Catalytic co-pyrolysis of biomass and waste plastics as a route to upgraded bio-oil

Dyer, Andrew C.; Nahil, Mohamad A.; Williams, Paul T.

doi:10.1016/j.joei.2021.03.022

Cited by 86 publications

(20 citation statements)

References 34 publications

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“…Pyrolysis is the thermal transformation of polymers into liquid fuels and value-added products at considerably high temperatures (300-900°C) in the absence of oxygen [ 17 - 19 ]. PET pyrolysis releases products such as TPA, vinyl terephthalate, aromatic compounds (namely toluene and benzene); esters such as vinyl benzoate; carboxylic acids such as ethyl and methyl benzoic acid; and aliphatic hydrocarbons such as ethane and methanol.…”

Section: Substrate Production By Pyrolysis Of Petmentioning

confidence: 99%

Recent Advances in the Chemobiological Upcycling of Polyethylene Terephthalate (PET) into Value-Added Chemicals

Mudondo

Lee

Jeong

et al. 2022

J. Microbiol. Biotechnol.

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Polyethylene terephthalate (PET) is a plastic material commonly applied to beverage packaging used in everyday life. Owing to PET’s versatility and ease of use, its consumption has continuously increased, resulting in considerable waste generation. Several physical and chemical recycling processes have been developed to address this problem. Recently, biological upcycling is being actively studied and has come to be regarded as a powerful technology for overcoming the economic issues associated with conventional recycling methods. For upcycling, PET should be degraded into small molecules, such as terephthalic acid and ethylene glycol, which are utilized as substrates for bioconversion, through various degradation processes, including gasification, pyrolysis, and chemical/biological depolymerization. Furthermore, biological upcycling methods have been applied to biosynthesize value-added chemicals, such as adipic acid, muconic acid, catechol, vanillin, and glycolic acid. In this review, we introduce and discuss various degradation methods that yield substrates for bioconversion and biological upcycling processes to produce value-added biochemicals. These technologies encourage a circular economy, which reduces the amount of waste released into the environment.

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Section: Substrate Production By Pyrolysis Of Petmentioning

confidence: 99%

Recent Advances in the Chemobiological Upcycling of Polyethylene Terephthalate (PET) into Value-Added Chemicals

Mudondo

Lee

Jeong

et al. 2022

J. Microbiol. Biotechnol.

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“…In recent studies, pyrolysis technology in MSW treatment was proposed as a promising low-carbon process. , For example, Dyer et al and Jin et al reported that the copyrolysis of biomass and polymers is a potential waste recycling route for producing high-yield and high-value energy. , However, most of these studies have not highlighted the importance of residual char in solid waste pyrolysis, which might have considerable redox potential and can be used as a catalyst. The study on the production of CR via the copyrolysis of plastic and biomass based solid waste is lacking.…”

Section: Introductionmentioning

confidence: 99%

Carbon Residue from Copyrolysis of Cartons and Plastics As an Efficient H₂O₂ Activator

Meng

et al. 2023

ACS EST Eng.

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The recent significant increase in the amount of municipal solid waste (MSW) is a remarkable environmental issue. Pyrolysis is a promising thermal treatment process, as it can reduce MSW and produce some valuable products as well. This study evaluated the potential of the carbon residue (CR) as an efficient H 2 O 2 activator. The CR was produced from the copyrolysis of a mixture of abandoned cartons and plastic wraps, which are becoming increasingly dominant in MSW. The results show an interesting interaction between cartons and PVC, that the introduction of PVC into the carton greatly enhanced the activation rates of H 2 O 2 by CR below the ratio of 0.2:1 (PVC/ carton, w/w), whereas higher PVC content lowered its activation ability. EPR signals under different conditions revealed that CR directly activated H 2 O 2 to mainly produce • O 2 − , which was responsible for pollutant degradation. A mechanistic study suggested that the rates of H 2 O 2 activation were mainly governed by two factors: the amount of oxidative sites on CR and the conductivity of CR, which both were also quantitatively correlated with the activation rates of H 2 O 2 . Surface defects and surface-bound radicals were attributed to the two factors, respectively. The introduction of a limited amount of PVC to the carton greatly increased both factors mainly contributed from the generation of HCl during pyrolysis of PVC. In summary, this study may provide some new insights on the catalytic features of CRs, which are generated from the pyrolysis of a mixture of abandoned plastic wraps and cartons.

