Influence of moisture and feedstock form on the pyrolysis behaviors, pyrolytic gas production, and residues micro-structure evolutions of an industrial sludge from a steel production enterprise

Chen, Jianbiao; Gao, Shuaifei; Xu, Fang; Xu, Wenhao; Yang, Yaqiong; Kong, De‐Xing; Wang, Yinfeng; Hu-qing, Yao; Chen, Haijun; Zhu, Yuezhao; Mu, Lin

doi:10.1016/j.energy.2022.123603

Cited by 11 publications

(2 citation statements)

References 46 publications

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“…When the pyrolysis temperature reached 700 °C, C 2 –C 3 had a secondary cracking reaction, resulting in a decrease in C 2 –C 3 content. When the pyrolysis temperature was between 400 and 600 °C, the reduction of CO 2 to CO derived a decline in CO 2 . Nevertheless, the dominant reaction of CO with H 2 O reduced the CO content.…”

Section: Resultsmentioning

confidence: 99%

“…When the pyrolysis temperature was between 400 and 600 °C, the reduction of CO 2 to CO derived a decline in CO 2 . 25 Nevertheless, the dominant reaction of CO with H 2 O reduced the CO content. Although the high temperature reduced the percentage of H 2 , the yield of H 2 increased by the thorough cracking of organic matter.…”

Section: Product Distribution Of Oily Sludge Pyrolysismentioning

confidence: 99%

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Behavior Study of Migration and Transformation of Heavy Metals during Oily Sludge Pyrolysis

Quan

Zhang

et al. 2022

Energy Fuels

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This paper studied the migration, transformation, leaching toxicity, and risk assessment of heavy metals when oily sludge was pyrolyzed at multiple pyrolysis temperatures and residence times. Results indicated that heavy metals were enriched in char, while less than 3% of heavy metals were distributed to gas and liquid products. By the modified European Community Bureau of Reference sequential extraction method, it was found that the most immobilized Cr, Ni, and Pb were obtained under conditions of 600 °C for 30 min, 400 °C for 60 min, and 500 °C for 60 min, respectively. However, pyrolysis reduced the percentage of stable fractions in Cu and Zn. Similarly, the leaching concentrations of Cr, Ni, and Pb decreased through pyrolysis, while that of Zn increased. Risk assessment code results suggested that pyrolysis reduced the environmental risk of Pb but increased that of Zn. Meanwhile, the mechanism of heavy metal migration and transformation was explored by characterizing with proximate analysis, ultimate analysis, X-ray fluorescence, Fourier transform infrared spectroscopy, and X-ray diffraction. The results indicated that aromatization and mineral crystals in chars influenced the immobilization of heavy metals.

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Section: Resultsmentioning

confidence: 99%

Section: Product Distribution Of Oily Sludge Pyrolysismentioning

confidence: 99%

Behavior Study of Migration and Transformation of Heavy Metals during Oily Sludge Pyrolysis

Quan

Zhang

et al. 2022

Energy Fuels

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Pyrolysis of açai stems (Euterpe oleracea Mart.) and cocoa husks (Theobroma cacao L.) residues for the generation of added-value products in rural areas

Lara Prado,

Surculento Villalobos,

Lopez

et al. 2024

Biomass Conv. Bioref.

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Generally, agriculture activities represent the main economic income of rural areas, and during these, huge amounts of biomass are generated. This biomass is considered as garbage due to its high storage cost. However, energy and added-value products can be recovered from biomass. Within this context, açai stems and cocoa husks were collected from different rural areas of Bolivia due to their high importance in the local and international markets as two of the most available products of the country. The preliminary study will contribute in the field of green energy recovery and resource management. Thus, in this study, both residues were tested as renewable feedstocks for the generation of added-value products from pyrolysis at 500 °C for 30 min. Açai stems were found to be more suitable to biochar based with yields up to 49.1% ± 2.4%, but also for biogas production (33.9% ± 2.0%). Cocoa husk was also found to be more suitable for biochar production (38.1% ± 1.7%) but also for bio-oils (33.6% ± 17.6%). Both resulting biochars had basic pH (between 10 and 12) and low density (287.2 kg/m3 and 401.7 kg/m3). Additionally, the lack of heavy metals on the surface makes both biochar products good candidates for soil amendment applications. Furthermore, the bio-oil composition is complex and varied, and products such as Maltol, 2-methyl furane, and D-allose have direct applications in the food industry. Moreover, the presence of phenolic compounds and hydrocarbons with more than five carbons in the structure makes the obtained bio-oils suitable for upgrading processes for biofuel production. Finally, the obtained biogases can be applied for local electricity generation, or to reduce the energy requirements for the pyrolysis reactor. Graphical Abstract

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Machine learning prediction of pyrolytic products of lignocellulosic biomass based on physicochemical characteristics and pyrolysis conditions

Dong

Bai

et al. 2023

Bioresource Technology

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Influence of moisture and feedstock form on the pyrolysis behaviors, pyrolytic gas production, and residues micro-structure evolutions of an industrial sludge from a steel production enterprise

Cited by 11 publications

References 46 publications

Behavior Study of Migration and Transformation of Heavy Metals during Oily Sludge Pyrolysis

Behavior Study of Migration and Transformation of Heavy Metals during Oily Sludge Pyrolysis

Pyrolysis of açai stems (Euterpe oleracea Mart.) and cocoa husks (Theobroma cacao L.) residues for the generation of added-value products in rural areas

Machine learning prediction of pyrolytic products of lignocellulosic biomass based on physicochemical characteristics and pyrolysis conditions

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