Optimization of Pyrolysis Technical Parameters for Cotton Stalk Based on Response Surface Methodology

2014 ◽  
Vol 541-542 ◽  
pp. 949-953
Author(s):  
Ying Yang ◽  
Wen Xuan Zheng
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Heating Rate ◽  
Pyrolysis Temperature ◽  
Biomass Conversion ◽  
Holding Time ◽  
Technical Parameters ◽  
Gaseous Products ◽  
Cotton Stalks ◽  
Liquid Products

Biomass pyrolysis is a good high-value process of biomass conversion. Study on the pyrolysis products of crushed cotton stalks pyrolysis experiments in the self-made airtight equipment. The effects of three factors (pyrolysis temperature,pyrolysis heating rate and pyrolysis holding time) were investigated by using the mass of the solid products yield as the indexes .Box-Benhnken design ( BBD ) and response surface methodology ( RSM) were adopted to obtain the optimum parameters on the basis of results of single-factor experiments.The results show that: when pyrolysis temperature is 500°C.the heating rate is 9°C/min and holding time is 1h,solid products yield 33.4123%, liquid products yield 36.5699%, and gaseous products yield 30.0178%.

scholarly journals Optimization of Sintering Process of Alumina Ceramics Using Response Surface Methodology

2021 ◽  
Vol 13 (12) ◽  
pp. 6739
Author(s):  
Darko Landek ◽  
Lidija Ćurković ◽  
Ivana Gabelica ◽  
Mihone Kerolli Mustafa ◽  
Irena Žmak
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Heating Rate ◽  
Sintering Temperature ◽  
Nonlinear Models ◽  
Slip Casting ◽  
Holding Time ◽  
Alumina Ceramics ◽  
Aqueous Suspensions ◽  
Temperature Heating

In this work, alumina (Al2O3) ceramics were prepared using an environmentally friendly slip casting method. To this end, highly concentrated (70 wt.%) aqueous suspensions of alumina (Al2O3) were prepared with different amounts of the ammonium salt of a polycarboxylic acid, Dolapix CE 64, as an electrosteric dispersant. The stability of highly concentrated Al2O3 aqueous suspensions was monitored by viscosity measurements. Green bodies (ceramics before sintering) were obtained by pouring the stable Al2O3 aqueous suspensions into dry porous plaster molds. The obtained Al2O3 ceramic green bodies were sintered in the electric furnace. Analysis of the effect of three sintering parameters (sintering temperature, heating rate and holding time) on the density of alumina ceramics was performed using the response surface methodology (RSM), based on experimental data obtained according to Box–Behnken experimental design, using the software Design-Expert. From the statistical analysis, linear and nonlinear models with added first-order interaction were developed for prediction and optimization of density-dependent variables: sintering temperature, heating rate and holding time.

scholarly journals A Response Surface Methodology (RSM) Approach for Optimizing the Attenuation of Human IgE-Reactivity to β-Lactoglobulin (β-Lg) by Hydrostatic High Pressure Processing

Foods ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1741
Author(s):  
Xin Sun ◽  
Jialing Vivien Chua ◽  
Quynh Anh Le ◽  
Francisco Trujillo ◽  
Mi-Hwa Oh ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Optimal Condition ◽  
Response Surface ◽  
High Pressure Processing ◽  
Molecular Structures ◽  
Holding Time ◽  
P Value ◽  
Molecular Change ◽  
Ige Reactivity ◽  
Β Lactoglobulin

