Valorisation of different waste plastics by pyrolysis and in-line catalytic steam reforming for hydrogen production

Barbarias, Itsaso; López, Gartzen; Artetxe, Maite; Arregi, Aitor; Bilbao, Javier; Olazar, Martı́n

doi:10.1016/j.enconman.2017.11.048

Cited by 162 publications

(97 citation statements)

References 45 publications

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“…The main reactor configurations developed in the literature for H2 production from hydrocarbons (such as plastic wastes) and oxygenates (such as biomass-derived compounds) should be classified into two main strategies [26,95]: (i) off-line reforming or (ii) pyrolysis with in-line (sequenced) reforming.…”

Section: Reactor Configurationsmentioning

confidence: 99%

“…In this regard, some authors observed by TEM that the coke deposited on Ni catalysts in the H2 production by in-line pyrolysis-reforming of several plastic feedstock (HDPE, LDPE, PP) comprises both amorphous (or encapsulating) and filamentous coke, the former being presumably favored by the olefinic nature of the stream entering into the reforming step [6,7,95,160,241]. Some of these authors aimed a co-production of H2 and filamentous coke in the form of CNTs due to their commercial interest.…”

Section: Figure 12mentioning

confidence: 99%

See 1 more Smart Citation

Coke formation and deactivation during catalytic reforming of biomass and waste pyrolysis products: A review

Ochoa

Bilbao

Gayubo

et al. 2020

Renewable and Sustainable Energy Reviews

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346

158

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Section: Reactor Configurationsmentioning

confidence: 99%

Section: Figure 12mentioning

confidence: 99%

Coke formation and deactivation during catalytic reforming of biomass and waste pyrolysis products: A review

Ochoa

Bilbao

Gayubo

et al. 2020

Renewable and Sustainable Energy Reviews

Self Cite

346

158

View full text Add to dashboard Cite

“…Moreover, below this temperature the plastic pyrolysis kinetic is very slow. Although the polymer degradation in the pyrolysis-reforming process occurs under steam atmosphere, the results obtained in previous studies using steam are very similar to those obtained using nitrogen as fluidizing agent, and therefore steam has hardly any effect at this temperature [33,35]. This result is associated with the mild pyrolysis conditions used, 500°C, which hinders steam reactivity.…”

Section: Waste Plastics Pyrolysis In Conical Spouted Bedsmentioning

confidence: 63%

“…However, the fixed bed reactor led to an excessive coke formation and severe operational problems subsequent to some minutes operation. Accordingly, the fixed bed reactor was replaced by a fluidized bed reactor in subsequent studies to overcome the mentioned problems [33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Waste Plastics Valorization by Fast Pyrolysis and in Line Catalytic Steam Reforming for Hydrogen Production

Barbarias¹,

Arregi²,

Artetxe³

et al. 2020

Recent Advances in Pyrolysis

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This chapter summarizes the most recent results obtained in the plastic waste pyrolysis-reforming strategy for hydrogen production. An original two-reactor configuration consisting of a conical spouted bed reactor for the pyrolysis step and a fluidized bed reactor for the pyrolysis volatile reforming is proposed. The fundamental aspects and challenges of this joint process are discussed in detail, and the prospects for the full-scale implementation of this valorization route are assessed. Thus, the influence the main reforming parameters (temperature, space time and steam/ plastic ratio) have in the pyrolysis-reforming of HDPE on product yields and catalyst stability are reported. Moreover, the role played by plastic composition on process performance is also described by studying the influence of following polymers: high density polyethylene (HDPE), polypropylene (PP), polyethylene terephthalate (PET) and polystyrene (PS). The operating conditions used for the valorization of different plastics have been as follows: pyrolysis temperature of 500°C, reforming temperature of 700°C, space time of 16.7 g catalyst min g plastic −1 and steam/plastic ratio of 4.

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“…A study was of 45 conducted to assess the hydrogen production from different plastics (polypropylene, polyethylene, polyethylene terephthalate and polystyrene) in a two-step reaction system (pyrolysis and in-line reforming). The deactivation rate was dependent on feed stock, and it was faster in the case of polystyrene and polyethylene terephthalate than those observed for the polyolefins and the plastic mixture [268].…”

Section: Catalyst Deactivation In Polymer Pyrolysismentioning

confidence: 73%

Catalytic Pyrolysis of Biomass and Polymer Wastes

et al. 2018

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Oil produced by the pyrolysis of biomass and co-pyrolysis of biomass with waste synthetic polymers has significant potential as a substitute for fossil fuels. However, the relatively poor properties found in pyrolysis oil—such as high oxygen content, low caloric value, and physicochemical instability—hampers its practical utilization as a commercial petroleum fuel replacement or additive. This review focuses on pyrolysis catalyst design, impact of using real waste feedstocks, catalyst deactivation and regeneration, and optimization of product distributions to support the production of high value-added products. Co-pyrolysis of two or more feedstock materials is shown to increase oil yield, caloric value, and aromatic hydrocarbon content. In addition, the co-pyrolysis of biomass and polymer waste can contribute to a reduction in production costs, expand waste disposal options, and reduce environmental impacts. Several promising options for catalytic pyrolysis to become industrially viable are also discussed.

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Valorisation of different waste plastics by pyrolysis and in-line catalytic steam reforming for hydrogen production

Cited by 162 publications

References 45 publications

Coke formation and deactivation during catalytic reforming of biomass and waste pyrolysis products: A review

Coke formation and deactivation during catalytic reforming of biomass and waste pyrolysis products: A review

Waste Plastics Valorization by Fast Pyrolysis and in Line Catalytic Steam Reforming for Hydrogen Production

Catalytic Pyrolysis of Biomass and Polymer Wastes

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