。采用该动力学模型计算得到的拟合值... 采用液相化学沉积法和凝聚共沉法制备稀土镝掺杂炭黑填充型粉末NR[P(NR/HAF-Dy)],在分析P(NR/HAF-Dy)硫化曲线的基础上,建立了不同稀土镝用量下胶料在硫化延迟阶段、硫化及硫化返原阶段的动力学模型。采用该动力学模型计算得到的拟合值与实测值吻合较好,说明该模型可以用来很好地模拟P(NR/HAF-Dy)在各个硫化温度下的硫化反应过程。 展开更多
关键词 稀土镝掺杂炭黑 炭黑填充型粉末NR 硫化动力学模型
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An Adsorption Kinetic Model for Sulfur Dioxide Adsorption by ZL50 Activated Carbon 被引量:8
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作者 高继贤 王铁峰 +4 位作者 舒庆 山尼 温倩 王德峥 王金福 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2010年第2期223-230,共8页
A semi-empirical adsorption kinetic model was proposed with the time compensation method to describe the chemisorption of SO2 in flue gas by carbon adsorbents for flue gas purification.The change in adsorption capacit... A semi-empirical adsorption kinetic model was proposed with the time compensation method to describe the chemisorption of SO2 in flue gas by carbon adsorbents for flue gas purification.The change in adsorption capacity and adsorption rate with time at different water vapor concentrations and different SO2 concentrations was studied.The model was in good agreement with experimental data.The surface reaction was probably the rate controlling step in the early stage for SO2 adsorption by ZL50 activated carbon.The parameters m and n in the nth order adsorption kinetic model were related to the magnitude of the time compensation and adsorption driving force,respectively.The change of parameter n with water vapor concentrations and sulfur dioxide concentrations was studied and some physical implications were given.The sum of square errors was less than 1.0 and the average absolute percentage deviations ranged from 0.5 to 3.2.The kinetic model was compared with other models in the literature. 展开更多
关键词 adsorption kinetic model time compensation method flue gas purification ZL50 activated carbon adsorption capacity adsorption rate
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Kinetics of Glucose Ethanolysis Catalyzed by Extremely Low Sulfuric Acid in Ethanol Medium 被引量:2
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作者 朱伟娜 常春 +1 位作者 马晨 杜风光 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2014年第2期238-242,共5页
The kinetics for production of ethyl levulinate from glucose in ethanol medium was investigated. The experiments were performed in various temperatures (433-473 K) and initial glucose concentrations (0.056-0.168 mo... The kinetics for production of ethyl levulinate from glucose in ethanol medium was investigated. The experiments were performed in various temperatures (433-473 K) and initial glucose concentrations (0.056-0.168 mol·L-1) with extremely low sulfuric acid as the catalyst. The results show that higher temperature can improve the conversion of glucose to ethyl levulinate, with higher yield of ethyl levulinate (44.79%, by mole) obtained at 473 K for 210 min. The kinetics follows a simplified first-order kinetic model. For the main and side reactions, the values of activation energy are 122.64 and 70.97 kJ·mo1-1, and the reaction orders are 0.985 and 0.998, respectively. 展开更多
关键词 ethyl levulinate GLUCOSE KINETICS biomass
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Leaching kinetics of antimony-bearing complex sulfides ore in hydrochloric acid solution with ozone 被引量:1
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作者 Xue-yi GUO Yun-tao XIN +1 位作者 Hao WANG Qing-hua TIAN 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2017年第9期2073-2081,共9页
The leaching kinetics of Sb and Fe from antimony-bearing complex sulfides ore was investigated in HCl solution by oxidation?leaching with ozone.The effects of temperature,HCl concentration,stirring speed and particle ... The leaching kinetics of Sb and Fe from antimony-bearing complex sulfides ore was investigated in HCl solution by oxidation?leaching with ozone.The effects of temperature,HCl concentration,stirring speed and particle size on the process were explored.It is found that the recoveries of Sb and Fe reach86.1%and28.8%,respectively,when the reaction conditions are4.0mol/L HCl,900r/min stirring speed at85°C with<0.074mm particle size after50min leaching.XRD analysis indicates that no new solid product forms in the leaching residue and the leaching process can be described by shrinking core model.The leaching of Sb corresponds to diffusion-controlled model at low temperature(15?45°C)and mixed-controlled model at high temperature(45?85°C),and the apparent activation energies are6.91and17.93kJ/mol,respectively.The leaching of Fe corresponds to diffusion-controlled model,and the apparent activation energy is1.99kJ/mol.Three semi-empirical rate equations are obtained to describe the leaching process. 展开更多
关键词 OZONE antimony-bearing complex sulfides ore oxidation-leaching kinetic mixed-controlled model diffusioncontrolled model
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Investigation of Calcium Sulfide Regeneration with Steam
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作者 HUANG Jie-jie ZHAO Jian-tao +2 位作者 CHEN Fu-yan ZHANG Yong-qi WANG Yang 《Journal of China University of Mining and Technology》 EI 2005年第4期288-292,共5页
Harmless treatment of CaS from coal gas desusulfurization and other industries is of very importance for the environmental protection. In this paper, the experimental investigation of calcium sulfide regeneration with... Harmless treatment of CaS from coal gas desusulfurization and other industries is of very importance for the environmental protection. In this paper, the experimental investigation of calcium sulfide regeneration with steam at atmospheric pressure was carded out using TGA, fixed bed reactor and SEM-EDX analysis. The results show that the reaction mechanism of CaS with steam varies with temperature. The reaction occurs obviously at the temperature above 630℃ and the dominant products include CaSO4 (or CaSO3) and H2S, as the temperature is over 850℃, the primary products become CaO, SO2 and H2S. The CaS regeneration reaction will strongly depend on the temperature and the data over 900℃ can be fitted by the Shrinking-Core Model (SCM). 展开更多
关键词 CAS STEAM REGENERATION kinetics model
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Sulfation Kinetics in the Preparation of Cellulose Sulfate
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作者 姚善泾 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 1999年第1期47-55,共9页
In the established apparatus, the conversion ratios of cellulose sulfation (X) under different sulfation conditions were measured. The range of temperature was from -5℃ to +5℃, and the H2SO4 concentration was from 3... In the established apparatus, the conversion ratios of cellulose sulfation (X) under different sulfation conditions were measured. The range of temperature was from -5℃ to +5℃, and the H2SO4 concentration was from 3.1 mol·L-1 to 4.5mol·L-1. The experimental results were used for the establishment of the kinetic model for cellulose sulfation. With the model, X values and the yield of NaCS (Y) can be calculated, thus the reaction with respect to H2SO4 concentration is determined to be third order. 展开更多
关键词 kinetic model cellulose sulfate MICROCAPSULE
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