Cross-interaction during Co-gasification of wood, weed, plastic, tire and carton

Salavati, Saman; Zhang, Chenting; Zhang, Shu; Liu, Qing; Hu, Xun

doi:10.1016/j.jenvman.2019.109467

Cited by 47 publications

(21 citation statements)

References 44 publications

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“…24 showed the C (1 2 0) facets of the aromatics carbon sheets. [40][41][42] Its abundance was higher in the char produced from the non-catalytic pyrolysis than that in the pyrolysis with the biochar catalyst. Additionally, the height of the peak was calculated and is indicated in Table 5.…”

Section: Xrd Ft-ir Tpo Raman and Tg Analysismentioning

confidence: 97%

“…The symmetric and asymmetric modes of aliphatic C H stretching was recorded at 2900 cm −1 . [40][41][42] Slightly lower intensity was observed for C H for the catalytic pyrolysis, which showed their conversion into other compounds. The band appeared at 1750 cm −1 is attributed to the C O stretching of carbonyl group.…”

Section: Uv-fluorescence Spectroscopy and Ft-ir Analysismentioning

confidence: 99%

“…The small band at 1450 cm −1 was attributed to aromatic or aliphatic bending of methyl and methylene. 7,[40][41][42] The band at 1250 cm −1 was attributed to the C O stretching of the phenolics in the tar, which had slightly higher intensity in the presence of catalysts. This indicated the higher rate of cracking of large aromatics in the structure of poplar wood or higher rate of aromatization of unsaturated species such as alkenes.…”

Section: Uv-fluorescence Spectroscopy and Ft-ir Analysismentioning

confidence: 99%

“…The peak at 22 was related to aromatic carbon sheets in the biochar, while the peak at 42 was ascribed to the graphite-free crystal surface. [40][41][42][43][44][45] The height of the peaks was measured and the results were presented in Table 5. In the used biochar catalyst, the intensity of this peak was slightly lower, which indicated the lower crystallinity of the aromatic sheet structure of the biochar.…”

Section: Drifts Characterizationmentioning

confidence: 99%

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Biochar catalyzing polymerization of the volatiles from pyrolysis of poplar wood

Zhang

et al. 2021

Int J Energy Res

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In this study, the pyrolysis of poplar wood chips with biochar catalyst produced from gasification of the same poplar wood chips was conducted, aiming to probe its influence on the evolution of the pyrolysis products. From the results, it was concluded that the biochar catalyst enhanced the polymerization of the volatiles produced from the pyrolysis, and thus reduced the yields of the gaseous compounds while increased the yield of char. The carbonaceous deposit on surface of the char was oxygen-rich and more aliphatic, which decreased the thermal stability and crystallinity of the char, while made the char prone to oxidation. The biochar catalyst also promoted the formation of methoxy phenols at the expense of alkyl phenols, and the formation of the phenolics with bigger π-conjugated structures. In addition, the volatile-biochar interaction removed the defective structures in the large aromatic structures in the biochar catalyst. Highlights• Biochar catalyzed polymerization, but not cracking, of volatiles in pyrolysis.• Biochar catalyst enhances char formation while reduces gas formation in pyrolysis.• Char in catalytic pyrolysis is more O-rich and aliphatic and low thermal stability.• Biochar catalyzed condensation of volatiles to form bigger fused ring structures.• Biochar-volatiles interaction removes defective structure in fused ring of biochar. K E Y W O R D Sbiochar catalyst, catalytic pyrolysis, coke formation, poplar wood, product properties | INTRODUCTIONBiomass is an abundantly available and renewable resource, which can be used to produce fuels via thermochemical processes such as pyrolysis. 1,2 Via pyrolysis, biooil, char, and gaseous compounds were obtained from biomass. 3,4 Bio-oil is the major products with the yield ranging from 45 to 75%, depending on the process conditions such as temperature, reactor design, heating rate, particle size of biomass, etc. [4][5][6][7] In general, bio-oil has a high amount of oxygen, leading to its high acidity, low thermal stability, and low heating value, which makes it

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Section: Xrd Ft-ir Tpo Raman and Tg Analysismentioning

confidence: 97%

Section: Uv-fluorescence Spectroscopy and Ft-ir Analysismentioning

confidence: 99%

Section: Uv-fluorescence Spectroscopy and Ft-ir Analysismentioning

confidence: 99%

Section: Drifts Characterizationmentioning

confidence: 99%

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Biochar catalyzing polymerization of the volatiles from pyrolysis of poplar wood

