Study on pyrolysis characteristics of red pepper stalks to analyze the changes of pyrolytic behaviors from xylophyta to herbage

Wang, Tipeng; Zhang, Runhe; Su, Wenjing; Lü, Qiang; Chen, Dong

doi:10.1016/j.jaap.2016.05.020

Cited by 14 publications

(4 citation statements)

References 17 publications

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“…Studies carried out in pepper agricultural byproducts, such as stalks, have shown that the composition of these raw materials encompasses a major presence of holocellulose (63.4%), cellulose (43-2%), lignin (24.7%), and hemicelluloses (15.8%). 46,47 Such a polymeric wall represents a bottleneck for valorizing the flavonoids in these resilient tissues.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Thus, the acidity, viscosity, and overall ionicity of the NaDESs play roles in deconstructing the lignocellulosic matrixes in pepper stalks and extracting the glycosylated flavonoids. Studies carried out in pepper agricultural byproducts, such as stalks, have shown that the composition of these raw materials encompasses a major presence of holocellulose (63.4%), cellulose (43-2%), lignin (24.7%), and hemicelluloses (15.8%). , Such a polymeric wall represents a bottleneck for valorizing the flavonoids in these resilient tissues.…”

Section: Resultsmentioning

confidence: 99%

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Optimized Extraction of Glycosylated Flavonoids from Pepper (Capsicum annuum L.) Agricultural Biomass Residues through Ultrasonic Pulse-Assisted Natural Deep Eutectic Solvents

Jiménez-Ortega,

Bastidas-Bastidas,

Angulo-Escalante

et al. 2023

ACS Sustainable Resour. Manage.

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To address the grand challenges of valorizing agricultural biomass (AB) residues, processes such as the extraction of phytochemicals need to align with the principles of green chemistry and sustainability. In this regard, Natural Deep Eutectic Solvents (NaDESs) are being utilized to extract value-added compounds from AB, thanks to their biodegradability, costeffectiveness, and low toxicity. The objective of this research was to valorize bell pepper AB residues (stalks and leaves) through the extraction of glycosylated flavonoids with antioxidant activity. To achieve this, 24 NaDESs were designed based on choline chloride (ChCl) and various hydrogen bond donors, including carboxylic acids and alcohols. The NaDESs extraction capacities for total flavonoids and two model flavonoids, quercitrin (quercetin 3-Orhamnoside) (Q3O-R) and cynaroside (luteolin 7-O-glucoside) (L7O-G), were systematically evaluated. Two crucial extraction parameters, time (measured in seconds) and ultrasonic amplitude (measured in Watts), were optimized using a central composite rotatable design (CCRD). The high content of bioactive flavonoids present in pepper AB residues was demonstrated by using ChCl/ 1,6-hexanediol in a 1:1 molar ratio with 30 wt % water (10.31 ± 0.16 mg quercetin equivalent/g dry AB). The ultrasonic pulseassisted NaDES extraction method outperformed the results obtained with conventional hydroethanolic extraction. Therefore, NaDESs represent an efficient and greener alternative to conventional organic solvents for extracting value-added compounds, such as natural antioxidants, from resilient lignocellulosic AB residues.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Optimized Extraction of Glycosylated Flavonoids from Pepper (Capsicum annuum L.) Agricultural Biomass Residues through Ultrasonic Pulse-Assisted Natural Deep Eutectic Solvents

Jiménez-Ortega,

Bastidas-Bastidas,

Angulo-Escalante

et al. 2023

ACS Sustainable Resour. Manage.

