97/02025 Heating value of biomass and biomass pyrolysis products

AbstractThis study aims to analyze the products of the catalytic pyrolysis of naturally colored cotton residues, type BRS (seeds from Brazil), called BRS-Verde, BRS-Rubi, BRS-Topázio and BRS-Jade. The energy characterization of biomass was evaluated through ultimate and proximate analysis, higher heating value, cellulose, hemicellulose and lignin content, thermogravimetric analysis and apparent density. Analytical pyrolysis was performed at 500 °C in an analytical pyrolyzer from CDS Analytical connected to a gas chromatograph coupled to the mass spectrometer (GC/MS). The pyrolysis vapors were reformed at 300 and 500 °C through thermal and catalytic cracking with zeolites (ZSM-5 and HZSM-5). It has been noticed that pyrolysis vapor reforming at 500 °C promoted partial deoxygenation and cracking reactions, while the catalytic reforming showed better results for the product deoxygenation. The catalyst reforming of pyrolysis products, especially using HZSM-5 at 500 °C, promoted the formation of monoaromatics such as benzene, toluene, xylene and styrene, which are important precursors of polymers, solvents and biofuels. The main influence on the yields of these aromatic products is due to the catalytic activity of ZSM-5 favored by increased temperature that promotes cracking reactions due expanded zeolites channels.

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Optimization of Chemical Kinetics for Methane and Biomass Pyrolysis Products in Moderate or Intense Low-Oxygen Dilution Combustion

Energy & Fuels ◽

10.1021/acs.energyfuels.8b01022 ◽

2018 ◽

Vol 32 (10) ◽

pp. 10194-10201 ◽

Cited By ~ 7

Author(s):

Magnus Fürst ◽

Pino Sabia ◽

Marco Lubrano Lavadera ◽

Gianmarco Aversano ◽

Mara de Joannon ◽

...

Keyword(s):

Chemical Kinetics ◽

Biomass Pyrolysis ◽

Low Oxygen ◽

Pyrolysis Products

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Batch pyrolysis of cotton stalks for evaluation of biochar energy potential

E3S Web of Conferences ◽

10.1051/e3sconf/201911600001 ◽

2019 ◽

Vol 116 ◽

pp. 00001 ◽

Cited By ~ 1

Author(s):

Rafat Al Afif ◽

S. Sean Anayah ◽

Christoph Pfeifer

Keyword(s):

Pyrolysis Temperature ◽

Product Yield ◽

Energy Yield ◽

Mass Energy ◽

Energy Potential ◽

Pyrolysis Products ◽

Heating Value ◽

Cotton Stalks ◽

Bio Oil ◽

Selection Of

The thermal cracking of cotton stalks (CS) via pyrolysis was performed using a laboratory scale batch pyrolysis reactor. The effects of the final pyrolysis temperature varying from 300 to 800°C on the pyrolysis products distribution has been investigated. The maximum biochar yield of 46.5% was obtained at 400°C. As the pyrolysis process temperature increased, the solid char product yield decreased. The lowest biochar yield of 28% was obtained at 800°C. The largest higher heating value (HHV, 25.845 MJ kg-1) was obtained at 600°C. All biochar samples produced between 500 and 700°C had an energy densification ratio of 1.41, indicating a higher mass-energy density than the initial feedstock. A larger share of syngas and bio-oil were produced at higher temperatures, as estimated. Preferential selection of a char based on the energy yield would lead to a selection of the 400°C product, while selection based on the energy densification ratio would be for a product obtained between 500 to 700°C.

