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You searched for: Subject chemical reactions Remove constraint Subject: chemical reactions Subject term catalysts Remove constraint Subject term: catalysts Subject term heat production Remove constraint Subject term: heat production Text availability Citation in PubAg Remove constraint Text availability: Citation in PubAg
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1. H-bond catalytic mechanism of aromatic electrophilic substitution between phenol and formaldehyde

Author:
Jie Zhang; Tong Zhao; Ju Xie; Zedong He; William W. Yu
Source:
Tetrahedron 2020 v.76 no.13 pp. 131055
ISSN:
0040-4020
Subject:
Lewis acids; catalysts; catalytic activity; chemical reactions; chemical structure; coatings; formaldehyde; heat production; hydrogen bonding; oxalates; phenol; phenolic resins; plastics; quantum mechanics; reaction mechanisms
Abstract:
... Phenolic resins are widely used as moulding plastics, coatings, industrial bondings and ablative materials. An essential reaction step for preparing phenolic resins is aromatic electrophilic substitution. However, the current understanding of this reaction mechanism is kind of too general, making them not able to explain some phenomena such as highly exothermic characteristic of the early reaction ...
DOI:
10.1016/j.tet.2020.131055

2. Desktop NMR spectroscopy for real-time monitoring of an acetalization reaction in comparison with gas chromatography and NMR at 9.4 T

Author:
Kawarpal Singh; Ernesto Danieli; Bernhard Blümich
Source:
Analytical and bioanalytical chemistry 2017 v.409 no.30 pp. 7223-7234
ISSN:
1618-2642
Subject:
activation energy; agitation; aldehydes; catalysts; catalytic activity; chemical reactions; ethylene glycol; fume hoods; gas chromatography; heat production; infrared spectroscopy; kinetics; magnetic materials; mass spectrometry; monitoring; nuclear magnetic resonance spectroscopy; process control; reaction kinetics; spectrometers; temperature; working conditions
Abstract:
... Monitoring of chemical reactions in real-time is in demand for process control. Different methods such as gas chromatography (GC), mass spectroscopy, infrared spectroscopy, and nuclear magnetic resonance (NMR) are used for that purpose. The current state-of-the-art compact NMR systems provide a useful method to employ with various reaction conditions for studying chemical reactions inside the fume ...
DOI:
10.1007/s00216-017-0686-y

3. Mathematical Modeling and Numerical Simulation of a Fischer–Tropsch Packed Bed Reactor and Its Thermal Management for Liquid Hydrocarbon Fuel Production using Biomass Syngas

Author:
Lee Tae Seok; Chung J. N.
Source:
Energy & Fuels 2012 v.26 no.2 pp. 1363-1379
ISSN:
1520-5029
Subject:
biomass; carbon; catalysts; chemical reactions; fuel production; gasification; heat production; hydrocarbons; mass transfer; mathematical models; pellets; porous media; prediction; reaction kinetics; synthesis gas; synthetic fuels; temperature profiles; water vapor
Abstract:
... A mathematical modeling and numerical simulation study has been carried out for a liquid hydrocarbon production system using syngas from biomass gasification. The system is based on a Fischer–Tropsch packed bed reactor with an external heat removal sink. To ensure the accurate prediction of exothermic heat release, the chemical reaction kinetics is modeled with a comprehensive product distribution ...
DOI:
10.1021/ef201667a

4. Susceptibility of a heterogeneous catalyst, Rh/γ-alumina, to rapid structural change by exposure to NO

Author:
Tom Campbell; Andrew J. Dent; Sofia Diaz-Moreno; John Evans; Steven G. Fiddy; Mark A. Newton; Sandra Turin
Source:
Chemical communications 2002 v. no.4 pp. 304-305
ISSN:
1364-548X
Subject:
aluminum oxide; catalysts; chemical reactions; heat production; nitric oxide; particle size; rhodium
Abstract:
... Metal particles in a Rh/γ-Al₂O₃ catalyst of differing particle size are oxidised by NO/He within 5 seconds at 313 K; rapid, highly exothermic dissociative chemisorption of NO is the initial step. ...
DOI:
10.1039/b106846f