Two Studies in Gas-Phase Ion Spectroscopy

Simpson, Matthew; Tuckett, Richard P.

doi:10.1007/978-3-642-23129-2

Cited by 5 publications

(1 citation statement)

References 16 publications

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“…Enthalpies of formation of molecular products are taken from thermodynamic table present in [12], so 2 is the only unknown of equation (15). With Cantera, computation to deduce the value of 2 is performed for all (16), and ( 8) cases, at different values of ɸ.…”

Section: Brief On Cantera Modelsmentioning

confidence: 99%

Combustion Flame Temperature Considering Fuel and Air Species and Optimization Process

Ndizihiwe¹,

Mkandawire²,

Venant³

2021

Adv. sci. technol. eng. syst. j.

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Estimation of optimal Air or oxygen is important for the combustion process to be efficient and produce more energy. This is to be based on each component of the fuel and the air, considering their respective pressure and density. At first, this research investigates the role of 2 , 2 , 2 present in combination with 4 , and the air on the flame temperature; using simulation with Cantera 2.4. Results have been compared and calibrated with field data from KivuWatt company. It then demonstrates the way to achieve optimum Air Fuel Ratio (AFR) for the various species of the fuel. The results estimated the flame temperature by means of the percentages of all species of the fuel and the air, as well as various conditions of pressure and temperature. Finally, it combines all to show different values of optimum AFR at various species percentages; and uses a python program to create an AFR calculator available online through the link provided.

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Section: Brief On Cantera Modelsmentioning

confidence: 99%

Combustion Flame Temperature Considering Fuel and Air Species and Optimization Process

Ndizihiwe¹,

Mkandawire²,

Venant³

2021

Adv. sci. technol. eng. syst. j.

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Thermal Degradation of p‐Hydroxybenzoic Acid in Macadamia Nut Oil, Olive Oil, and Corn Oil

Castada

Zhao-yu

Barringer

et al. 2020

J Americ Oil Chem Soc

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p‐Hydroxybenzoic acid (PHBA) plays a significant role in sustaining the oxidative stability of macadamia nut oil (MNO). However, PHBA undergoes thermal decarboxylation and loses its bioactive antioxidant properties. In this study, we determine PHBA degradation kinetics in oils at various heating temperatures, which provides fundamental understanding of PHBA thermal degradation in oils and oil quality changes during high‐temperature processing. PHBA degradation kinetics in MNO, olive oil, and corn oil were evaluated at temperatures typical for cooking and frying. PBHA headspace concentration was measured using selected ion flow tube mass spectrometry. PHBA decarboxylation followed a zero‐order reaction, where degradation could be affected by factors such as the type of oil matrix having different FA compositions, antioxidants, and component interactions. PHBA degradation activation energies (E a) showed that PHBA was more stable against thermal decarboxylation in MNO (85 kJ mol–1) than in olive oil (40 kJ mol−1) or corn oil (22 kJ mol−1). The higher enthalpy (ΔH≠θ) of decarboxylation in MNO (82 kJ mol−1) indicates that PHBA is more inhibited from decomposition than olive oil (37 kJ mol−1) or corn oil (19 kJ mol−1). Moreover, the negative entropy values (ΔS≠θ) of PHBA degradation from MNO (−192 J mol−1 K−1), olive oil (−277 J mol−1 K−1), and corn oil (−325 J mol−1 K−1) indicates that these oils impart some inhibitory properties against PHBA thermal decarboxylation.

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Gas‐phase chemical ionization of 4‐alkyl branched‐chain carboxylic acids and 3‐methylindole using H₃O⁺, NO⁺, and O₂⁺ ions

Castada

Barringer

Wick

2017

Rapid Comm Mass Spectrometry

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Two Studies in Gas-Phase Ion Spectroscopy

Cited by 5 publications

References 16 publications

Combustion Flame Temperature Considering Fuel and Air Species and Optimization Process

Combustion Flame Temperature Considering Fuel and Air Species and Optimization Process

Thermal Degradation of p‐Hydroxybenzoic Acid in Macadamia Nut Oil, Olive Oil, and Corn Oil

Gas‐phase chemical ionization of 4‐alkyl branched‐chain carboxylic acids and 3‐methylindole using H₃O⁺, NO⁺, and O₂⁺ ions

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Two Studies in Gas-Phase Ion Spectroscopy

Cited by 5 publications

References 16 publications

Combustion Flame Temperature Considering Fuel and Air Species and Optimization Process

Combustion Flame Temperature Considering Fuel and Air Species and Optimization Process

Thermal Degradation of p‐Hydroxybenzoic Acid in Macadamia Nut Oil, Olive Oil, and Corn Oil

Gas‐phase chemical ionization of 4‐alkyl branched‐chain carboxylic acids and 3‐methylindole using H3O+, NO+, and O2+ ions

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Product

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Gas‐phase chemical ionization of 4‐alkyl branched‐chain carboxylic acids and 3‐methylindole using H₃O⁺, NO⁺, and O₂⁺ ions