The response surface methodology (RSM) and central composite design (CCD) technique were used to optimize the three key process parameters (i.e., pressure, temperature and holding time) of the high-hydrostatic-pressure (HHP) processing either standalone or combined with moderate thermal processing to modulate molecular structures of β-lactoglobulin (β-Lg) and α-lactalbumin (α-La) with reduced human IgE-reactivity. The RSM model derived for HHP-induced molecular changes of β-Lg determined immunochemically showed that temperature (temp), pressure (p2) and the interaction between temperature and time (t) had statistically significant effects (p < 0.05). The optimal condition defined as minimum (β-Lg specific) IgG-binding derived from the model was 505 MPa at 56 °C with a holding time of 102 min (R2 of 0.81 and p-value of 0.01). The validation carried at the optimal condition and its surrounding region showed that the model to be underestimating the β-Lg structure modification. The molecular change of β-Lg was directly correlated with HHP-induced dimerization in this study, which followed a quadratic equation. The β-Lg dimers also resulted in the undetectable human IgE-binding.

Optimization of Factors Influencing the Aspect Ratio of Mullite Whiskers Based on Single Factor Analysis and Response Surface Methodology

2012 ◽  
Vol 581-582 ◽  
pp. 782-785
Author(s):  
Bin Meng ◽  
Jin Hui Peng
Keyword(s):  
Response Surface Methodology ◽  
Aspect Ratio ◽  
Response Surface ◽  
Sintering Temperature ◽  
Raw Materials ◽  
Holding Time ◽  
Single Factor ◽  
Factors Influencing ◽  
Mullite Whiskers ◽  
Addition Amount

The mullite whiskers were synthesized from commercial raw materials by sintering in air. Three factors influencing the aspect ratio of whiskers, including sintering temperature, holding time and addition amount of V2O5, were analyzed based on single factor design and response surface methodology respectively. The optimum conditions for the synthesis of mullite whiskers with highest aspect ratio was obtained, i.e. sintering temperature was 1316.87°C, addition amount of V2O5 was 4.09wt.% and holding time was 1.96h. The experiment at the optimum condition was conducted and the real experimental value agrees to the predicted value based on response surface methodology.

scholarly journals Optimization to Hydrothermal Liquefaction of Low Lipid Content Microalgae Spirulina sp. Using Response Surface Methodology

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Xuan Wei ◽  
Dengfei Jie
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Lipid Content ◽  
Oil Production ◽  
Hydrothermal Liquefaction ◽  
Holding Time ◽  
Optimum Conditions ◽  
Bio Oil ◽  
Contour Plots ◽  
Central Composite

The production and nature of the biocrude obtained from Spirulina sp. by hydrothermal liquefaction (HTL) technology is focused in this investigation. Our aim is to evaluate the interaction of different factors on the bio-oil production through HTL using microalgae that contains relatively low lipid content and high protein. Optimization of three key parameters—concentration (mass of algae per mass of solvent), reaction temperature, and holding time—was carried out by response surface methodology (RSM). In this work, we used central composite design to conduct the experiment process. Graphical response surface and contour plots were used to locate the optimum point. The final results showed that the optimum concentration, temperature, and holding time were 10.5%, 357°C, and 37 min, respectively. Under the optimum conditions established, yield of the biocrude (41.6 ± 2.2%) was experimentally obtained using the fresh microalgae. This study showed the potential of bio-oil production of Spirulina sp. by HTL technology, but it still needs more improvement of the biocrude for utilization.

scholarly journals Optimasi Kadar Ultimate dan Tingkat Kebasaan Bio-arang Limbah Kayu Durian sebagai Pembenah Tanah

2021 ◽  
Vol 11 (02) ◽  
pp. 59
Author(s):  
Heri Soedarmanto ◽  
Evy Setiawaty ◽  
Taufik Iskandar
Keyword(s):  
Particle Size ◽  
Response Surface Methodology ◽  
Response Surface ◽  
Oil And Gas ◽  
Pyrolysis Temperature ◽  
Raw Materials ◽  
Wood Waste ◽  
Quadratic Model ◽  
Ph Optimum ◽  
Pyrolysis Of Biomass

