Low-temperature pyrolysis. II. An isotope study of the pyrolysis of the hydrogen phthalate ester of trans-1,2-dimethylcyclohexanol

1967 ◽  
Vol 45 (7) ◽  
pp. 679-681
Author(s):  
K. G. Rutherford ◽  
R. M. Ottenbrite
Keyword(s):  
Thermal Decomposition ◽  
Low Temperature ◽  
Phthalic Anhydride ◽  
Ion Pair ◽  
Phthalate Ester ◽  
Hydrogen Phthalate ◽  
Isotope Study ◽  
Sterically Hindered ◽  
Low Temperature Pyrolysis

The hydrogen phthalate ester of trans-l,2-dimethylcyclohexanol was prepared by using phthalic anhydride enriched in 18O. The ester was partially decomposed at 128°. An observed enrichment of 18O in the alcohol portion of the undecomposed ester supports an earlier postulate that an ion pair is involved in the thermal decomposition of this sterically hindered ester.

Cavitation-induced Reactions in Pure Substituted Benzenes

1972 ◽  
Vol 50 (11) ◽  
pp. 1743-1750 ◽  
Author(s):  
G. K. Diedrich ◽  
P. Kruus ◽  
L. M. Rachlis
Keyword(s):  
Thermal Decomposition ◽  
Low Temperature ◽  
Bond Dissociation Energy ◽  
Dissociation Energy ◽  
Cavitation Bubble ◽  
Reaction Rate ◽  
Substituted Benzenes ◽  
Thermal Reactions ◽  
Initiation Reaction ◽  
Low Temperature Pyrolysis

The formation of polymers has been observed on exposure of pure substituted benzenes to ultrasound intense enough to cause cavitation. The products have some of the characteristics of the char obtained from low temperature pyrolysis of hydrocarbons. They are difficult to dissolve, melt above 300 °C, and give a large broad e.p.r. signal. A crude correlation between bond dissociation energy and the reaction rate suggests that the initiation reaction is a thermal decomposition in a cavitation bubble. The phenomenon is compared to radiolysis and thermal reactions.

LOW-TEMPERATURE PYROLYSIS: I. THE PYROLYSIS OF HYDROGEN PHTHALATE ESTERS OF SOME TERTIARY ALCOHOLS

1964 ◽  
Vol 42 (12) ◽  
pp. 2657-2664 ◽  
Author(s):  
K. G. Rutherford ◽  
D. P. C. Fung
Keyword(s):  
Liquid Phase ◽  
Low Temperature ◽  
Phthalic Acid ◽  
Phthalate Esters ◽  
Ionic Character ◽  
Hydrogen Phthalate ◽  
Tertiary Alcohols ◽  
Hydrogen Phthalate Esters ◽  
Low Temperature Pyrolysis

Some hydrogen phthalate esters of tertiary alcohols have been subjected to liquid phase pyrolysis. Olefinic mixtures and phthalic acid are the only products of the reaction. A study of the olefin distribution for each of the compounds pyrolyzed was made. Evidence of ionic character in liquid phase pyrolysis is presented.

Kinetic study of the thermal decomposition of 1,1-diphenylpropyl hydrogen phthalate ester in solution

1973 ◽  
Vol 38 (6) ◽  
pp. 1186-1190 ◽  
Author(s):  
Raphael M. Ottenbrite ◽  
James W. Brockington ◽  
Kenneth G. Rutherford
Keyword(s):  
Thermal Decomposition ◽  
Kinetic Study ◽  
Phthalate Ester ◽  
Hydrogen Phthalate

Chemical yields from low-temperature pyrolysis of CCA-treated wood

2009 ◽  
Author(s):  
Qirong Fu ◽  
Dimitris Argyropolous ◽  
Lucian Lucia ◽  
David Tilotta ◽  
Stan Lebow
Keyword(s):  
Low Temperature ◽  
Treated Wood ◽  
Low Temperature Pyrolysis

Preparation of Organic/Inorganic Membrane by PDMS Low-temperature Pyrolysis

2014 ◽  
Vol 29 (2) ◽  
pp. 137-142
Author(s):  
Jiao-Zhu YU ◽  
Lin LI ◽  
Xin JIN ◽  
Ling-Hua DING ◽  
Tong-Hua WANG
Keyword(s):  
Low Temperature ◽  
Inorganic Membrane ◽  
Low Temperature Pyrolysis

scholarly journals High- and low-temperature pyrolysis profiles describe volatile organic compound emissions from western US wildfire fuels

2018 ◽  
Author(s):  
Kanako Sekimoto ◽  
Abigail R. Koss ◽  
Jessica B. Gilman ◽  
Vanessa Selimovic ◽  
Matthew M. Coggon ◽  
...  
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Biomass Burning ◽  
Ponderosa Pine ◽  
Fine Particles ◽  
Voc Emissions ◽  
Western Us ◽  
Volatile Organic ◽  
Low Temperature Pyrolysis ◽  
Pyrolysis Processes

Abstract. Biomass burning is a large source of volatile organic compounds (VOCs) and many other trace species to the atmosphere, which can act as precursors to the formation of secondary pollutants such as ozone and fine particles. Measurements collected with a proton-transfer-reaction time-of-flight mass spectrometer during the FIREX 2016 laboratory intensive were analyzed with Positive Matrix Factorization (PMF), in order to understand the instantaneous variability in VOC emissions from biomass burning, and to simplify the description of these types of emissions. Despite the complexity and variability of emissions, we found that a solution including just two emission profiles, which are mass spectral representations of the relative abundances of emitted VOCs, explained on average 85 % of the VOC emissions across various fuels representative of the western US (including various coniferous and chaparral fuels). In addition, the profiles were remarkably similar across almost all of the fuel types tested. For example, the correlation coefficient r of each profile between Ponderosa pine (coniferous tree) and Manzanita (chaparral) is higher than 0.9. We identified the two VOC profiles as resulting from high-temperature and low-temperature pyrolysis processes known to form VOCs in biomass burning. High-temperature and low-temperature pyrolysis processes do not correspond exactly to the commonly used flaming and smoldering categories as described by modified combustion efficiency (MCE). The average atmospheric properties (e.g. OH reactivity, volatility, etc.) of the high- and low-temperature profiles are significantly different. We also found that the two VOC profiles can describe previously reported VOC data for laboratory and field burns. This indicates that the high- and low-temperature pyrolysis profiles could be widely useful to model VOC emissions from many types of biomass burning in the western US, with a few exceptions such as burns of duff and rotten wood.

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