Journal ArticleDOI
Pyrolysis of wheat straw in a thermogravimetric analyzer: Effect of particle size and heating rate on devolatilization and estimation of global kinetics
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In this paper, the influence of different parameters such as particle size, initial weight of the sample, and heating rate on the devolatilization of wheat straw particles have been studied using thermogravimetric analysis.Abstract:
The influence of different parameters such as particle size, initial weight of the sample, and heating rate on the devolatilization of wheat straw particles have been studied using thermogravimetric analysis. In addition, the variations in proximate analysis with different particle sizes of wheat straw have also been investigated. Results show that the curves corresponding to the third stage of pyrolysis differ for variations in particle size, initial weight, and heating rate of the pyrolysis process. A devolatilization model with three parallel nth-order reactions has been considered to determine the global kinetic parameters using thermogravimetric data. The kinetic parameters such as activation energy (kJ/mol), frequency factor (1/min), and order of the reaction for the three stages considered in devolatilization model were E1 = 69, E2 = 78, E3 = 80; k01 = 2.57 × 1012, k02 = 3.97 × 107, k03 = 3.17 × 106; and n1 = 2.3, n2 = 0.65, n3 = 2.7, respectively. It was noted from the order of the reaction that the second stage of the pyrolysis curve corresponds to the degradation of cellulose and hemicellulose, and the third stage to the lignin degradation.read more
Citations
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Journal ArticleDOI
Effect of process parameters on production of biochar from biomass waste through pyrolysis: A review
TL;DR: In this paper, the effect of pyrolysis process parameters on the production of biochar through biochar of biomass is discussed and a comparison between the existing techniques is established in the present work.
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Recent progress on catalytic pyrolysis of lignocellulosic biomass to high-grade bio-oil and bio-chemicals
G. Kabir,G. Kabir,B.H. Hameed +2 more
TL;DR: In this paper, a review of catalytic pyrolysis of lignocellulose biomass to renewable fuel grade bio-oil and chemicals is presented, along with catalysts type and their catalytic activities in the production of renewable biooil and bio-chemicals.
Journal ArticleDOI
Effects of cellulose, hemicellulose and lignin on thermochemical conversion characteristics of the selected biomass.
Vamsee Pasangulapati,Karthikeyan D. Ramachandriya,Ajay Kumar,Mark R. Wilkins,Carol L. Jones,Raymond L. Huhnke +5 more
TL;DR: No significant difference was observed in the weight loss profiles of switchgrass, wheat straw and eastern redcedar even though their cellulose, hemicellulose and lignin contents were considerably different, but biomass composition did significantly affect gas evolution profiles.
Journal ArticleDOI
Pyrolysis, combustion and gasification characteristics of Nannochloropsis gaditana microalgae.
TL;DR: In pyrolysis and combustion processes, most of the gas products were generated at the second degradation step, indicating that oxidation reactions, water gas and water gas shift reactions, were predominant.
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Kinetic study of lignocellulosic biomass oxidative pyrolysis
TL;DR: In this article, a study has been carried out in thermobalance with different oxygen concentrations (5, 10 and 20 vol.%) in the inlet gas stream in order to analyze the effect of oxygen on the lignocellulosic biomass pyrolysis process and establish a kinetic model for oxidized biomass.
References
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Journal ArticleDOI
Effects of temperature and particle size on bio-char yield from pyrolysis of agricultural residues
TL;DR: In this article, slow pyrolysis of agricultural residues such as olive husk, corncob and tea waste at high temperature (950-1250 K) in a cylindrical reactor batch reactor was investigated.
Journal ArticleDOI
Biomass to hydrogen via fast pyrolysis and catalytic steam reforming of the pyrolysis oil or its fractions
TL;DR: In this article, a regionalized system of hydrogen production is proposed, where small and medium-sized pyrolysis units provide bio-oil to a central reforming unit to be catalytically converted to H2 and CO2.
Journal ArticleDOI
Thermogravimetric characterization of corn stover as gasification and pyrolysis feedstock
TL;DR: In this article, the performance of mathematical models to predict the product gas quality rely on characterization of feed materials and the reaction kinetics of their thermal degradation, and the authors determined selected physical and chemical properties of corn stover related to thermochemical conversion.
Journal ArticleDOI
Kinetics of Biomass Pyrolysis: a Reformulated Three-Parallel-Reactions Model
TL;DR: In this paper, the thermal decomposition of sugarcane bagasse and waste-wood samples is studied using thermogravimetric analysis, and the weight loss associated with the pyrolysis process is simulated.
Journal ArticleDOI
The continuous flash pyrolysis of biomass
Donald S. Scott,Jan Piskorz +1 more
TL;DR: In this article, a continuous atmospheric pressure flash pyrolysis process for the production of organic liquids from cellulosic biomass has been demonstrated at a scale of 1-3 kg/hr of dry feed.