Konversi biomassa melalui pirolisis menghasilkan bio-arang, bio-minyak dan gas. Pirolisis biomassa dipengaruhi oleh kondisi pirolisis seperti bahan baku dan suhu pirolisis. Tujuan dari penelitian ini adalah menganalisis kondisi optimum kadar ultimate (CHO) dan pH bio-arang berdasarkan ukuran partikel bahan baku limbah kayu durian dan suhu pirolisis sebagai pembenah tanah. Limbah kayu durian yang digunakan dalam penelitian ini berukuran diameter 0,17–0,42 mm; 0,42–1,00 mm; dan 1,00–2,83 mm, dengan variasi suhu pirolisis 350°C, 450°C, dan 550°C sebanyak tiga kali ulangan. Optimasi menggunakan metode Response Surface Methodology. Berdasarkan model kuadratik, didapatkan kadar karbon optimum bio-arang sebesar 81,78% dengan ukuran partikel bahan baku pada 2,09 mm dan suhu pirolisis 530,5oC. Kadar hidrogen optimum bio-arang sebesar 3,35% dengan ukuran partikel bahan baku 2,89 mm dan suhu pirolisis 547,4oC. Kadar oksigen optimum bio-arang sebesar 12,22% dengan ukuran partikel bahan baku 1,89 mm dan suhu pirolisis 529,5oC. pH optimum bio-arang sebesar 8,35 dengan ukuran partikel bahan baku 0,6 mm dan suhu pirolisis 521,8oC. Kondisi proses terbaik untuk menghasilkan kadar ultimate dan pH yang paling optimal berada pada range ukuran diameter bahan baku 0,6 mm–2,89 mm dan suhu pirolisis sebesar 521,8oC–547,4oC.  The Optimization of Ultimate Levels and Basicity of Durian Wood Waste Biochar as Soil AmendmentAbstractBiomass conversion through pyrolysis produces biochar, bio-oil and gas. Pyrolysis of biomass is influenced by pyrolysis conditions such as raw materials and pyrolysis temperature. The purpose of this study was to analyze the optimum conditions for ultimate levels (CHO) and pH of biochar based on the particle size of the durian wood waste and the pyrolysis temperature as soil amendment. Particle sizes of durian waste were 0.17–0.42 mm; 0.42–1.00 mm; and 1.00–2.83 mm in diameter where pyrolysis temperatures were 350°C; 450°C; and 550°C. Optimization was used by the Response Surface Methodology method. Based on the quadratic model, the optimum carbon content of biochar was 81.78% with the particle size at 2.09 mm and the pyrolysis temperature of 530.5oC. The optimum hydrogen content of biochar was 3.35% with a particle size of 2.89 mm and a pyrolysis temperature of 547.4oC. The optimum oxygen content of biochar was 12.22% with a particle size of 1.89 mm and a pyrolysis temperature of 529.5oC. The optimum pH of biochar was 8.35 with a particle size of 0.6 mm and a pyrolysis temperature of 521.8oC. The most optimal ultimate levels and pH were in the diameter size range of 0.6 mm-2.89 mm and pyrolysis temperature of 521.8oC-547.4oC.

Optimization of Biomass Vacuum Pyrolysis Process Based on GRNN

2013 ◽  
Vol 411-414 ◽  
pp. 3016-3022 ◽  
Author(s):  
Xiao Hua Li ◽  
Yong Sheng Fan ◽  
Yi Xi Cai ◽  
Wei Dong Zhao ◽  
Hai Yun Yin
Keyword(s):  
Heating Rate ◽  
Prediction Models ◽  
Pyrolysis Temperature ◽  
Holding Time ◽  
Raw Material ◽  
Energy Transformation ◽  
Transformation Ratio ◽  
Vacuum Pyrolysis ◽  
System Pressure ◽  
Bio Oil

