Co-pyrolysis of lignocellulosic biomass and plastics: A comprehensive study on pyrolysis kinetics and characteristics

Vo, Thuan Anh; Tran, Quoc Khanh; Ly, Hoang Vu; Kwon, Byeong Wan; Hwang, Hyun Tae; Kim, Jin-Soo; Kim, Seung-Soo

doi:10.1016/j.jaap.2022.105464

Cited by 73 publications

(6 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In general, the results found are similar for all the biochar samples, which indicate that the use of the catalyst does not have an appreciable influence on the characteristics of the biochar. The HHV values are, like the biochar, produced from plastics, such as HDPE [58] and PP [59], and are higher than biochar from municipal solid waste (MSW) mixture [60], plastic mix from MSW mixture [61] and lower than biochar from biomass [62,63]. Regarding elemental composition, a high carbon content was observed (from 50.0 to 70.9%), lower nitrogen (from 1.1 to 5.4%) lower hydrogen (from 3.1 to 9.4%), and no sulfur.…”

Section: Characterization Of Liquid Fractionmentioning

confidence: 99%

Characterization of the Products of the Catalytic Pyrolysis of Discarded COVID-19 Masks over Sepiolite

Ortega

Martín-Lara

Pula³

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

This research aims to develop a new strategy to valorize wasted COVID-19 masks based on chemical recycling by pyrolysis to convert them into useful products. First, surgical and filtering face piece masks, as defined in Europe by the EN 149 standard (FFP2), were thermally pyrolyzed at temperatures of 450, 500, and 550 °C, and the yields of valuable solid (biochar), liquid (biooil), and syngas products and their characteristics were determined. At low temperatures, biochar formation was favored over biooil and syngas production, while at high temperatures the syngas product yield was enhanced. The highest yield of biooil was found at a pyrolysis temperature of 500 °C, with both surgical and FFP2 masks achieving biooil yields of 59.08% and 58.86%, respectively. Then, the pyrolysis experiments were performed at 500 °C in a two-stage pyrolysis catalytic reactor using sepiolite as a catalyst. Sepiolite was characterized using nitrogen adsorption–desorption isotherms and Fourier-transform infrared spectroscopy. Results showed that the two-stage process increased the final yield of syngas product (43.89% against 39.52% for surgical masks and 50.53% against 39.41% for FFP2 masks). Furthermore, the composition of the biooils significantly changed, increasing the amount of 2,4-Dimethyl-1-heptene and other olefins, such as 3-Eicosene, (E)-, and 5-Eicosene, (E)-. Additionally, the methane and carbon dioxide content of the syngas product also increased in the two-stage experiments. Ultimately, the effect of sepiolite regeneration for its use in consecutive pyrolysis tests was examined. Characterization data showed that, the higher the use-regeneration of sepiolite, the higher the modification of textural properties, with mainly higher changes in its pore volume. The results indicated that the pyrolysis of face masks can be a good source of valuable products (especially from biooil and syngas products).

show abstract

Section: Characterization Of Liquid Fractionmentioning

confidence: 99%

Characterization of the Products of the Catalytic Pyrolysis of Discarded COVID-19 Masks over Sepiolite

Ortega

Martín-Lara

Pula³

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…The influence of cofeedstocks is currently being explored to increase syngas quality (CO:H 2 ratio), utilize waste, and improve byproducts, where research is still developing. Current findings suggest that co-feeding biomass with plastic feedstocks could have a synergistic effect on the quality of pyrolysis byproducts, where the lower oxygen concentration in plastic feedstocks lower oxygen concentrations and increase hydrogen and carbon concentration [58,[89][90][91][92]. However, most studies focus on the production of bio-oil and there is limited research on the impact on biochar structure and any corresponding update of POPS.…”

Section: Processesmentioning

confidence: 99%

“…Therefore, allowing the biochar from different particle sizes having different applications depending on their characteristics. The larger particle sizes could be used in iron sintering [104] and to make H 2 through steam activation [69,83,91] Lower particle sized char, with its more irregular shape [100], which along with an increased microporosity has higher absorbent properties and would be more useful in environmental applications such as water storage in soils and water purification [105][106][107]. Biochar produced through pyrolysis of ASR and other heterogenous materials may have similar positive effects on soil properties and water purification as traditional homogenous feedstocks, however this still has to be proved as research into this area is limited.…”

