Kinetics and reaction chemistry of pyrolysis and combustion of tobacco waste

Wu, Weixuan; Mei, Yuanfei; Zhang, Le; Cai, Junmeng

doi:10.1016/j.fuel.2015.04.016

Cited by 134 publications

(56 citation statements)

References 62 publications

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“…The apparent activation energy calculated for BSG (one-step process), for the conversion range between 5% and 85% resulted in values from 187-338 kJ mol −1 , with an average of 285 kJ mol −1 . Obtained values were similar to coffee ground residues (~190-353 kJ mol −1 ) presented in the work of Mašek et al [38], but they were a bit higher than those obtained for other biomasses, e.g., tobacco plant waste (118-257 kJ mol −1 ) [51] and rice husk (221-229 kJ mol −1 ) [52]. The activation energies calculated for the pyrolysis of the hydrochars were in the ranges 63-214 kJ mol −1 , 85-256 kJ mol −1 , and 83-279 kJ mol −1 for HTC-180-4, HTC-220-2, and HTC-220-4, respectively.…”

Section: Pyrolysis Kineticssupporting

confidence: 82%

Pyrolysis Kinetics of Hydrochars Produced from Brewer’s Spent Grains

et al. 2019

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The current market situation shows that large quantities of the brewer’s spent grains (BSG)—the leftovers from the beer productions—are not fully utilized as cattle feed. The untapped BSG is a promising feedstock for cheap and environmentally friendly production of carbonaceous materials in thermochemical processes like hydrothermal carbonization (HTC) or pyrolysis. The use of a singular process results in the production of inappropriate material (HTC) or insufficient economic feasibility (pyrolysis), which hinders their application on a larger scale. The coupling of both processes can create synergies and allow the mentioned obstacles to be overcome. To investigate the possibility of coupling both processes, we analyzed the thermal degradation of raw BSG and BSG-derived hydrochars and assessed the solid material yield from the singular as well as the coupled processes. This publication reports the non-isothermal kinetic parameters of pyrolytic degradation of BSG and derived hydrochars produced in three different conditions (temperature-retention time). It also contains a summary of their pyrolytic char yield at four different temperatures. The obtained KAS (Kissinger–Akahira–Sunose) average activation energy was 285, 147, 170, and 188 kJ mol−1 for BSG, HTC-180-4, HTC-220-2, and HTC-220-4, respectively. The pyrochar yield for all hydrochar cases was significantly higher than for BSG, and it increased with the severity of the HTC’s conditions. The results reveal synergies resulting from coupling both processes, both in the yield and the reduction of the thermal load of the conversion process. According to these promising results, the coupling of both conversion processes can be beneficial. Nevertheless, drying and overall energy efficiency, as well as larger scale assessment, still need to be conducted to fully confirm the concept.

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Section: Pyrolysis Kineticssupporting

confidence: 82%

Pyrolysis Kinetics of Hydrochars Produced from Brewer’s Spent Grains

et al. 2019

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“…Cellulose is a polymer of β-D-glucopyranose moieties linked via β-(1,4) glycosidic bonds with well documented polymorphs [113]. Hemicellulose is a polymer consisting of short branched chains of sugars.…”

Section: General Introductionmentioning

confidence: 99%

Review of physicochemical properties and analytical characterization of lignocellulosic biomass

Cai

et al. 2017

Renewable and Sustainable Energy Reviews

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554

225

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“…In addition, a wide range of gas, liquid, and solid fuel options are possible by HTL, depending on the fuel market conditions [10]. HTL has the flexibility for processing various categories of biomass feedstock such as wastes, aquatic, lignocellulosic, herbaceous, food processing wastes, fungus [8,14], cyanobacteria as well as the biochemical wastes resulted from macro and microorganisms [7,[14][15][16][17][18][19][20][21]. This review focuses on microalgal feedstock, despite diverse HTL feedstocks beeing reported in the literature [14,[22][23][24][25].…”

Section: Potential and Availability Of Microalgae As Energy Sourcementioning

confidence: 99%

Continuous Hydrothermal Liquefaction for Biofuel and Biocrude Production from Microalgal Feedstock

Lababpour¹

2018

ChemBioEng Reviews

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Microalgal biomass processing by continuous hydrothermal liquefaction (HTL) has recently received much interest and can be used to convert microalgal biomass to biocrude oil and drop‐in fuels. This review focuses on the conversion of microalgae biomass to energy production through continuous HTL processes. In addition, processes for upgrading feedstocks and biocrude are also discussed. The feed of the biomass slurry is treated according to size and moisture regulations. Following separation of the gaseous, liquid, and solid phases, the determination of elemental, physical, and chemical fragments, yield of energy, and other properties of the various products is carried out. Homogeneous or heterogeneous catalysts improve the biocrude yield and quality as does higher moisture content. The high percentage of N2 and O2 in the feedstock results in lower quality products. This may be resolved through pre‐processing of the biomass, controlling of HTL processes conditions, and post‐upgrading processing of the HTL products. The promising potential of microalgae biomass for biocrude and drop‐in fuels may have an important contribution to the world's renewable energy sources through HTL in the near future.

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Kinetics and reaction chemistry of pyrolysis and combustion of tobacco waste

Cited by 134 publications

References 62 publications

Pyrolysis Kinetics of Hydrochars Produced from Brewer’s Spent Grains

Pyrolysis Kinetics of Hydrochars Produced from Brewer’s Spent Grains

Review of physicochemical properties and analytical characterization of lignocellulosic biomass

Continuous Hydrothermal Liquefaction for Biofuel and Biocrude Production from Microalgal Feedstock

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