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Chinese Chemical Letters 2011年第12期22卷 1465-1468页

作者： Rui Qi Wang Na Ni Wang Jia Jie Zhang Yan Zhu College of Environmental and Biological Engineering Chongqing Technology and Business UniversityChongqing 400067China Department of Chemistry Xixi CampusZhejiang UniversityHangzhou 310028China

The separation optimization of nine organic and inorganic anions in tobacco leaves using gradient ion chromatography by response surface methodology was *** order to achieve this goal the usefulness of the chromatographic response function（CRF） for the evaluation of the two different chromatographic performance goals（resolution and analysis time） was tested. The experiments were performed according to a Box-Behnken design response surface experimental design.

关键词： response surface methodology Ion chromatography Gradient elution Tobacco leaves

response surface methodology for optimizing adsorption performance of gel-type weak acid resin for Eu(Ⅲ)

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Transactions of Nonferrous Metals Society of China 2015年第12期25卷 4207-4215页

作者：陈婷李斌方磊陈德睢许文斌熊春华浙江工商大学化学应用系杭州310018 Department of Food Science and Human Nutrition University of Florida

The conditions relating to enhanced adsorption procedure of earth element europium（Eu） onto gel-type weak acid resin（110-H） in aqueous solution were optimized by means of the response surface methodology（RSM）, which proved that 110-H owned satisfactory adsorption capacity（346.85 mg/g） in optimum conditions, belonging to one of the high adsorption capacity materials. Then, the adsorption and desorption behaviors were investigated by batch studies. The adsorption performance showed high agreement with the Lagergren-first-order model and Langmuir isotherm with thermodynamic adsorption parameters of ΔH= 36.1 k J/mol and ΔS=200 J/（mol·K）. Desorption study revealed that 110-H could be effectively eluted by a low concentration of HCl solution（0.1 mol/L） to regenerate and reuse. Finally, the 110-H and Eu（III） loaded 110-H were characterized by IR spectroscopy and scanning electron microscope（SEM） to analyze the mechanism of adsorption, which proved to be chemisorbed.

关键词： Eu(III) response surface methodology adsorption gel-type weak acid resin

Simulation and analysis of soil homogenization drills based on discrete element method and response surface methodology

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Particuology 2024年第5期88卷 128-148页

作者： Zhipeng Wang Tong Zhu Youzhao Wang Song Yang Feng Ma Xu Li Institute of Process Equipment and Environmental Engineering School of Mechanical Engineering and AutomationNortheastern UniversityShenyang110819China Liaoning Coning Testing Co. Ltd.Shenyang110170 China

Currently,rotary drilling is one of the main pieces of equipment used for in-situ remediation of contaminated ***,this equipment has problems such as uneven mixing and low utilization efficiency,which affect the efficiency of in-situ soil *** improve the efficiency of in-situ soil remediation,this paper takes contaminated black soil as the research object,and the structural design of the new three-stage soil remediation auger is carried out based on *** mixing process of soil and heavy metal passivator under different motion and structural parameters was investigated by the discrete element method(DEM)and response surface *** experimental design was based on rotational speed,homogenizing mixing time,crushing section pitch,and homogenizing section pitch as factors,and soil fragmentation ratio,the coefficient of dispersion,and torque as optimization *** kinematic and structural parameters of the three-stage auger drill bit were then optimized using the one-factor method,the orthogonal test,and the response surface methodology,*** test method uses a one-way test to determine the central level value of the orthogonal test and a comprehensive balance method to determine the best combination of parameters for the orthogonal test,which is then used as the central value of the response surface test for parameter *** optimal combinations of kinematic and structural parameters of the three-stage auger drill bit are determined and validated using response surface *** optimum combination of parameters was found to be a speed of 129 rpm,a homogenizing mixing time of 24 s,a pitch of 165 mm in the crushing section,and a pitch of 132 mm in the homogenizing *** error between the optimal value of the predicted model using the response surface method and the actual simulated value under the optimal parameters is 4.2%,4.9%,and 5.3%,*** optimized factor parameters provide a refe

