Optimization of pyrolysis conditions of polyurethane for recycling of solid products

Im, Eun Jung; Kim, Sung Hyun; Lee, Kyong Hwan

doi:10.1016/j.jaap.2008.03.008

Cited by 12 publications

(4 citation statements)

References 16 publications

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“…To reduce the production of volatile char-N (nitrogen bound to char matrix), ferric trichloride is used (Guo et al, 2016) as it can create NOx. During studies, it was observed that solid char yield was optimized at 300°C and 12°C/min (Im et al, 2008). Also, for the secondary reactions PU char and activated-carbon is recommended to be used as a promoter (Takamoto and Petrich, 1994).…”

Section: Thermo-chemical Processingmentioning

confidence: 99%

Review on disposal, recycling and management of waste polyurethane foams: A way ahead

et al. 2023

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With the burning issue of air, land and water pollution, the premonition of looking forward towards a future devoid of any kind of oil and gas reserves has caused a paradigm shift towards recycling, recovery of any synthetic polymer and also to dispose them off environmentally. Among them are plastics such as polyethylene terephthalate and poly vinyl chloride. Polyurethane (PU) is also under the scanner to dispose of or recycle it environmentally and sustainably. PU is at present the sixth most utilized polymer all over the world with a production of nearly 18 million tonnes per annum, which roughly estimates a daily production of PU products of greater than a million of cubic metres. Its thermostable nature is one of the major reasons for its higher preference over other polymers. This review article discusses the current disposal and technologies available to recycle waste PU foams and also sheds some light on some additional work being done in the field to upgrade the existing technology. Interestingly, some methods mentioned here are probably undergoing scale-up trials runs by now. Currently, the most researched and studied ones are mechanical recycling and glycolysis. But microbial and enzymatic disposal methods can be turned into full-scale industrial recycling processes in the near future. Additionally, we can see an archetypal shift from traditional oil-based sources to the agrarian sources.

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Section: Thermo-chemical Processingmentioning

confidence: 99%

Review on disposal, recycling and management of waste polyurethane foams: A way ahead

et al. 2023

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“…Having reviewed a number of papers, the similarity of pyrolysis behavior is evident at low temperatures between RDF and wood pellets (cellulosic material being present in both), but with apparent distinctions at higher temperatures [1,24,40,55], where analysis shows that the burnt samples heated to temperatures of 350 • C and beyond generate volatile gases from the fuel along with a softening and clustering of the RDF pellets.…”

Section: Rdf Explosionsmentioning

confidence: 99%

RDF Fire and Explosion Hazards at Power Plants

Januszewski

Brzezińska

2021

Sustainability

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In the last 30 years Refuse Derived Fuel (RDF) has grown in popularity due to its perception as a readily available, renewable and sustainable fuel for power stations. This increased use of RDF has been closely followed by an escalation of industrial fire and explosion-related incidents associated with this fuel, showing the new hazards and inherent dangers brought by it. The re-evaluation of specific fire and explosion protective measures is required. For RDF to have a continued role as an energy source in a volatile and difficult energy market, it must be perceived as: sustainable; safe; easy; cheap; and reliable. If financial losses due to business interruption occur frequently, then confidence in this area will dissolve, and while safety is paramount to prevent injury and/or death, reputational damage must also be considered to secure energy supply and maintain market confidence in RDF. This paper presents a review of previous investigations and scientific studies, which, combined with the authors’ own RDF fire and explosion investigatory experience, allows for a logical hypothesis to be made in relation to relative practices in storage and fuel route fire safety management.

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“…Under the optimum conditions, the iodine number and the yield of solid product were estimated to be 582 mg/g and 15 g, respectively. 10 El-Shekeil et al employed Taguchi L 9 OA to optimize the processing parameters of thermoplastic polyurethane reinforced with cocoa pod husk fibers, and the ultimate tensile strength was considered as the response. 11 Zavala et al performed the optimization of polyurethane production in a semi-batch reactor.…”

Section: Introductionmentioning

confidence: 99%

Practice of Taguchi design of experiments in the valuation of mechanical behavior of rigid polyurethane foam composites

Kaur

Kumar

2021

Polymers and Polymer Composites

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In the present study, Taguchi design of experiments (DOEs) L18 orthogonal array has been used for the investigation of the mechanical behavior of rigid polyurethane foam (RPUF) composites. The outcome of the process parameters such as polyol, filler, surfactant, catalyst, blowing agent, and anti-flaming agent on the mechanical properties, such as tensile, flexural, and compressive strengths and hardness (Shore D) of RPUF composites, has been examined, and the resulted data were analyzed by means of Taguchi design of experiments. The raw data for the average values of the mechanical properties and the signal-to-noise (S/N) ratio for each parameter were evaluated at three levels, and the analysis of variance (ANOVA) and optimum process parameters are determined. The confirmation experiments were performed for the validation of the improved performance and to measure the contribution of individual parameter on the responses. The confirmation experiments revealed the average tensile strength, average compressive strength, average flexural strength, and average hardness (Shore D) as 5.24 MPa, 6.37 MPa, 12.28 MPa, and 72.43, respectively, which fall within the 95% confidence interval of the anticipated optimum process parameters.

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Optimization of pyrolysis conditions of polyurethane for recycling of solid products

Cited by 12 publications

References 16 publications

Review on disposal, recycling and management of waste polyurethane foams: A way ahead

Review on disposal, recycling and management of waste polyurethane foams: A way ahead

RDF Fire and Explosion Hazards at Power Plants

Practice of Taguchi design of experiments in the valuation of mechanical behavior of rigid polyurethane foam composites

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