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Thermal and thermo-catalytic degradation of polyolefins as a simple and efficient method of landfill clearing

Thermal and thermo-catalytic degradation of polyolefins as a simple and efficient method of landfill clearing

Thermal degradation of the low density polyethylene (LDPE), polypropylene (PP) and the municipal waste plastics was investigated. The thermo-catalytic degradation of LDPE and PP was studied in the presence of the following catalysts: four different types of montmorillonite: K5, K10, K20, K30 and - for comparison - zeolites (natural - clinoptilolite, YNa+ and YH+). Thermal analyses TG-DTA-MS of polymers and polymer-catalyst mixtures were carried out in an argon flow atmosphere in isothermal and dynamic conditions. The following order was found: in lowering the reaction temperature for LDPE degradation YH+ > mK5 > mK20 = mK30 >mK10 > NZ > YNa+; for PP degradation: mK20 > mK5 = mK30 >mK10 > YH+ > NZ > YNa+. The activity tests were carried out in a stainless steel batch reactor under atmospheric pressure in a wide temperature range of up to 410°C, and using the atmosphere of argon flow. The liquid products were analysed by the GC-MS method. The hydrocarbons in the liquid products from thermal degradation of polymers were broadly distributed in the carbon fractions of C8 to C26 - for LDPE and C6 to C31 for PP.

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Constitutive Modelling of Damage Evolution and Martensitic Transformation in 316L Stainless Steel

, 80, 229-253. 30. Murakami S. ( 2012), Continuum damage mechanics: A continuum mechanics approach to the analysis of damage and fracture , Springer: Dordrecht, Heidelberg, London, New York. 31. Narutani T., Olson G.B., Cohen M. (1982), Constitutive flow relations for austenitic steels during strain-induced martensitic transformation, Journal de Physique , Colloque C4, 12, 43, 429-434. 32. Olson G.B., Cohen M . (1975) Kinetics of strain-induced martensitic nucleation, Metallurgical Transactions , 6A, 791-795. 33. Rabotnov Yu. N. (1968

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Numerical Strength Analysis of a Complex, Steel Shell Structure/ Numeryczna Analiza Wytrzymałosciowa Pewnej Złożonej, Stalowej Konstrukcji Powłokowej

References 1. Gere J. M.: Mechanics of materials, Brooks/Cole, 2001. 2. ABAQUS, Inc., Analysis User’s Manual, Abaqus 2006. 3. COSMOS/M, Finite Element Analysis System, Version 2.9, Structural Research and Analysis Corporation, Electronic Manual, Los Angeles, California, 2002. 4. ROBOT MILLENNIUM, User’s electronic manual. Kraków, 2007. 5. PN-90/B-03200 Steel structures. Static calculations and design

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Temper Bead Welding of S460N Steel in Wet Welding Conditions

., Feng J., Wang G.: Effect of water flow on the arc stability and metal transfer in underwater flux-cored wet welding. Journal of Materials Processing Technology. 31 (2018), 103-115. 15. Shi Y., Hu Y., Yi Y., Lin S., Li Z.: Porosity and microstructure of underwater wet FCAW of duplex stainless steel. Metallography, Microstructure, and Analysis. 6(5) (2017), 383-389. 16. Fydrych D., Łabanowski J., Tomków J., Rogalski G.: Cold cracking of underwater wet welded S355G10+N high strength steel. Advances in Materials Science. 15(3) (2015), 48-56. 17

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Simulation Process Deep Drawing of Tailor Welded Blanks DP600 and BH220 Materials in Tool With Elastic Blankholder

References [1] L. B Kinsey, X. Wu. Tailor-welded blanks for advanced manufacturing. Woodhead publishing, ISBN 978-0-85709-385-1, Cambridge, 2011. [2] E. Evin, M. Tomáš. Comparison of deformation properties of steel sheets for car body parts. Procedia Engineering 2012 (48), 115 - 122. [3] J. Bílik, M. Balážová, Ľ. Kršiaková, R. Šuba. The analyssis of properties and forming duplex steel DP 450. Hutnícke listy 2010 (63), No. 4, 74 - 77. [4] E. Evin. Design of dual phase high strength steels sheets

