Prospecting pecan nutshell pyrolysis as a source of bioenergy and bio-based chemicals using multicomponent kinetic modeling, thermodynamic parameters estimation, and Py-GC/MS analysis

Mumbach, Guilherme Davi; Alves, José Luiz Francisco; Silva, Jean Constantino Gomes da; Domenico, Michele Di; Arias, Santiago; Pacheco, José Geraldo A.; Marangoni, Cintia; Machado, Ricardo Antônio Francisco; Bolzan, Ariovaldo

doi:10.1016/j.rser.2021.111753

Cited by 64 publications

(13 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Pyrolysis–gas chromatography/mass spectrometry (Py-GC/MS) analyses can provide a fingerprint of the spectral characteristic of the volatile products obtained from the degradation of the EP/20G3 sample, which is helpful to understand its gas-phase flame-retardant mechanism. , The total ion chromatogram for the pyrolysis process of EP/20G3 is shown in Figure S3, and the supposed pyrolysis fragments determined by MS are presented in Table . As presented in Table , the identified compounds can be classified as pyridines, phenols, ketones, ethers, amides, and others.…”

Section: Results and Discussionmentioning

confidence: 99%

Poly(amidoamine) Dendrimers: An Excellent Intrinsic Flame Retardant and Curing Agent for Epoxy Resins

Yang

et al. 2023

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

Considerable efforts have been made to fabricate the intrinsic epoxy resin (EP) with excellent flame retardancy and mechanical properties. However, conventional single molecule flame retardants have met the bottleneck after the massive research studies of the past decade, and with the development of the polymer technology, dendritic flame retardants have been studied due to their versatility and more efficient flame retardancy. Herein, poly-amidoamine (PAMAM) dendrimer flame retardants of different generations were synthesized and utilized as a curing agent and a flame retardant to fabricate the intrinsic EP materials. Their impacts on integrated properties of an EP matrix were studied thoroughly. As expected, the thermal stability, the fire safety, and the flexural capacity of EP/PAMAM thermosets were highly strengthened. The results showed that with 20 wt % loading content of the third-generation PAMAM(G3) dendrimer in the EP matrix (named as EP/20G3), its limited oxygen index value reached up to 26.4% and passed the UL-94 V-0 level. The peak heat release rate and the total heat release data decreased by 51.1 and 60.3%, respectively. Furthermore, the values of T g , flexural strength, and flexural modulus of EP/20G3 were also promoted comparing with that of the pure EP. At the same time, as an amino-abundant compound, PAMAM dendrimers with different generations can also be served as a curing agent for EP instead of the commonly used diethylenetriamine. It means that PAMAM dendrimers play a dual role in the preparation of flame retardant EP in this system.

show abstract

Section: Results and Discussionmentioning

confidence: 99%

Poly(amidoamine) Dendrimers: An Excellent Intrinsic Flame Retardant and Curing Agent for Epoxy Resins

Yang

et al. 2023

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

show abstract

“…Besides the detailed analysis of the reaction products, another important aspect is the development of kinetic models to obtain activation energy parameters and pre-exponential factors, aimed at the reactor design for scaling-up to an industrial process [31,32]. Thermogravimetric analysis (TGA) has been used to study the chemical kinetics involved in biomass pyrolysis process [33].…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis of Energy Cane Bagasse: Investigating Kinetics, Thermodynamics, and Effect of Temperature on Volatile Products

Liborio,

Gonzalez,

Arias

et al. 2023

Energies

Self Cite

View full text Add to dashboard Cite

Energy cane is a genotype derived from species of sugarcane (Saccharum officinarum and Saccharum spontaneum) with a lower sucrose content and higher fiber content for bioenergy purposes. It is a rustic plant that demands less fertile soils that do not compete with food crops. In this work, an analysis of energy cane bagasse pyrolysis products was performed, assessing the effect of reaction temperature and kinetic and thermodynamic parameters. Anhydrosugars, such as D-allose, were the primary compounds derived from the decomposition of energy cane at 500 °C. Methyl vinyl ketone and acetic acid were favored at 550 and 600 °C. At 650 °C, methyl glyoxal, acetaldehyde and hydrocarbons were favored. Among the hydrocarbons observed, butane, toluene and olefins such as 1-decene, 1-undecene, 1-tridecene and 1-tetradecene were the most produced. The Friedman isoconversional method was able to determine the average activation energies in the ranges 113.7−149.4, 119.9−168.0, 149.3−196.4 and 170.1−2913.9 kJ mol−1 for the decomposition of, respectively, pseudo-extractives, pseudo-hemicellulose, pseudo-cellulose and pseudo-lignin. The thermodynamic parameters of activation were determined within the ranges of 131.0 to 507.6 kJ mol−1 for ΔH, 153.7 to 215.2 kJ mol−1 for ΔG and −35.5 to 508.8 J mol−1 K−1 for ΔS. This study is very encouraging for the cultivation and use of high-fiber-content energy cane bagasse, after sucrose extraction, to produce biofuels as an alternative to the current method of conversion into electricity by low-efficiency burning.

show abstract

“…Several studies were conducted to estimate the pyrolysis kinetics of agricultural wastes such as Palm oil waste [22], bagasse [23] rice straw [24], pecan shell [25], rice husk [26], pearl millet [27], aloe vera [28], Bengalese [29], pigeon pea [30], hazelnut husk [31], coconut shell [32], and garlic stalks [33]. Li et al (2021) studied pyrolysis of sesame residue at different temperatures (350 °C-650 °C) [34].…”

Section: Introductionmentioning

confidence: 99%

Understanding the pyrolysis kinetics, thermodynamic, and environmental sustainability parameters of Sesamum indicum crop residue

Sivaraman,

Shanmugam,

Veerapandian

et al. 2023

Environ. Res. Commun.

View full text Add to dashboard Cite

In this work, the physiochemical characteristics, thermodynamics, and sustainability of the pyrolysis of Sesamum indicum biomass were assessed. The pyrolysis kinetics of sesame agro-residues performed using isoconversional techniques such as Kissinger, KAS, and OFW methods showed activation energies of 192, 120, and 123 kJ mol−1, respectively. The impact of the pyrolysis temperature (550, 650, 750 °C) on the generation of biochar, bio-oil, and gas is also studied; the exergy efficiency increased from 82.7 at 550 °C to 87.3% at 750 °C with an increase in the temperature. Sesame biochar’s Van Krevalan diagram showed how its fuel-like characteristics also grew with rising temperatures. The input and output parameters showed a high agreement in the mass, energy, and exergy balance closures. However, it was shown that the overall energy efficiency was greater at 750 °C (71.2%) compared to 55.5% and 69.8% at 550 °C and 650 °C, respectively. Sustainability analysis showed that lower temperatures had a smaller impact on the environment.

show abstract

Prospecting pecan nutshell pyrolysis as a source of bioenergy and bio-based chemicals using multicomponent kinetic modeling, thermodynamic parameters estimation, and Py-GC/MS analysis

Cited by 64 publications

References 67 publications

Poly(amidoamine) Dendrimers: An Excellent Intrinsic Flame Retardant and Curing Agent for Epoxy Resins

Poly(amidoamine) Dendrimers: An Excellent Intrinsic Flame Retardant and Curing Agent for Epoxy Resins

Pyrolysis of Energy Cane Bagasse: Investigating Kinetics, Thermodynamics, and Effect of Temperature on Volatile Products

Understanding the pyrolysis kinetics, thermodynamic, and environmental sustainability parameters of Sesamum indicum crop residue

Contact Info

Product

Resources

About