Experimental investigation on liquefaction of plastic waste to oil in supercritical water

Bai, Baojun; Jin, Hui; Fan, Chao; Chen, Cao; Wei, Wenwen; Cao, Wen

doi:10.1016/j.wasman.2019.04.017

Cited by 112 publications

(48 citation statements)

References 54 publications

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“…Pyrolysis of plastic waste has been explored to convert plastic waste into fuel at high temperatures, while using a catalyst enhances the degradation and reduces the energy requirements ( Yuan et al, 2014 ; Jin et al, 2019 ; Gopinath et al, 2020 ). In very recent studies, pyrolysis has also been performed in the presence of hydrogen to minimize the extent of coking and the fractional yield of unsaturated compounds ( Bai et al, 2019 ). The most widely used catalysts for pyrolysis are H-ZSM-5 ( Munir et al, 2018 ), Y-Zeolite ( Anuar Sharuddin et al, 2016 ), and silica-alumina crystals held in a zeolite matrix, for the production of high yields of liquid products and catalysts are easily regenerated by steaming ( Syamsiro et al, 2014 ).…”

Section: Catalytic Processes With Transition Metals On Zeolitesmentioning

confidence: 99%

Recent Advances in Catalysis Based on Transition Metals Supported on Zeolites

et al. 2021

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This article reviews the current state and development of thermal catalytic processes using transition metals (TM) supported on zeolites (TM/Z), as well as the contribution of theoretical studies to understand the details of the catalytic processes. Structural features inherent to zeolites, and their corresponding properties such as ion exchange capacity, stable and very regular microporosity, the ability to create additional mesoporosity, as well as the potential chemical modification of their properties by isomorphic substitution of tetrahedral atoms in the crystal framework, make them unique catalyst carriers. New methods that modify zeolites, including sequential ion exchange, multiple isomorphic substitution, and the creation of hierarchically porous structures both during synthesis and in subsequent stages of post-synthetic processing, continue to be discovered. TM/Z catalysts can be applied to new processes such as CO2 capture/conversion, methane activation/conversion, selective catalytic NOx reduction (SCR-deNOx), catalytic depolymerization, biomass conversion and H2 production/storage.

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Section: Catalytic Processes With Transition Metals On Zeolitesmentioning

confidence: 99%

Recent Advances in Catalysis Based on Transition Metals Supported on Zeolites

et al. 2021

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“…It is highly flexible in treating both pure and mixed waste streams. The HTL technique is based on fast-heating-rate reactors with moderate residence times (15–20 min), temperatures (300–360 °C), pressures near to water saturation, and the use of catalysts (based on the feedstocks) [ 20 , 21 ]. Passos et al [ 21 ] demonstrated a total of 12 different commercial polymers such as acrylonitrile-butadiene-styrene (ABS), HDPE, LDPE, polyamide 6 (PA6), polyamide 6/6 (PA66), polyethylene terephthalate (PET), polycarbonate (PC), PP, PS, and polyurethane foam (PUR) using the subcritical HTL process.…”

Section: Production Of Chemicals From Plastic Wastesmentioning

confidence: 99%

Potential Chemicals from Plastic Wastes

et al. 2021

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Plastic is referred to as a “material of every application”. From the packaging and automotive industries to the medical apparatus and computer electronics sectors, plastic materials are fulfilling demands efficiently. These plastics usually end up in landfills and incinerators, creating plastic waste pollution. According to the Environmental Protection Agency (EPA), in 2015, 9.1% of the plastic materials generated in the U.S. municipal solid waste stream was recycled, 15.5% was combusted for energy, and 75.4% was sent to landfills. If we can produce high-value chemicals from plastic wastes, a range of various product portfolios can be created. This will help to transform chemical industries, especially the petrochemical and plastic sectors. In turn, we can manage plastic waste pollution, reduce the consumption of virgin petroleum, and protect human health and the environment. This review provides a description of chemicals that can be produced from different plastic wastes and the research challenges involved in plastic waste to chemical production. This review also provides a brief overview of the state-of-the-art processes to help future system designers in the plastic waste to chemicals area.

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“…Plastic as one of the most influential inventions of 20th century has been widely applied in our daily life (Andrady and Neal, 2009;Bai et al, 2019;Jie et al, 2020;Gausas et al, 2021;Zhang F et al, 2021). Currently, about 360 million tonnes (Mt) of plastic are produced each year (Martín et al, 2021), and the number is expected to double over the next 2 decades (MacArthur 2017).…”

Section: Introductionmentioning

confidence: 99%

Recent Advancements in Photocatalytic Valorization of Plastic Waste to Chemicals and Fuels

Chen¹,

Yang²,

Wang³

et al. 2021

Front. Nanotechnol.

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The continuous rise in plastic waste raises serious concerns about the ensuing effects on the pollution of global environment and loss of valuable resources. Developing efficient approach to recycle the plastic has been an urgent demand for realizing a sustainable circular economy. Photocatalytic valorization directly utilizes solar energy to transform plastic pollutant into chemicals and fuels, which is hardly implemented by traditional mechanical recycling and incineration strategies, thus offering a promising approach to address the contemporary waste and energy challenges. Here, we focus on the recent advances in the high-value utilization of plastic waste through photocatalysis. The basic principle and different reaction pathways for the photocatalytic valorization of plastic waste are presented. Then, the developed representative photocatalyst systems and converted products are elaborately discussed. At last, the review closes with critical thoughts on research challenges along with some perspectives for further development of this emerging and fascinating filed.

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Experimental investigation on liquefaction of plastic waste to oil in supercritical water

Cited by 112 publications

References 54 publications

Recent Advances in Catalysis Based on Transition Metals Supported on Zeolites

Recent Advances in Catalysis Based on Transition Metals Supported on Zeolites

Potential Chemicals from Plastic Wastes

Recent Advancements in Photocatalytic Valorization of Plastic Waste to Chemicals and Fuels

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