Section: Heterogeneous Biochar Feedstock: Automotive Shredder Residuementioning

confidence: 99%

PAHs, PCBs and Environmental Contamination in Char Products

Williams¹,

Khodier²,

Bentley³

2023

Biochar - Productive Technologies, Properties and Applications

View full text Add to dashboard Cite

Biochar can have unique benefits to terrestrial and aquatic ecosystems. Investigations of biochar effectiveness within these environments often come from homogenous feedstocks, such as plant biomass, which have simple thermochemical processing methods and produce physically and chemically stable biochar. Current methods to increase biochar production include the addition of oil-derived products such as plastics, which produces a more heterogenous feedstock. This feedstock is similar to materials from waste recycling streams. The adoption of more heterogenous feedstocks produces additional challenges to biochar production and use. This can result in pollution contained within the feedstock being transferred to the biochar or the creation of pollutants during the processing. With the current climate emergency, it is essential to eliminate environmental contamination arising from biochar production. It is critical to understand the physiochemical composition of biochar, where detailed analysis of contaminants is often overlooked. Contamination is common from heterogenous feedstocks but on commercial scales, even homogeneous biochar will contain organic pollutants. This chapter investigates biochar produced from various waste feedstocks and the challenges faced in thermochemical processing. Using Automotive Shredder Residue (ASR) as an example of a heterogeneous feedstock, the levels of contamination are explored. Potential solutions are reviewed while assessing the environmental and economic benefits of using biochar from mixed sources.

show abstract

“…The obtained synthetic oil and gas can be used as a feedstock to produce virgin quality plastic. Pyrolysis processes can be carried out not only with pure plastic waste feedstocks but also in the presence of other organic substances such as petrochemical by-products (high molecular oils and waxes) or biomass (lignocellulose). Through processing as co-pyrolysis, not only the material properties (viscosity, thermal conductivity) but also the chemical composition (C/H ratio, aromatic content) can be influenced, which has the potential to simplify the process.…”

Section: Introductionmentioning

confidence: 99%

Usefulness of Lumped Kinetic Modeling

Lorbach,

Lechleitner,

Zapf

et al. 2024

Chem Bio Eng.

View full text Add to dashboard Cite

Chemical recycling of plastic wastes through pyrolysis, gasification, or partial oxidation is a promising alternative to landfill disposal and incineration which must be applied in a future circular economy. These technologies enable the chemical industry, which currently heavily relies on crude oil, to obtain necessary chemical feedstock from postconsumer plastic waste. Kinetic models of pyrolysis and gasification reactions are required to dimension and design these processes on an industrial scale. The creation of detailed kinetic networks is often not feasible due to their complexity in this application, which is when the lumped kinetic modeling approach is used. This work develops and compares five lumped kinetic models for the co-pyrolysis of LDPE with a heavy petroleum fraction in a tubular reactor. A priori lumping is used for four models, and the fifth is created using a posteriori principle whereby in each model the product mixture is defined by eight lumps distinguished by their boiling point. The aim of this work is to compare different approaches for modeling reaction pathways in lumped kinetic models and to identify their impact on the predictive accuracy of the model. It was shown that all of the modeling approaches and the resulting models have similar prediction accuracies and deviations but with different kinetic parameters. Each model was used for a scale-up of an industrial-sized reactor to check whether the model had an influence on the design or predicted operation of the reactor.

show abstract

Co-pyrolysis of lignocellulosic biomass and plastics: A comprehensive study on pyrolysis kinetics and characteristics

Cited by 73 publications

References 57 publications

Characterization of the Products of the Catalytic Pyrolysis of Discarded COVID-19 Masks over Sepiolite

Characterization of the Products of the Catalytic Pyrolysis of Discarded COVID-19 Masks over Sepiolite

PAHs, PCBs and Environmental Contamination in Char Products

Usefulness of Lumped Kinetic Modeling

Contact Info

Product

Resources

About