2024-03-29T23:38:34Z
https://jpst.irost.ir/?_action=export&rf=summon&issue=41
Journal of Particle Science and Technology
JPST
2423-4087
2423-4087
2015
1
3
A Review of Manufacturing Process of Polyethylene Pipe and Connectors for Applying in High-Pressure Natural Gas Pipelines
Omid
Moini Jazani
Reyhaneh
Khalafi
Mohammad
Khosravi
Mohammad Reza
Hassanpour
Danial
Dadkhah
Mehdi
Mostafaeian
Mohammad Mahdi
Salehi
Hossein
Riazi
In this article various pipes used for transporting of gas are introduced and pros and cons of each one are elucidated. The pipes are categorized in three different subgroups including metallic, polymeric and metallic-wire reinforced polymeric pipes. Metallic-wire reinforced polymeric pipes are nominated as the best option for usage in high pressure pipelines transporting natural gas. As a result, some information about major manufacturers of this kind of polymeric pipes, raw material, production process and metallic-wire orientation are presented. Finally, from economical point of view, some calculations are done to estimate required amount of polymer and metallic-wire to manufacture such pipes. It is also possible to compare their manufacturing cost with usual metallic and polymeric pipes.
different pipes
Gas transportation
high pressure
reinforced polyethylene
metal wire
2015
09
01
129
140
https://jpst.irost.ir/article_136_031163d1ee3d9486ce4b0d99cf632a87.pdf
Journal of Particle Science and Technology
JPST
2423-4087
2423-4087
2015
1
3
MHD Three-Dimensional Stagnation-Point Flow and Heat Transfer of a Nanofluid over a Stretching Sheet
Aboutaleb
Ghadami Jadval Ghadam
Abed
Moradi
In this study, the three-dimensional magnetohydrodynamic (MHD) boundary layer of stagnation-point flow in a nanofluid was investigated. The Navier–Stokes equations were reduced to a set of nonlinear ordinary differential equations using a similarity transform. The similarity equations were solved for three types of nanoparticles: copper, alumina and titania with water as the base fluid, to investigate the effect of the nanoparticle volume fraction parameter (ϕ), the magnetic parameter (M), the Prandtl number (Pr) and the velocity ratio parameter (ε) on the flow and heat transfer characteristics. The skin-friction coefficient and Nusselt number as well as the velocity and temperature profiles for some values of the governing parameters were presented graphically and discussed. Effects of the solid volume fraction on the flow and heat transfer characteristics were thoroughly examined. It was observed that, for all three nonoparticles, the magnitude of the skin friction coefficient and local Nusselt number increases with enhancement in the nanoparticle volume fraction (ϕ). In addition, the velocity of fluid increases by increasing M and ε and the temperature increases by decreasing M, ε and Pr. The highest values of the skin friction coefficient and the local Nusselt number were obtained for the Cu nanoparticles compared to Al2O3 and TiO2.
Nanofluid
nanoparticles
Stagnation-point flow
MHD
Stretching plate
2015
09
01
141
151
https://jpst.irost.ir/article_178_b111587e7f302407183c17ece5fa0ad7.pdf
Journal of Particle Science and Technology
JPST
2423-4087
2423-4087
2015
1
3
An experimental investigation on drying kinetics of calcium carbonate
Sadegh
Beigi
Mohammad Amin
Sobati
Amir
Charkhi
Calcium carbonate is a versatile mineral with diverse industrial applications. Drying is a necessary processing step in preparation of calcium carbonate product. Deep knowledge of drying kinetics is required in order to design an appropriate dryer. The main aim of the present study was to investigate the drying kinetics of calcium carbonate, experimentally. Thirteen empirical correlations with temperature-dependent constants were used to describe the thin-layer drying behavior of calcium carbonate. The correlation fitting results revealed that all examined empirical correlations were acceptable. But, the Page correlation was in the best agreement with experimental data. The effective moisture diffusivity was calculated within 8.61 × 10-9 to 10.40 × 10-9m2s-1 in the temperature range of 60 to 90˚C. The drying activation energy was also calculated to be 6.306 kJmol-1. The fitted correlations for the drying kinetics of calcium carbonate can be used to design an industrial dryer and also to estimate drying time in various drying conditions.
