Char from the co-pyrolysis of Eucalyptus wood and low-density polyethylene for use as high-quality fuel: Influence of process parameters

2021 ◽  
pp. 148723
Author(s):  
Biswajit Samal ◽  
Kumar Raja Vanapalli ◽  
Brajesh Kumar Dubey ◽  
Jayanta Bhattacharya ◽  
Subhash Chandra ◽  
...  
Keyword(s):  
Process Parameters ◽  
Low Density Polyethylene ◽  
Low Density ◽  
High Quality ◽  
Influence Of Process Parameters ◽  
Eucalyptus Wood

scholarly journals Effects of process parameters on density and strength of cold briquetted sponge iron

2017 ◽  
Vol 20 (K6) ◽  
pp. 22-28
Author(s):  
Luu Van Dao ◽  
Cao Thanh Ta ◽  
Cuong Manh Chu ◽  
Hien Van Dinh
Keyword(s):  
Particle Size ◽  
High Pressure ◽  
Porous Structure ◽  
Process Parameters ◽  
Sponge Iron ◽  
Low Density ◽  
Pressing Pressure ◽  
Processing Parameter ◽  
High Quality ◽  
Optimal Processing

Sponge iron has been widely used for melting high-quality steels. However, there are several disadvantages of using sponge iron to melt steels, e.g boiling and furnace’s wall wearing strongly... which leads to a reduction in life duration of furnace due to its porous structure and low density. The solutions for overcoming these disadvantages are rising the density and reducing the purity of sponge iron by compacting particles of sponge iron to briquets in a high pressure and using a suitable binder. In this paper, the effects of pressing pressure, particle size, a fraction of binder and baking temperature on the density and strength of the sponge iron briquet using hydraulic machine were investigated. The process parameters range to obtain the sponge iron briquet with the density over 3.5 g/cm3 were found, and the optimal processing parameter range for maximizing the compacting strength of the sponge iron briquet was determined.

Study of Flow Font Advancement during Filling Stage of a Spiral Mold

2013 ◽  
Vol 371 ◽  
pp. 534-538 ◽  
Author(s):  
Ionut Laurentiu Sandu ◽  
Felicia Stan ◽  
Catalin Fetecau
Keyword(s):  
Numerical Simulations ◽  
Process Parameters ◽  
High Density Polyethylene ◽  
Injection Pressure ◽  
Mold Temperature ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Flow Front ◽  
Melt Temperature

The objective of this paper consists in the determination of the flow front length using o circular spiral mold. The paper also studies the influence of the process parameters on the flow front length using the method of statistical analysis. For this purpose, a number of numerical simulations are carried out by utilizing the combination of four process parameters (i.e., the melt temperature, the spiral thickness, the injection pressure and the mold temperature) at three levels. In order to reduce the number of numerical simulations, a simplistic Taguchi L27orthogonal array was chosen. The material chosen for this study was a low density polyethylene and a high density polyethylene. The flow front length was measured through a marked pattern of the circular spiral using the AutoCAD.

OPTIMIZATION OF INJECTION PROCESS PARAMETERS OF PLASTIC REINFORCED COMPOSITES USING RESPONSE SURFACE METHODOLOGY AND CENTRAL COMPOSITE DESIGN

2021 ◽  
Author(s):  
ADEFEMI O. ADEODU ◽  
MUKONDELELI G. KANAKANA-KATUMBA ◽  
RENDANI W. MALADZHI ◽  
ILESANMI A. DANIYAN
Keyword(s):  
Tensile Strength ◽  
Process Parameters ◽  
Injection Pressure ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Reinforced Composites ◽  
Microstructural Properties ◽  
Cavity Pressure ◽  
Injection Parameters ◽  
Central Composite

The injection molding process is among the most efficient processes for mass production of polymer products with complex geometry at optimal cost. This study investigates the effect of the injection parameters on the cavity pressure, tensile and microstructural properties of plastic-reinforced composites and optimized the process to determine the optimum injection parameters using the Response Surface Methodology and central composite design. The two polymer composite materials used for this work are low-density polyethylene reinforced with aluminium powder (LDPE/Al) and low-density polyethylene reinforced with carbon black (LDPE/CB) at 250 and 200oC injection temperature respectively. The analysis of the results obtained from both the numerical and physical experimentations were used to obtain two predictive models which correlate cavity pressure and tensile strength as a function of the independent process parameters namely, injection pressure and time. An injection pressure of 70 MPa and time of 1.00 sec was found to be optimum producing a cavity pressure of 37.658 MPa while an injection pressure of 70 MPa and time of 1.75 sec was found to be optimum producing a material with tensile strength of 7.41 MPa. The results indicate that the cavity pressure increases with an increase in the injection pressure but decreases with an increase in the injection time for the two analyzed polymer composites. The study shows that process parameters have significant effects on the cavity pressure, mechanical and microstructural properties of LDPE/Al and LDPE/CB.

scholarly journals WOOD GASIFICATION. INFLUENCE OF PROCESS PARAMETERS ON THE TAR FORMATION AND GAS CLEANING

Detritus ◽  
2021 ◽  
pp. 63-74
Author(s):  
Marek Dudynski
Keyword(s):  
Process Parameters ◽  
Producer Gas ◽  
Gas Purification ◽  
High Quality ◽  
Influence Of Process Parameters ◽  
Gas Cleaning ◽  
Tar Removal ◽  
Purification Unit ◽  
Pre Treatment ◽  
Gasification Plant

We present an analysis of influence of biomass pre-treatment and change of gasifying agent on the performance of an oxygen-steam-air updraft gasification plant and a technological process capable of delivering high quality producer gas. The results of these changes on composition of tar collected with absorption type gas purification unit, designed for dust and tar removal are also reported.

Quantitative defect studies in semiconductor TEM samples prepared by low angle ion milling

1995 ◽  
Vol 53 ◽  
pp. 512-513
Author(s):  
L. Mulestagno ◽  
J.C. Holzer ◽  
P. Fraundorf
Keyword(s):  
Sample Preparation ◽  
Milling Time ◽  
High Density ◽  
Low Density ◽  
Ion Milling ◽  
High Quality ◽  
Variable Angle ◽  
Major Disadvantage ◽  
Induced Defects

Due to the wealth of information, both analytical and structural that can be obtained from it TEM always has been a favorite tool for the analysis of process-induced defects in semiconductor wafers. The only major disadvantage has always been, that the volume under study in the TEM is relatively small, making it difficult to locate low density defects, and sample preparation is a somewhat lengthy procedure. This problem has been somewhat alleviated by the availability of efficient low angle milling.Using a PIPS® variable angle ion -mill, manufactured by Gatan, we have been consistently obtaining planar specimens with a high quality thin area in excess of 5 × 104 μm2 in about half an hour (milling time), which has made it possible to locate defects at lower densities, or, for defects of relatively high density, obtain information which is statistically more significant (table 1).

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