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“…Solanaceae vegetable crops, especially sweet pepper and tomato, produces significant amount of crop residues, which is not directly used as feed, due to their low digestibility [1,2]. Therefore, most of them are left to decay in the fields or are burnt [3].…”

Section: Introductionmentioning

confidence: 99%

Genomic, Transcriptomic and Enzymatic Insight into Lignocellulolytic System of a Plant Pathogen Dickeya sp. WS52 to Digest Sweet Pepper and Tomato Stalk

et al. 2019

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Dickeya sp., a plant pathogen, causing soft rot with strong pectin degradation capacity was taken for the comprehensive analysis of its corresponding biomass degradative system, which has not been analyzed yet. Whole genome sequence analysis of the isolated soft-rotten plant pathogen Dickeya sp. WS52, revealed various coding genes which involved in vegetable stalk degradation-related properties. A total of 122 genes were found to be encoded for putative carbohydrate-active enzymes (CAZy) in Dickeya sp. WS52. The number of pectin degradation-related genes, was higher than that of cellulolytic bacteria as well as other Dickeya spp. strains. The CAZy in Dickeya sp.WS52 contains a complete repertoire of enzymes required for hemicellulose degradation, especially pectinases. In addition, WS52 strain possessed plenty of genes encoding potential ligninolytic relevant enzymes, such as multicopper oxidase, catalase/hydroperoxidase, glutathione S-transferase, and quinone oxidoreductase. Transcriptome analysis revealed that parts of genes encoding lignocellulolytic enzymes were significantly upregulated in the presence of minimal salt medium with vegetable stalks. However, most of the genes were related to lignocellulolytic enzymes, especially pectate lyases and were downregulated due to the slow growth and downregulated secretion systems. The assay of lignocellulolytic enzymes including CMCase and pectinase activities were identified to be more active in vegetable stalk relative to MSM + glucose. However, compared with nutrient LB medium, it needed sufficient nutrient to promote growth and to improve the secretion system. Further identification of enzyme activities of Dickeya sp.WS52 by HPLC confirmed that monosaccharides were produced during degradation of tomato stalk. This identified degradative system is valuable for the application in the lignocellulosic bioenergy industry and animal production.

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“…And the fixed carbon and ash in biomass were remained in the form of solid residue which can be further used as a compost or soil amendment . In addition, pyrolysis is the first step to combustion and gasification . Thus, the study on kinetic characteristics of cattle manure pyrolysis is greatly important for developing thermochemical processing system.…”

Section: Introductionmentioning

confidence: 99%

Kinetic analysis of cattle manure pyrolysis process with a novel two‐step method: Pseudo‐component model coupled with multipeak gaussian fitting

Xin

Cao

Yuan

et al. 2017

Env Prog and Sustain Energy

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A novel two‐step method is proposed to conduct the pseudo‐component model for cattle manure pyrolysis process. The weight coefficient of pseudo‐components firstly are identified accurately by Gaussian multipeak fitting method based on the DTG data of cattle manure, and then the kinetic parameters for each pseudo‐component including reaction order, activation energies (Ei) and pre‐exponential factor (Ai), are obtained by the reaction‐order mechanism function and Coats‐Redfern method. The results showed that the decomposition process of cattle manure should be characterized by five pseudo‐components (extractives, hemicellulose, cellulose, lignin, and volatilizable carbonaceous materials). The corresponding reaction orders were 1.6, 1.8, 1.9, 1.3, and 1.8, respectively. The Ei were ranged from 42.54 to 527.02 kJ mol−1 for five pseudo‐components. The pseudo‐component model coupled with multipeak Gaussian fitting could describe the kinetic process of cattle manure decomposition very well, and provide useful data for the design of a thermal decomposition processing system and the kinetic analysis of pyrolysis process of other solid wastes. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 1618–1625, 2018

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Study on pyrolysis characteristics of red pepper stalks to analyze the changes of pyrolytic behaviors from xylophyta to herbage

Cited by 14 publications

References 17 publications

Optimized Extraction of Glycosylated Flavonoids from Pepper (Capsicum annuum L.) Agricultural Biomass Residues through Ultrasonic Pulse-Assisted Natural Deep Eutectic Solvents

Optimized Extraction of Glycosylated Flavonoids from Pepper (Capsicum annuum L.) Agricultural Biomass Residues through Ultrasonic Pulse-Assisted Natural Deep Eutectic Solvents

Genomic, Transcriptomic and Enzymatic Insight into Lignocellulolytic System of a Plant Pathogen Dickeya sp. WS52 to Digest Sweet Pepper and Tomato Stalk

Kinetic analysis of cattle manure pyrolysis process with a novel two‐step method: Pseudo‐component model coupled with multipeak gaussian fitting

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