关键词： Black soil Mixing homogeneity Orthogonal method response surface methodology Discrete element method Soil remediation

Application of response surface methodology for Analysis of Reheat Steam Temperatures in a Double Reheat Coal-Fired Boiler

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Journal of Thermal Science 2022年第6期31卷 2203-2215页

作者： ZHANG Jian XU Wei ZHANG Zhongxiao FAN Haojie WU Xiaojiang DONG Jiancong Institute of Thermal Energy Engineering School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Energy Research Institute Nanjing Institute of TechnologyNanjing211167China

For the improvement of reheat steam quality and performance of double reheat coal-fired utility boiler under wide load operation, a variety of temperature regulation ways were utilized to adjust the energy distribution between different heating surfaces. In this paper, thermodynamic calculation based on the fundamental heat transfer theory was conducted for the analysis of temperature regulation strategy effects to steam temperature. In consideration of the specific overlapping heating surface arrangement, the compartment model was adopted to solve this problem. response surface methodology(RSM) was used to analysis the effect of each temperature regulating variables on the steam temperature and boiler efficiency;then the polynomial model was fitted to predict the primary and secondary steam temperature simultaneously. Results showed that the flue gas recirculation rate has a relatively significant influence on the steam temperature, the maximum temperature deviation between fitting value and calculation value is 3.85℃ in 75% THA;the quadratic model can well predict the steam temperature under different operation conditions in wide load change. The variation of flue gas baffle has a significant influence on the boiler efficiency, compared to the flue gas recirculation and angle of burner oscillation. The influence of various factors on the reheat steam temperature is flue gas baffle > flue gas recirculation > angle of burner oscillation.

关键词： reheat steam temperature flue gas baffle flue gas recirculation response surface methodology coal-fired boiler

Using bipolar membrane electrodialysis to synthesize di-quaternary ammonium hydroxide and optimization design by response surface methodology

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Chinese Journal of Chemical Engineering 2017年第9期25卷 1176-1181页

作者： Jiangnan Shen Zhendong Hou Congjie Gao Center for Membrane Separation and Water Science & Technology Zhejiang University of Technology

Bipolar membrane electrodialysis(BMED) has already been described for the preparation of quaternary ammonium hydroxide. However, compared to quaternary ammonium hydroxide, di-quaternary ammonium hydroxide has raised great interest due to its high thermal stability and good oriented *** order to synthesize N,N-hexamethylenebis(trimethyl ammonium hydroxide)(HM(OH)_2) by EDBM,experiments designed by response surface methodology were carried out on the basis of single-factor experiments. The factors include current density, feed concentration and flow ratio of each compartment(feed compartment: base compartment: acid compartment: buffer compartment). The relationship between current efficiency and the above-mentioned three factors was quantitatively described by a multivariate regression model. According to the results, the feed concentration was the most significant factor and the optimum conditions were as follows: the current efficiency was up to 76.2%(the hydroxide conversion was over 98.6%), with a current density of 13.15 m A·cm^(-2), a feed concentration of 0.27 mol·L^(-1) and a flow ratio of 20 L·h^(-1):26 L·h^(-1):20 L·h^(-1):20 L·h^(-1) for feed compartment, base compartment, acid compartment, and intermediate compartment, respectively. This study demonstrates the optimized parameters of manufacturing HM(OH)_2 by direct splitting its halide for industrial application.

关键词： Di-quaternary ammonium hydroxide Bipolar membrane electrodialysis response surface methodology N,N-hexamethylenebis(trimethyl ammonium hydroxide)

A comprehensive study of hydrogen production from ammonia borane via PdCoAg/AC nanoparticles and anodic current in alkaline medium:experimental design with response surface methodology

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Frontiers in Energy 2020年第3期14卷 578-589页

作者： Hilal CELIK KAZICI Sakir YILMAZ Tekin SAHAN Fikret YILDIZ Omer Faruk ER Hilal KIVRAK Department of Chemical Engineering Faculty of EngineeringVan Yiizuncii Yil University65080 VanTurkey