Calcium carbonate
Effective moisture diffusivity
Thin-layer drying
Drying rate
Empirical correlation
2015
09
01
153
162
https://jpst.irost.ir/article_219_885c64138fa80a1ec170ff21fc394afe.pdf
Journal of Particle Science and Technology
JPST
2423-4087
2423-4087
2015
1
3
Synthesis and characterization of Polyaniline Nanocomposite by Using Several Types of Surfactants in Aqueous Media
Mohsen
Mehdipourghazi
Millad
Hallajighomi
Farshad
Varaminian
Polyaniline (PANI) nanocomposite has been successfully prepared in aqueousmedia by the chemical polymerization of aniline with ammonium peroxydisulphateas an initiator in the presence of a steric stabilizer such as sodium dodecylbenzenesulfonate(DBSNa), Poly(vinyl pyrrolidone) (PVP), poly(vinyl alcohol)(PVA), poly(ethylene glycol) (PEG) and hydroxypropylcellulose (HPC). Thechemical structure, morphology, thermal stability and thermal degradation of thesynthesized PANI nanocomposite were studied by different techniques such asfourier transform infrared spectroscopy (FTIR), scanning electron microscope(SEM), X-ray diffraction (XRD) and four-probe. The results revealed that surfactantdispersed uniformly in polyanilin matrix and made a nanocomposite withaverage crystallite size about 74 nm.
Nanocomposite
Conductive polymer
Surfactant
morphology
Chemical structure
2015
09
01
163
170
https://jpst.irost.ir/article_221_0a895be5a42938826d7b8dc05fa1b3c4.pdf
Journal of Particle Science and Technology
JPST
2423-4087
2423-4087
2015
1
3
Evaluation of the effect of granulation processing parameters on the granule properties: Lactose- Cornstarch case study
Salman
Movahedirad
Elham
Heydari
Mohammad Amin
Sobati
Understanding the relationship between processing parameters of fluidized bed wet granulation and the characteristics of intermediate and final products is crucial in the pharmaceutical processes. This research examined a fluidized bed wet granulation process containing a cornstarch solution as binder and lactose particles as powder. The design of experiment (DoE) was performed according to an L9 Taguchi method with three replications. The variables considered in the experimental design were binder flow rate, drying air temperature, spraying pressure, and initial mass of particle. The physical properties of the granules were evaluated in terms of granule mean size and granule size uniformity. A predictive model for each individual response was proposed. In addition, optimum conditions for each response were also obtained. Finally, the effect of the granule mean size on the flowability of granules was also investigated.
Fluidized Bed Granulation
Taguchi method
Granule Mean Size
Size Distribution
Flowability
2015
09
01
171
182
https://jpst.irost.ir/article_222_6bf74d0d4f545ec9a5e3da31422b37d9.pdf
Journal of Particle Science and Technology
JPST
2423-4087
2423-4087
2015
1
3
Synthesis and structural properties of Polyvinylpyrrolidone based nanocomposite hydrogels for isoniazid drug delivery
Hassan
FathinrjadJirandehi
Maryam
adimi
Mokhtar
Heydari Naqdali
In this study, several examples of hydrogels and nanocomposite hydrogels based on PVP with different content of montmorillonite nanoclay were prepared. Then, the swelling of hydrogels and kinetics of drug delivery of hydrogel in an environment similar to the body (pH 7.4) were examined. The effect of nanoparticle different percentages on the hydrogel was clearly observed. Then kinetics of drug (Isoniazid) delivery for various samples of hydrogel with nanoparticles and without nanoparticles were obtained via Peppas and Higuchi models. The comparison of Peppas model results with experimental data showed that nanocomposite with 4% nanoclay exhibited better compliance. The morphology and microstructure of the prepared nanocomposites were studied by FT-IR, XRD and SEM.
Hydrogel nanocomposite
Polyvinylpyrrolidone
Swelling
Controlled release
Isoniazid
2015
09
01
183
193
https://jpst.irost.ir/article_263_0e67549082a0feb9ead10f889fea31e1.pdf