Results 201 to 210 of about 114,749,788 (242)

Analysis of proteinaceous binders by in-situ pyrolysis and silylation

Chromatographia, 2003
Pyrolysis coupled with gas chromatography and mass spectrometry (Py-GC-MS) is a useful technique for rapid characterization of the organic materials used in art. In the characterization of proteinaceous binders fragments from pyrolysis are of low intensity. Milk, casein, and glue, for example, are sometimes difficult to detect. In the work discussed in
G. Chiavari, G. Lanterna, C. Luca, M. Matteini, S. Prati, I. C. A. Sandu   +5 more
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In-situ kerogen extraction via combustion and pyrolysis

Journal of Petroleum Science and Engineering, 2017
Abstract The extraction of organic kerogen from the vast oil shale reserves in Green River, Utah is limited owing to the environmental and technical challenges. This study compares the efficiency of combustion and pyrolysis to extract the kerogen from shale, in terms of organic thermal decomposition temperature, heating rates, and activation energy ...
Taniya Kar, Berna Hascakir
openaire   +1 more source

In-situ pyrolysis kinetic analysis and fixed-bed pyrolysis behavior of ex-service wind turbine blades

Waste Management, 2023
After the peak of rapid wind power development, a large amount of wind turbine blades reach/exceed their service life due to aging or damage. These ex-service wind turbine blades (EWTB) will increase the issue of its high-efficient utilization in the future decades.
Yuqing, Wu, Zefeng, Ge, Chen, Huang, Zhenting, Zha, Mingxun, Zeng, Yuna, Ma, Lijuan, Sun, Zenghui, Hou, Sheng, Chu, Huiyan, Zhang   +9 more
openaire   +2 more sources

In-situ and ex-situ catalytic upgrading of vapors from microwave-assisted pyrolysis of lignin

Bioresource Technology, 2018
In-situ and ex-situ catalytic upgrading with HZSM-5 of vapors from microwave-assisted pyrolysis of lignin were studied. The in-situ process produced higher bio-oil and less char than ex-situ process. The gas yield was similar for both processes. The ex-situ process had higher selectivity to aromatics and produced more syngas and less CO2 than the in ...
Liangliang, Fan, Paul, Chen, Nan, Zhou, Shiyu, Liu, Yaning, Zhang, Yuhuan, Liu, Yunpu, Wang, Muhammad Mubashar, Omar, Peng, Peng, Min, Addy, Yanling, Cheng, Roger, Ruan   +11 more
openaire   +2 more sources

Pyrolysis of Kapton® in Air: An in situ DRIFT Study

Applied Spectroscopy, 2001
Diffuse 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., Geiger, F., Lippert, T., Wokaun, A.   +3 more
openaire   +2 more sources

In Situ NMR Characterization of Pyrolysis Oil during Accelerated Aging

ChemSusChem, 2012
COMING 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
openaire   +2 more sources

In situ Observation of Radicals and Molecular Products During Lignin Pyrolysis

ChemSusChem, 2014
AbstractLignin 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, Christian, Custodis, Victoria, Jeschke, Gunnar, van Bokhoven, Jeroen A., Vogel, Frédéric   +4 more
openaire   +4 more sources

In-situ and ex-situ upgrading of pyrolysis vapors from beetle-killed trees

Fuel, 2016
Abstract 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
openaire   +1 more source

In-situ analysis of catalytic pyrolysis of Baiyinhua coal with pyrolysis time-of-flight mass spectrometry

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, Lijun Jin, Yang Zhou, Heng Li, Yang Li, Haoquan Hu   +5 more
openaire   +1 more source

Off-line thermochemolysis versus flash pyrolysis for the in situ methylation of lignin: Is pyrolysis necessary?

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, Daniel M. Carson, David J. Clifford, Robert D. Minard, Patrick G. Hatcher   +4 more
openaire   +1 more source