Characteristics of bio-oil and biochar from cotton stalk pyrolysis: Effects of torrefaction temperature and duration in an ammonia environment

Zhao, An; Liu, Shanjian; Yao, Jingang; Huang, Fei; He, Zhisen; Liu, Jia

doi:10.1016/j.biortech.2021.126145

Cited by 31 publications

(8 citation statements)

References 39 publications

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“…Regarding heating rates, these were selected based on literature studies of slow and intermediate pyrolysis for biochar and bio-oil production 34,40 and on previous experience of biomass pyrolysis studies in the reactor used. 27 For each experiment, the amount of biomass batch loaded and the amount of biochar and bio-oil produced were quanti-ed.…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…However, most of the studies on the pyrolysis of biomass rely on a specic biomass type and on the yield and characteristics of a specic product or application, and mostly on biochar and bio-oil. [31][32][33][34] In fact, it is recognized that a more comprehensive approach is needed, involving the integrated analysis of pyrolysis experiments using different types of residual biomass, including the analysis of the distribution and characteristics of the resulting products, biochar, bio-oil and gas, and the inuence of process conditions such as the temperature and heating rate, to drive the development of pyrolysis projects and their expansion into industrial production.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Valorisation of residual biomass by pyrolysis: influence of process conditions on products

Vilas-Boas,

Tarelho,

Oliveira

et al. 2024

Sustainable Energy Fuels

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Valorisation of residual biomass by pyrolysis: influence of process conditions on products

Vilas-Boas,

Tarelho,

Oliveira

et al. 2024

Sustainable Energy Fuels

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show abstract

“…Pyrolysis has been proposed as a potentially efficient and feasible treatment and disposal alternative for municipal sewage sludge (Leng et al 2020;Huang et al 2022;Mohamed et al 2022b). During the pyrolysis process, non-condensable gases, bio-oil and biochar, are generated (Leng et al 2022), thus avoiding the creation of secondary toxic contaminants (Mohamed et al 2020(Mohamed et al , 2021aAbou Rjeily et al 2021;Suresh et al 2021;Zhao et al 2022). The transformation of biomass waste into biochar has several agronomic and environmental advantages.…”

Section: Introductionmentioning

confidence: 99%

Co-pyrolysis of sewage sludge and biomass for stabilizing heavy metals and reducing biochar toxicity: A review

et al. 2022

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The huge amounts of sewage sludge produced by municipal wastewater treatment plants induce major environmental and economical issues, calling for advanced disposal methods. Traditional methods for sewage sludge disposal increase greenhouse gas emissions and pollution. Moreover, biochar created from sewage sludge often cannot be used directly in soil applications due to elevated levels of heavy metals and other toxic compounds, which alter soil biota and earthworms. This has limited the application of sewage sludge-derived biochar as a fertilizer. Here, we review biomass and sewage sludge co-pyrolysis with a focus on the stabilization of heavy metals and toxicity reduction of the sludge-derived biochar. We observed that co-pyrolyzing sewage sludge with biomass materials reduced heavy metal concentrations and decreased the environmental risk of sludge-derived biochar by up to 93%. Biochar produced from sewage sludge and biomass co-pyrolysis could enhance the reproduction stimulation of soil biota by 20‒98%. Heavy metals immobilization and transformation are controlled by the co-feed material mixing ratio, pyrolysis temperature, and pyrolysis atmosphere.

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“…Due to the modifying effect of nitrogen, the CO 2 adsorption and catalytic activities of nitrogen-doped biochar are greatly enhanced compared with biochar. The nitrogen-rich bio-oil is much more valuable due to its richness in nitrogen heterocyclic compounds. , Li et al reported the introduction of exogenous nitrogen (ammonium acetate, urea, ammonium sulfate, and ammonium dihydrogen phosphate) in a fixed-bed reactor for the pyrolysis of rice husk, which could convert carbonyl compounds in bio-oil into nitrogen-containing heterocyclic compounds and improve bio-oil stability. Meanwhile, the resulting nitrogen-doped biochar had high nitrogen content, adsorption activity, specific surface area, and excellent electrochemical properties.…”

Section: Introductionmentioning

confidence: 99%

Comparative Assessment of Proportions of Urea in Blend for Nitrogen-Rich Pyrolysis: Characteristics and Distribution of Bio-Oil and Biochar

Liu

Zhao

et al. 2022

ACS Omega

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This study aimed to investigate the effect of the urea content on the characteristics and distribution of nitrogen-rich biooil and nitrogen-doped biochar. Cellulose, cellobiose, and glucose were used as feedstock. Urea was used as the exogenous nitrogen source in nitrogen-rich pyrolysis at 500 °C. The order of the nitrogen increase in the nitrogen-doped biochar was cellulose < cellobiose < glucose. Nitrogen-doped biochar consisted of abundant nitrogen and nitrogenous functional groups, and the stability of biochar was optimal. The nitrogen-doped biochar obtained from cellulose showed the optimal adsorption performance for diethyl phthalate with 50% urea addition. When the proportion of urea was 20%, the content of anhydro-sugars in biooil reached the maximum value (61.86%). Furans and other smallmolecule oxygenates were intermediates to produce nitrogenous heterocyclic compounds (NHCs) from cellulose. When the proportion of urea was 40%, the bio-oil had the highest selectivity (91.63%) of NHCs. The NHCs in the obtained bio-oil mainly consisted of pyrroles, pyrimidines, pyridines, imidazoles, and pyrazines. Therefore, the excellent proportion of urea in the blend could promote the generation of high-value NHCs and nitrogen-doped biochar from the nitrogen-rich pyrolysis of cellulose (and its model compounds).

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Characteristics of bio-oil and biochar from cotton stalk pyrolysis: Effects of torrefaction temperature and duration in an ammonia environment

Cited by 31 publications

References 39 publications

Valorisation of residual biomass by pyrolysis: influence of process conditions on products

Valorisation of residual biomass by pyrolysis: influence of process conditions on products

Co-pyrolysis of sewage sludge and biomass for stabilizing heavy metals and reducing biochar toxicity: A review

Comparative Assessment of Proportions of Urea in Blend for Nitrogen-Rich Pyrolysis: Characteristics and Distribution of Bio-Oil and Biochar

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