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Simulations and Measurements of Eddy Current Magnetic Signatures

Abstract

Eddy current magnetic signature is, together with magnetization of ferromagnetic hull, mechanisms and devices on board, corrosion related and stray field sources one of the main sources of ship’s magnetic signature. Due to roll, pitch and yaw of the ship in external magnetic field, eddy currents are induced in conducting materials on board ship, mainly in conducting hull. Flow of those currents is a source of magnetic field around a ship. Principal eddy current component is related to roll movement as it depends on rate of change of external field which is the highest for roll. Induced currents have both in-phase and quadrature components. Magnitude of the eddy current magnetic field can have significant effect on total magnetic field signature after degaussing for ships such as mine sweepers and mine hunters. Paper presents calculations and simulations as well as measurements of model and physical scale model made of low magnetic steel performed in Maritime Technology Center. Contribution of eddy current magnetic field in total field in low roll frequencies has been estimated.

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Experimental Study of Multi-Ribbed One-Way Composite Slabs Made of Steel Fibre, Foam, and Normal Concrete

fibre reinforced cementitious composites: the role of ‘‘casting-flow induced’’ fibre orientation. Mater Struct 2011;44(1):109-28. 17. Luca Facconi , Fausto Minelli , Giovanni Plizzari. Steel fibre reinforced self-compacting concrete thin slabs - Experimental study and verification against Model Code 2010 provisions.Engineering Structures 122 (2016) 226-237 18. Yousheng Tao. Analysis on energy saving effect of aerated concrete building [J]. NEW BUILDING MATERIALS 2005(01) (in Chinese). 19. Zhouhong Zhang, Feng Liu, Lijuan

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Prediction Of Mechanical Properties Of Quench Hardening Steel

Materials Processing Technology, 155–165, 1324–1329. doi: 10.1016/j.jmatprotec.2004.04.192. Buczek A, Telejko T (2013): Investigation of heat transfer coefficient during quenching in various cooling agents. International Journal of Heat and Fluid Flow, 44, 258–264. doi: 10.1016/j.ijheatfluidflow.2013.07.004. Cao P, Liu G, Wu K (2012): Numerical simulation and analysis of heat treatment of large-scale hydraulic steel gate track. International Journal of Material and Mechanical Engineering, 1, 16–20. doi: 10.3882/j.issn.1674-2370.2013.04.006. Chotěborský R

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The influence of chemical composition on the dimensions

., ParasharS. K. S., Enhancement of heat transfer by water-Al2O3and water-TiO2nanofluids jet impingement in cooling hot steel surface, Journal of Experimental Nanoscience, 11(16), (2016) 1253-1273, http://dx.doi.org/10.1080/17458080.2016.1209789 [4] KimH., DeWittG., McKrellT., BuongiornoJ., HuL., On the quenching of steel and zircaloy spheres in water-based nanofluids with alumina, silica and diamond nanoparticles, International Journal of Multiphase Flow,35(5),(2009)427 -438,doi: 10.1016/j.ijmultiphaseflow.2009.02.004. [5] PN-EN 10277

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Image Based Analysis of Complex Microstructures of Engineering Materials

References Armstrong R.W. (1983). The Yield and Flow Stress Dependence on Polycrystal Grain Size, Yield, Flow and Fracture of Polycrystals , Applied Science Publishers, London. Baddeley A.J., Gundersen H.J.G. and Cruz-Orive L.M. (1986). Estimation of surface area from vertical sections, Journal of Microscopy 142 : 259-276. Hall E. O. (1951). The Deformation and Ageing of Mild Steel: III Discussion of Results, Proceedings of the Royal Society B64 (9): 747

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