Pyrolysis of hardwoods residues: on kinetics and chars characterization

Rocca, Patricia Andrea Della; Cerrella, E. G.; Bonelli, Pablo Ricardo; Cukierman, Ana Lea

doi:10.1016/s0961-9534(98)00067-1

Cited by 87 publications

(18 citation statements)

References 14 publications

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“…There is a large range of chemical composition variability among biochars as analyzed through proximate and ultimate analyses [Supplementary [42][43][44][45][46][47][48]. The ranges of chemical composition are the result of often uncontrolled and incomplete chemical and physical transformations that occur as a function of pyrolysis temperature, feedstock material, cooling and post-production conditions [25,32].…”

Section: Chemical Composition Variabilitymentioning

confidence: 99%

Review of the stability of biochar in soils: predictability of O:C molar ratios

Spokas¹

2010

Carbon Management

943

506

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Biochar is not a structured homogeneous material; rather it possesses a range of chemical structures and a heterogeneous elemental composition. This variability is based on the conditions of pyrolysis and the biomass parent material, with biochar spanning the range of various forms of black carbon. Thereby, this variability induces a broad spectrum in the observed rates of reactivity and, correspondingly, the overall chemical and microbial stability. From evaluating the current biochar and black carbon degradation studies, there is the suggestion of an overall relationship in biochar stability as a function of the molar ratio of oxygen to carbon (O:C) in the resulting black carbon. In general, a molar ratio of O:C lower than 0.2 appears to provide, at minimum, a 1000-year biochar half-life. The O:C ratio is a function of production temperature, but also accounts for other impacts (e.g., parent material and post-production conditioning/oxidation) that are not captured solely with production temperature. Therefore, the O:C ratio could provide a more robust indicator of biochar stability than production parameters (e.g., pyrolysis temperature and biomass type) or volatile matter determinations.

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Section: Chemical Composition Variabilitymentioning

confidence: 99%

Review of the stability of biochar in soils: predictability of O:C molar ratios

Spokas¹

2010

Carbon Management

943

506

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“…To our best knowledge, there is no information related to the characterization and utilization of char produced from biomass hydrothermal conversion and, only limited reports on the application of chars from high-temperature pyrolysis [16][17][18][19]. In this study, pinewood was selected as a representative of waste biomass and two types of chars from pinewood thermochemical conversion processes were characterized and applied as adsorbents for copper removal from aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

Characterization and application of chars produced from pinewood pyrolysis and hydrothermal treatment

Liu

Zhang

2010

Fuel

469

134

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a b s t r a c tTwo types of pinewood chars, hydrothermal char (H300) and pyrolytic char (P700) from biomass-toenergy conversion were characterized and used as adsorbent for the copper removal from aqueous solution. The result showed that the pinewood underwent a deeper carbonization during pyrolysis process and more activated sites available and stable carbon-oxygen complex existed after hydrothermal treatment. Comparing with raw pinewood, hydrothermal treatment increased 95% total oxygen-containing groups (carboxylic, lactone and phenolic group) while 56% oxygen-containing groups decreased after pyrolysis process. SEM analysis indicated that both hydrothermal and pyrolytic processes developed rough surface with new cavities on the chars, and the BET surface area were 21 and 29 m 2 /g for H300 and P700, respectively. Although H300 had lower surface area, its adsorption capacity for copper was much higher than P700 since ion-exchange reaction was the predominant removal mechanism by H300, while physical adsorption dominated by P700. The adsorption data could be well described by Langmuir isotherm model for copper onto both H300 and P700.

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“…The products of the thermochemical processes are divided into a volatile fraction consisting of gases, vapors, and tar components and a carbon-rich solid residue (Yaman, 2004). Thermal conversion of biomass has received special attention since it leads to useful products and simultaneously contributes to solving pollution problems arising from biomass accumulation (Rocha et al, 1999). Biochemical processes are essentially microbic digestion and fermentation.…”

Section: An Overview Of Biomass Conversion Processesmentioning

confidence: 99%

Global Status of Biomass Energy Use

Balat¹

2009

Energy Sources, Part A: Recovery, Utilization, and Environmenta

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The aim of this article is to investigate the contribution of biomass energy to global energy demand and energy production from biomass. Biomass energy plays a vital role in meeting local energy demand in many regions of the developing world. Biomass energy utilization has gained particular interest in recent years due to the progressive depletion of conventional fossil fuels, which calls for an increased use of renewable energy sources. Biomass energy is more economical to produce and it provides more energy than other energy forms. Biomass production is eight times greater than the total annual world consumption of all other energy sources.

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Pyrolysis of hardwoods residues: on kinetics and chars characterization

Cited by 87 publications

References 14 publications

Review of the stability of biochar in soils: predictability of O:C molar ratios

Review of the stability of biochar in soils: predictability of O:C molar ratios

Characterization and application of chars produced from pinewood pyrolysis and hydrothermal treatment

Global Status of Biomass Energy Use

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