Zhang

et al. 2021

Int J Energy Res

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“…Interactions between fractions of RDF during co-gasification have been proved to have a significant impact on the product distribution [17]. Additionally, these interactions cause a decrease in the total tar and char yield as compared to the gasification of individual RDF fractions.…”

Section: Introductionmentioning

confidence: 99%

Gasification of RDF and Its Components with Tire Pyrolysis Char as Tar-Cracking Catalyst

2020

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The composition of gas produced by the gasification of refuse-derived fuel (RDF) can be affected by the content of individual components of RDF and their mutual interactions. In this work, plastics, paper, wood, textile and RDF were gasified in a two-stage gasification system and the obtained tar yields and product gas quality were compared. The two-stage reactor consisted of an air-blown gasifier and a catalytic reactor filled with carbonized tire pyrolysis char as the tar-cracking catalyst. Tire pyrolysis char is a promising alternative to expensive catalysts. The impact of temperature and catalyst amount on the tar yield and gas composition was investigated. Theoretical oxygen demand for all material classes was calculated and its effect on gas composition and tar yield is discussed. The results indicate that the gasification of plastics produces the highest amount of tar and hydrocarbon gases, while the CO2 content of the product gas remains the lowest compared to all other materials. On the other hand, the paper fraction produced hydrogen-rich gas with low tar content. The gasification of RDF at 700 °C provided the lowest tar yield compared to all other materials, indicating positive synergic effects of lignocellulosic biomass and plastics in tar reduction. The significance of these interactions was suppressed at the highest temperature of 900 °C, as the thermal cracking of tar became dominant. For CO2 content, a negative synergic effect (higher CO2 concentration) was observed.

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Coke Formation and Zeolite Catalyst Effects on Products from Co‐pyrolysis of Waste Tyre and Poplar Wood in a Semi‐Batch Reactor under N₂ Atmosphere

Hoseini,

Atashi,

Gholizadeh

et al. 2024

Energy Tech

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Herein, it is aimed to investigate the effect of zeolite catalyst on the co‐pyrolysis process of waste tyre and poplar wood. A laboratory‐sized reactor is used to pyrolyze 15 g of sample at 500 °C under atmospheric pressure. In the results, it is indicated that co‐pyrolysis affects the properties of the products. Comparing to single feedstock, the co‐pyrolysis enhances the yields of bio‐oil, while reducing the formation of char. The pyrolysis of poplar wood produces 23.3 wt% of bio‐oil, while the pyrolysis of tyre yields 25 wt% of bio‐oil. However, it is 31.29 wt% for the co‐pyrolysis process. Higher content of valuable compounds are formed in the bio‐oil, which improve the fuel properties of the bio‐oil. The zeolite catalyst alters the characteristics of the products obtained from the co‐pyrolysis process. The gaseous products show a decrease in the concentrations of carbon monoxide and carbon dioxide when the catalyst is present. The liquid product analysis reveals the presence of light aromatics such as ethyl benzene and light linear compounds such as alkanes including octane, hexane, etc. The analysis of the catalysts suggests that a very small amount of coke deposits on the catalyst due to the slight increase in carbon content.

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Cross-interaction during Co-gasification of wood, weed, plastic, tire and carton

Cited by 47 publications

References 44 publications

Biochar catalyzing polymerization of the volatiles from pyrolysis of poplar wood

Biochar catalyzing polymerization of the volatiles from pyrolysis of poplar wood

Gasification of RDF and Its Components with Tire Pyrolysis Char as Tar-Cracking Catalyst

Coke Formation and Zeolite Catalyst Effects on Products from Co‐pyrolysis of Waste Tyre and Poplar Wood in a Semi‐Batch Reactor under N₂ Atmosphere

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Cross-interaction during Co-gasification of wood, weed, plastic, tire and carton

Cited by 47 publications

References 44 publications

Biochar catalyzing polymerization of the volatiles from pyrolysis of poplar wood

Biochar catalyzing polymerization of the volatiles from pyrolysis of poplar wood

Gasification of RDF and Its Components with Tire Pyrolysis Char as Tar-Cracking Catalyst

Coke Formation and Zeolite Catalyst Effects on Products from Co‐pyrolysis of Waste Tyre and Poplar Wood in a Semi‐Batch Reactor under N2 Atmosphere

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Coke Formation and Zeolite Catalyst Effects on Products from Co‐pyrolysis of Waste Tyre and Poplar Wood in a Semi‐Batch Reactor under N₂ Atmosphere