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Pyrolysis of Kapton® in Air: An in situ DRIFT Study
Applied Spectroscopy, 2001Diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy was used to study the pyrolysis of polyimide (Kapton®). The samples were prepared in a KBr matrix, which did not show pronounced interferences, such as increased emissivity, during the measurements.
Ortelli, E. E. +3 more
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In Situ NMR Characterization of Pyrolysis Oil during Accelerated Aging
ChemSusChem, 2012COMING OF AGE: A method for investigating the accelerated aging of biomass pyrolysis oils is reported. The in situ NMR investigation, done by using quantitative ¹H, ¹³C NMR and heteronuclear single-quantum correlation (HSQC)-NMR techniques, reveals the chemical structural changes of pyrolysis oil during the aging process, providing insight into the ...
Haoxi, Ben, Arthur J, Ragauskas
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In situ Observation of Radicals and Molecular Products During Lignin Pyrolysis
ChemSusChem, 2014AbstractLignin pyrolysis is a promising method for the sustainable production of phenolic compounds from biomass. However, detailed knowledge about the radicals involved in this process and their influence on the molecular products is missing. Herein, we report on the pyrolysis of hard‐ and softwood Klason lignins under inert gas conditions in a ...
Bährle C +4 more
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In-situ and ex-situ upgrading of pyrolysis vapors from beetle-killed trees
Fuel, 2016Abstract In this article, we systematically studied the effects of several parameters on the product yield and selectivity for the in-situ and ex-situ upgrading of pyrolysis vapors from beetle-killed trees using a micro-pyrolyzer equipped with an online GC/MS/FID. HZSM-5 was used as catalyst for both processes.
Guanqun Luo, Fernando L.P. Resende
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Journal of Analytical and Applied Pyrolysis, 1995
Abstract Lignin, a major biopolymer in vascular plants, is shown to undergo thermochemolysis reactions when subjected to flash pyrolysis with in situ methylation using tetramethylammonium hydroxide. The product distribution, composed of methylated lignin monomers, implies that the thermochemolysis involves cleavage of the β-O-4 ether bonds in the ...
Daniel E. McKinney +4 more
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Abstract Lignin, a major biopolymer in vascular plants, is shown to undergo thermochemolysis reactions when subjected to flash pyrolysis with in situ methylation using tetramethylammonium hydroxide. The product distribution, composed of methylated lignin monomers, implies that the thermochemolysis involves cleavage of the β-O-4 ether bonds in the ...
Daniel E. McKinney +4 more
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Fuel, 2018
Abstract Baiyinhua coal was subjected to catalytic pyrolysis over HZSM-5 and Ni-modified HZSM-5 (Ni/HZSM-5) with a novel pyrolysis time-of-flight mass spectrometers (Py-TOF-MS) equipped with vacuum ultraviolet photoionization (VUVPI). The soft ionization of VUVPI allowed the detection of volatile organic compounds.
Zhiwei Shi +5 more
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Abstract Baiyinhua coal was subjected to catalytic pyrolysis over HZSM-5 and Ni-modified HZSM-5 (Ni/HZSM-5) with a novel pyrolysis time-of-flight mass spectrometers (Py-TOF-MS) equipped with vacuum ultraviolet photoionization (VUVPI). The soft ionization of VUVPI allowed the detection of volatile organic compounds.
Zhiwei Shi +5 more
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Sixth International Conference Metalorganic Vapor Phase Epitaxy, 1992
Abstract The decomposition of arsine at atmospheric pressure as studied by in-situ and ex-situ Fourier transform infrared spectroscopy (FTIR) is presented, comparing the techniques. Ex-situ spectroscopic and spectrometric evidence for the formation of methylarsine and dimethylarsine during the reaction of trimethylgallium and arsine, and in-situ ...
S.R. Armstrong +6 more
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Abstract The decomposition of arsine at atmospheric pressure as studied by in-situ and ex-situ Fourier transform infrared spectroscopy (FTIR) is presented, comparing the techniques. Ex-situ spectroscopic and spectrometric evidence for the formation of methylarsine and dimethylarsine during the reaction of trimethylgallium and arsine, and in-situ ...
S.R. Armstrong +6 more
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Kinetic modeling of ex-situ biomass catalytic pyrolysis
Materials Today: Proceedings, 2018Abstract Core objective of this study is the development and evaluation of a kinetic modeling strategy that is able to predict product yields (based on reaction lumps) during the ex-situ biomass catalytic pyrolysis. A series of experiments was initially performed in two interconnected reactors (thermal pyrolysis and catalytic upgrading) at the pilot ...
D. Ipsakis +5 more
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In situ infrared observation of the pyrolysis process of carbon aerogels
Journal of Non-Crystalline Solids, 1998Abstract Carbon aerogels are generated by a pyrolytic transformation of organic recorcinol formaldehyde aerogels in an inert atmosphere at temperatures above 600°C. Transmittance and emissivity in the infrared were measured between 1.4 and 18.0 μm using a Bruker IFS 66v spectrometer with an attached heatable transmittance/emissivity module which can ...
J. Kuhn +4 more
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In-situ imaging of RTV silicone pyrolysis
AIAA AVIATION 2023 Forum, 2023Collin Foster +2 more
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