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“…Although improvements in the product oil have been reported for copyrolysis of biomass with plastics, the quality is not sufficient for direct use as a fuel and therefore addition of a catalyst, mainly zeolites, has been investigated [22,23]. In particular, there has also been research into the co-pyrolysis of biomass and polystyrene coupled with zeolite catalysis [24][25][26][27][28]. For example, Kumar and Srinivas [27] used a fixed bed slow co-pyrolysis-catalytic reactor for the production of liquid fuels from biomass and polystyrene using spent FCC zeolite catalyst.…”

Section: Introductionmentioning

confidence: 99%

“…They reported that increased addition of polystyrene in the biomass produced an upgraded bio-oil with a high content of styrene, ethylbenzene, styrene oligomers, benzene derivatives and polycyclic aromatic compounds. Our previous work [28] used a two-stage fixed bed pyrolysis-catalytic reactor to investigate the co-pyrolysis of biomass and plastics, including polystyrene with a ZSM-5 zeolite catalyst. The product upgraded bio-oil contained mainly C 5 -C 12 fuel range hydrocarbons and with a high content of 1-4 ring aromatic compounds.…”

Section: Introductionmentioning

confidence: 99%

Biomass:polystyrene co-pyrolysis coupled with metal-modified zeolite catalysis for liquid fuel and chemical production

Dyer

Nahil

Williams

2022

J Mater Cycles Waste Manag

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Biomass and waste polystyrene plastic (ratio 1:1) were co-pyrolysed followed by catalysis in a two-stage fixed bed reactor system to produce upgraded bio-oils for production of liquid fuel and aromatic chemicals. The catalysts investigated were ZSM-5 impregnated with different metals, Ga, Co, Cu, Fe and Ni to determine their influence on bio-oil upgrading. The results showed that the different added metals had a different impact on the yield and composition of the product oils and gases. Deoxygenation of the bio-oils was mainly via formation of CO2 and CO via decarboxylation and decarbonylation with the Ni–ZSM-5 and Co–ZSM-5 catalysts whereas higher water yield and lower CO2 and CO was obtained with the ZSM-5, Ga–ZSM-5, Cu–ZSM-5 and Fe–ZSM-5 catalysts suggesting hydrodeoxygenation was dominant. Compared to the unmodified ZSM-5, the yield of single-ring aromatic compounds in the product oil was increased for the Co–ZSM-5, Cu–ZSM-5, Fe–ZSM-5 and Ni–ZSM-5 catalysts. However, for the Ga–ZSM-5 catalyst, single-ring aromatic compounds were reduced, but the highest yield of polycyclic aromatic hydrocarbons was produced. A higher biomass to polystyrene ratio (4:1) resulted in a markedly lower oil yield with a consequent increased yield of gas.

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Catalytic co-pyrolysis of biomass and waste plastics as a route to upgraded bio-oil

Cited by 86 publications

References 34 publications

Recent Advances in the Chemobiological Upcycling of Polyethylene Terephthalate (PET) into Value-Added Chemicals

Recent Advances in the Chemobiological Upcycling of Polyethylene Terephthalate (PET) into Value-Added Chemicals

Carbon Residue from Copyrolysis of Cartons and Plastics As an Efficient H₂O₂ Activator

Biomass:polystyrene co-pyrolysis coupled with metal-modified zeolite catalysis for liquid fuel and chemical production

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Catalytic co-pyrolysis of biomass and waste plastics as a route to upgraded bio-oil

Cited by 86 publications

References 34 publications

Recent Advances in the Chemobiological Upcycling of Polyethylene Terephthalate (PET) into Value-Added Chemicals

Recent Advances in the Chemobiological Upcycling of Polyethylene Terephthalate (PET) into Value-Added Chemicals

Carbon Residue from Copyrolysis of Cartons and Plastics As an Efficient H2O2 Activator

Biomass:polystyrene co-pyrolysis coupled with metal-modified zeolite catalysis for liquid fuel and chemical production

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Carbon Residue from Copyrolysis of Cartons and Plastics As an Efficient H₂O₂ Activator