In this paper,the optimization of hydrogen(H2)production by ammonia borane(NH3BH3)over PdCoAg/AC was investigated using the response surface ***,the electro-oxidation of NH3BH3 was determined and optimized using the same method to measure its potential use in the direct ammonium boran fuel ***,the ternary alloyed catalyst was synthesized using the chemical reduction *** synergistic effect between Pd,Co and Ag plays an important role in enhancement of NH3BH3 *** addition,the support effect could also efficiently improve the catalytic ***,the effects of NH3BH3 concentration(0.1-50 mmol/5 mL),catalyst amount(1-30 mg)and temperature(20℃-50℃)on the rate of H2 production and the effects of temperature(20℃-50℃),NH3BH3 concentration(0.05-1 mol/L)and catalyst amount(0.5-5 jiL)on the electro-oxidation reaction of NH3BH3 were investigated using the central composite design experimental *** implementation of the response surface methodology resulted in the formulation of four models out of which the quadratic model was adjudged to efficiently appropriate the experimental data.A further statistical analysis of the quadratic model demonstrated the significance of the model with a pvalue far less than 0.05 for each model and coefficient of determination(R2)of 0.85 and 0.95 for H2 production rate and NH3BH3 electrroxidation peak current,respectively.

关键词： ammonia borane hydrogen production fuel cell response surface methodology

Application of response surface methodology(RSM) for optimization of leaching parameters for ash reduction from low-grade coal

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International Journal of Mining Science and Technology 2018年第4期28卷 617-625页

作者： Sushanta Kumar Behera Himanshu Meena Sudipto Chakraborty B.C.Meikap Department of Chemical Engineering Indian Institute of Technology (IIT) Kharagpur Department of Chemical Engineering School of Engineering Howard College University of Kwazulu-Natal (UKZN)

Coal is the world＇s most abundant energy source because of its abundance and relatively low cost. Due to the scarcity in the supply of high-grade coal, it is necessary to use low-.grade coal for fulfilling energy demands of modern civilization. However, due to ItS high ash and moisture content, low-grade coal exerts the substantial impact on their consumption like pyrolysis, liquefaction, gasification and combus- tion process. The present research aimed to develop the efficient technique for the production of clean coal by optimizing the operating parameters with the help of response surface methodology. The effect of three independent variables such as hydrofluoric acid （HF） concentration （10-20% by vo!ume ）,. temper- ature （60-100 ~C）, and time （90-180 min）, for ash reduction from the low-grade coal was Investigated.. A quadratic model was proposed to correlate the independent variables for maximum ash reduction at the optimum process condition by using central composite design （CC.D）method. The study reveals that HF concentration was the most effective parameter for ash reduction in comparison with time and temper- ature. It may be due to the higher F-statistics value for HF concentration, which effects to large extent of ash reduction. The characterization of coal was evaluated by Fourier transform infrared spectroscopy （FTIR） analysis and Field-emission scanning electron microscopy with energy-dispersive X-ray （FESEM- EDX） analysis for confirmation of the ash reduction.

关键词： Low-grade coal Hydrofluoric acid (HF)Leaching Ash reduction response surface methodology

Modeling assessment of recovering iron from red mud by direct reduction： magnetic separation based on response surface methodology

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Journal of Iron and Steel Research International 2018年第5期25卷 497-505页

作者： Ran Wang Zheng-gen Liu Man-sheng Chu Hong-tao Wang Wei Zhao Li-hua Gao School of Metallurgy Northeastern UniversityShenyang 110819 Liaoning China Northeastern Institute of Metal Materials Co. LtdShenyang 110108 Liaoning China

Red mud, the waste generated during alumina production, contains iron and other valuable metals. To recover the iron efficiently from red mud, a three-factor five-level central composite design in response surface methodology was used to study the effects of process parameters, such as FC/O （the molar ratio of fixed carbon in coal to reducible oxygen of iron oxide in red mud）, reduction temperature, reduction time, and their interaction on the iron recovery rate and total iron content in magnetic product obtained from the process of direct reduction-magnetic separation. The relevant assessment model was established. The model could predict the changing rules of iron recovery rate and total iron content in the magnetic product affected by the process parameters. The results show that the iron recovery rate is significantly influenced by three factors and reduction temperature plays the most important role. The iron recovery rate and total iron content in magnetic product could be up to 98.37 and 82.52%, respectively, under the numerically optimal process parameters condition of reduction temperature of 1400 ℃, FC/O of 0.80 and reduction time of 100 min obtained by the assessment model. The predicted values are in good agreement with the experimental values.