Biomass pyrolysis for preparing bio-oil was studied on the vacuum pyrolysis system, where rape straw was chosen as the raw material. The experiment was designed by orthogonal method. And pyrolysis temperature, system pressure, heating rate and holding time were chosen as input variables to establish the prediction models about bio-oil yields and energy transformation ratio based on Generalized Regression Neural Network. The parameters of vacuum pyrolysis system were optimized for maximizing bio-oil yields and energy transformation ratio, and the optimization result was verified by experiment. The results of research show that the predicted values are fit well with the experimental values, which verifies the effectiveness of the prediction models. When pyrolysis temperature is 486.8°C, system pressure is 5.0kPa, heating rate is 18.1°C/min and holding time is 55.0min, bio-oil yield is 43.6% and energy transformation ratio is 35.5%. Both are close to the maximum, and the result is accurate by experimental verification.

scholarly journals Process Parameters Optimization of Gallic Acid Removal from Water by MIEX Resin Based on Response Surface Methodology

Processes ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 273 ◽  
Author(s):  
Qiang Zhou ◽  
Lei Ding ◽  
Yunhua Zhu ◽  
Meiying Zhong ◽  
Chuchu Yang
Keyword(s):  
Response Surface Methodology ◽  
Gallic Acid ◽  
Response Surface ◽  
Acid Concentration ◽  
Process Parameters ◽  
Regression Equation ◽  
Parameters Optimization ◽  
Solution Ph ◽  
Adsorption Time ◽  
Technical Parameters

In this work, the response surface methodology was used to optimize the process parameters of gallic acid adsorption on magnetic ion exchange (MIEX) resin. Based on Box-Behnken Design, a quadratic polynomial model equation including solution pH, gallic acid concentration, MIEX resin dosage and adsorption time was established. The reliability of the established regression equation was tested by variance analysis. Based on the regression equation, the technical parameters for gallic acid adsorption on MIEX resin were optimized and the effects of interaction between variables on the removal of gallic acid were analyzed. The results showed that the established regression equation was reliable and could effectively predict the removal of gallic acid. The optimal technical parameters were determined to be a pH of 9.17, a gallic acid concentration of 8.07 mg/L, a resin dosage of 0.98 mL/L and an adsorption time of 46.43 min. The removal efficiency of gallic acid was 97.93% under the optimal parameters. The interaction between pH and adsorption time had the most significant effect on the removal of gallic acid. The results of this study demonstrated that MIEX resin can remove gallic acid efficiently and relatively quickly under the condition of optimal technical parameters.

A New Method Designed Crimping Technical Parameter Using Response Surface Methodology

2013 ◽  
Vol 423-426 ◽  
pp. 955-961
Author(s):  
Li Feng Fan ◽  
Ying Gao ◽  
Jia Xin Yan ◽  
Jian Bin Yun
Keyword(s):  
Finite Element ◽  
Response Surface Methodology ◽  
Radial Basis Function ◽  
Response Surface ◽  
Basis Function ◽  
Polynomial Function ◽  
New Method ◽  
Surface Model ◽  
Technical Parameters ◽  
Radial Basis

Crimping is widely used in production of large diameter submerged-arc welding pipes. Traditionally, the designers obtain the technical parameters for crimping from experience or trial-errors by experiments. However, it is difficult to obtain the ideal crimping technical parameters with this method immediately at present. To tackle this problem, a new method coupled with response surface methodology and finite element method is proposed to design crimping technical parameters and save the design time of crimping. In this paper, the crimping forming process is simulated by finite element (FE) code ABAQUS. Taking the crimping of X80 steel Φ1219mm×22mm×12000mm welding pipe for instance, the simulation data from the arrangement of simulation which is constituted by the optimal latin hyper-cube sampling approach is treated as sample point. Four types of response surface methodology which included four-order polynomial function, orthogonal polynomial function, kriging and radial basis function is discussed, where the response surface model based on radial basis function is proved more efficient than other types of response surface methodology to construct surrogate model. The results showed a good agreement by a comparison with simulation results and remarkably predicted the crimping quality. Thus, the presented method of this research provides an effective path to design crimping parameters.

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