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Study on the Mechanism of Gas Component Release for Biomass Pyrolysis

E3S Web of Conferences ◽

10.1051/e3sconf/201911803058 ◽

2019 ◽

Vol 118 ◽

pp. 03058

Author(s):

Hongtao Li ◽

Li Wang ◽

Yunguang Ji ◽

Shuqi Xue ◽

Zhenhui Wang

Keyword(s):

Biomass Energy ◽

Energy Utilization ◽

Thermochemical Conversion ◽

Release Mechanism ◽

Correction Coefficient ◽

Superposition Method ◽

Biomass Pyrolysis ◽

Yield Model ◽

Pyrolysis Gas ◽

Pyrolysis Products

Biomass energy utilization can solve the contradiction between economic development and energy and environment. Biomass pyrolysis technology is not only one of the thermochemical conversion technologies, but also the necessary stage of biomass gasification, which has become a hot academic research topic. Firstly, based on the pyrolysis experimental data of cellulose, hemicellulose and lignin, the analytical expressions of pyrolysis gas mass yields of different biomass components varying with temperature were obtained; then, the prediction of pyrolysis products was obtained by mass component superposition method, and the correction coefficient of biomass pyrolysis gas yield model was obtained based on the comparison between the average yield of biomass pyrolysis gas and the predicted value of pyrolysis products; finally, the gas release mechanism model of biomass pyrolysis was obtained. This study provides theoretical basis and technical support for the development of biomass utilization technology.

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Experimental Study on Catalytic Pyrolysis of Biomass Pellet

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.291-294.320 ◽

2013 ◽

Vol 291-294 ◽

pp. 320-323 ◽

Cited By ~ 1

Author(s):

Ai Jun Xue ◽

Ji Hong Pan ◽

Mao Cheng Tian

Keyword(s):

Catalytic Pyrolysis ◽

Test Bench ◽

Biomass Gasification ◽

Biomass Pyrolysis ◽

Corn Straw ◽

Pyrolysis Products ◽

Volume Percentage ◽

Pyrolysis Characteristics ◽

Pyrolysis Of Biomass ◽

Biomass Pellet

In the present study, catalytic pyrolysis characteristics of corn straw pellet were studied in biomass pyrolysis test bench. The effect of content of CaO added in biomass pellet on pyrolysis products was investigated. The results showed that: with the increase of CaO content, the yield of tar decreased ,and the yield of char and gas increased. Among gas compositions, the volume percentage of CO、H2、CH4 increased, while the volume percentage of CO2 decrease greatly. The Calorific values of the gas increase distinctly. The results have significant theoretical guidance on the application of biomass pellets in biomass gasification equipments.

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Pachira aquatica fruits shells valorization: renewables phenolics through analytical pyrolysis study (Py-GC/MS)

Ciência Rural ◽

10.1590/0103-8478cr20210068 ◽

2022 ◽

Vol 52 (2) ◽

Author(s):

Luiz Augusto da Silva Correia ◽

Janduir Egito da Silva ◽

Guilherme Quintela Calixto ◽

Dulce Maria de Araújo Melo ◽

Renata Martins Braga

Keyword(s):

Bulk Density ◽

Lignin Content ◽

Infrared Region ◽

Volatile Matter ◽

Pyrolysis Products ◽

Flash Pyrolysis ◽

Heating Value ◽

Energetic Characterization ◽

Forest Waste ◽

Phenolic Extract

ABSTRACT: This research valorized Pachira aquatica Aubl.’s fruit shells (PAS) through its energetic characterization and flash pyrolysis for biofuels or chemicals production. The characterization was performed through proximate and ultimate analysis, bulk density, higher heating value (HHV), hemicellulose, cellulose and lignin content, thermogravimetric analysis and absorption spectra in the infrared region obtained by Fourier-transform infrared spectroscopy technique (FTIR). The analytical flash pyrolysis was performed at 500°C in a Py-5200 HP-R coupled to a gas chromatograph (Py-GC/MS). The PAS biomass presents potential for thermochemical energy conversion processes due to its low moisture and ash content, 76.90% of volatile matter, bulk density of 252.6 kg/m3 and HHV of 16.24 MJ/kg. Flash pyrolysis products are mostly phenols or light organic acids derived from the decomposition of polysaccharides. Results confirmed the potential of PAS to produce bio-phenolics, such as 4-methoxyphenol which is an important active ingredient for skin depigmentation used in drugs and cosmetics, and as phenolic extract that can be used as a precursor to resins, applications that convert this forest waste into bio products for industry into a green circular economy.

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