关键词： Red mud - Iron recovery Direct reduction Magnetic separation response surface methodology

Optimization of the O_(3)/H_(2)O_(2) process with response surface methodology for pretreatment of mother liquor of gas field wastewater

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Frontiers of Environmental Science & Engineering 2021年第4期15卷 337-349页

作者： Haoran Feng Min Liu Wei Zeng Ying Chen College of Architecture and Environment Sichuan UniversityChengdu610065China

The present study reports the use of the O_(3)/H_(2)O_(2) process in the pretreatment of the mother liquor of gas field wastewater(ML-GFW),obtained from the multi-effect distillation treatment of the gas field *** range of optimal operation conditions was obtained by single-factor *** surface methodology(RSM)based on the central composite design(CCD)was used for the optimization procedure.A regression model with Total organic carbon(TOC)removal efficiency as the response value was established(R^(2)=0.9865).The three key factors were arranged according to their significance as:pH>H_(2)O_(2) dosage>ozone flow *** model predicted that the best operation conditions could be obtained at a pH of 10.9,an ozone flow rate of 0.8 L/min,and H_(2)O_(2) dosage of 6.2 *** dosing ratio of ozone was calculated to be 9.84 mg O3/mg *** maximum removal efficiency predicted was 75.9%,while the measured value was 72.3%.The relative deviation was found to be in an acceptable *** ozone utilization and free radical quenching experiments showed that the addition of H_(2)O_(2) promoted the decomposition of ozone to produce hydroxyl radicals(·OH).This also improved the ozone utilization *** chromatography-mass spectrometry(GC-MS)analysis showed that most of the organic matters in ML-GFW were degraded,while some residuals needed further *** study provided the data and the necessary technical supports for further research on the treatment of ML-GFW.

关键词： High salinity High organic matters Gas field wastewater O_(3)/H_(2)O_(2) response surface methodology

Performance Improvement of Two-Phase Steam Ejector based on CFD Techniques,response surface methodology and Genetic Algorithm

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Journal of Thermal Science 2024年第2期33卷 675-695页

作者： ZHANG Hao ZHAO Hongxia ZHANG Xiuao ZENG Hongxuan DENG Jianqiang School of Energy and Power Engineering Shandong UniversityJi’nan250061China School of Chemical Engineering and Technology Xi’an Jiaotong UniversityXi’an710049China

The steam ejector is a crucial component in the waste heat recovery *** performance determines the amount of recovered heat and system ***,poor ejector performance has always been the main bottleneck for system ***,this study proposes an optimization methodology to improve the steam ejector's performance by utilizing computational fluid dynamics(CFD) techniques,response surface methodology(RSM),and genetic algorithm(GA).Firstly,a homogeneous equilibrium model(HEM) was established to simulate the two-phase flow in the steam ***,the orthogonal test was presented to the screening of the key decision variables that have a significant impact on the entrainment ratio(ER).Next,the RSM was used to fit a response surface regression model(RSRM).Meanwhile,the effect of the interaction of geometric parameters on the performance of the steam ejector was ***,GA was employed to solve the RSRM's global optimal ER *** results show that the RSRM exhibits a good fit for ER(R^(2)=0.997).After RSM and GA optimization,the maximum ejector efficiency is 27.94%,which is 48.38% higher than the initial ejector of 18.83%.Furthermore,the optimized ejector efficiency is increased by 46.4% on average under off-design ***,the results reveal that the combination of CFD,RSM,and GA presents excellent reliability and feasibility in the optimization design of a two-phase steam ejector.

关键词： two-phase steam ejector optimization methodology CFD techniques response surface methodology genetic algorithm homogeneous equilibrium model