Characterization of Hydrocarbon Emissions from Green Sand Foundry Core Binders by Analytical Pyrolysis

2007 ◽  
Vol 41 (22) ◽  
pp. 7922-7927 ◽  
Author(s):  
Yujue Wang ◽  
Fred S. Cannon ◽  
Magda Salama ◽  
Jeff Goudzwaard ◽  
James C. Furness
Keyword(s):  
Hydrocarbon Emissions ◽  
Analytical Pyrolysis ◽  
Green Sand

Structural characterization of milled wood lignins from different eucalypt species

Holzforschung ◽  
2008 ◽  
Vol 62 (5) ◽  
Author(s):  
Jorge Rencoret ◽  
Gisela Marques ◽  
Ana Gutiérrez ◽  
David Ibarra ◽  
Jiebing Li ◽  
...  
Keyword(s):  
Eucalyptus Globulus ◽  
Chemical Structure ◽  
2D Nmr ◽  
Analytical Pyrolysis ◽  
Additional Information ◽  
Diaryl Ether ◽  
Heteronuclear Single Quantum Correlation ◽  
Relative Abundances ◽  
Type 3

Abstract The chemical structure of milled-wood lignins from Eucalyptus globulus, E. nitens, E. maidenii, E. grandis, and E. dunnii was investigated. The lignins were characterized by analytical pyrolysis, thioacidolysis, and 2D-NMR that confirmed the predominance of syringyl over guaiacyl units and only showed traces of p-hydroxyphenyl units. E. globulus lignin had the highest syringyl content. The heteronuclear single quantum correlation (HSQC) NMR spectra yielded information about relative abundances of inter-unit linkages in the whole polymer. All the lignins showed a predominance of β-O-4′ ether linkages (66–72% of total side-chains), followed by β-β′ resinol-type linkages (16–19%) and lower amounts of β-5′ phenylcoumaran-type (3–7%) and β-1′ spirodienone-type linkages (1–4%). The analysis of desulfurated thioacidolysis dimers provided additional information on the relative abundances of the various carbon-carbon and diaryl ether bonds, and the type of units (syringyl or guaiacyl) involved in each of the above linkage types. Interestingly, 93–94% of the total β-β′ dimers included two syringyl units indicating that most of the β-β′ substructures identified in the HSQC spectra were of the syringaresinol type. Moreover, three isomers of a major trimeric compound were found which were tentatively identified as arising from a β-β′ syringaresinol substructure attached to a guaiacyl unit through a 4-O-5′ linkage.

Characterization of Waste and Reclaimed Green Sand Used in Foundry Processing

Silicon ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 677-691
Author(s):  
Mohd Moiz Khan ◽  
Manvendra Singh ◽  
G. N. Jadhav ◽  
S. M. Mahajani ◽  
Shashank Mandre
Keyword(s):  
Green Sand

Rheological Characterization of Green Sand Flow

2016 ◽  
Author(s):  
Masoud Jabbari ◽  
Jon Spangenberg ◽  
Emil Hovad ◽  
Raphaël Comminal ◽  
Jesper H. Hattel ◽  
...  
Keyword(s):  
Casting Process ◽  
Dynamics Model ◽  
Green Sand ◽  
Rheological Characterization ◽  
Flow Rates ◽  
Computational Fluid Dynamics Model ◽  
Sand Flow ◽  
Rheological Experiments ◽  
Metal Castings

The main aim of this paper is to characterize experimentally the flow behaviour of the green sand that is used for casting of sand moulds. After the sand casting process is performed, the sand moulds are used for metal castings. The rheological properties of the green sand is important to quantify as they can be used to evaluate whether the casting process will be successful. In addition, the properties can potentially be implemented in a computational fluid dynamics model which can be used as a tool to optimize the process. The rheological experiments are carried out on a MCR 502 rheometer with a new module for characterizing granular materials. The new module enables viscosity measurements of the green sand as function of the shear rate at different flow rates, i.e. 0, 2, 4, 6, 8, 10, 12 and 15 L/min. The results show generally that the viscosity decreases with both the shear- and flow rate. In addition, the measurements show that the green sand flow follows a shear-thinning behaviour even after the full fluidization point.

Ashes to ashes: Characterization of organic matter in Andosols along a 3400 m elevation transect at Mount Kilimanjaro using analytical pyrolysis

CATENA ◽  
2019 ◽  
Vol 180 ◽  
pp. 271-281
Author(s):  
Joscha N. Becker ◽  
Michaela A. Dippold ◽  
Andreas Hemp ◽  
Yakov Kuzyakov
Keyword(s):  
Organic Matter ◽  
Analytical Pyrolysis ◽  
Mount Kilimanjaro

Characterization of Sago Palm (Metroxylon sagu) Lignin by Analytical Pyrolysis

2001 ◽  
Vol 49 (4) ◽  
pp. 1840-1847 ◽  
Author(s):  
Ken-ichi Kuroda ◽  
Tetsuo Ozawa ◽  
Takahiro Ueno
Keyword(s):  
Analytical Pyrolysis ◽  
Sago Palm ◽  
Metroxylon Sagu
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