Microwave-driven upcycling of single-use plastics using zeolite catalyst

Wang, Yuxin; Biddle, Tara; Jiang, Changle; Luong, Thang M.; Chen, Roujia; Brown, Sean; Jie, Xiangyu; Hu, Jianli

doi:10.1016/j.cej.2023.142918

Cited by 15 publications

(1 citation statement)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Microwave (MW) heating has been widely utilized in various applications such as domestic, communications, and industrial means. , In material processing methods, MW technology is utilized due to its high efficiency and volumetric heating characteristic in comparison to conventional thermal heating. − The advantage of MW comes from the selective heating feature where MW irradiation penetrates the sample and creates hotspots. − Since MW is a form of non-contact heating, process startup and shutdown can be quite rapid. Typically, some species in the sample can be targeted for heating, while at other regions, the temperature can remain milder resulting in a temperature gradient that can be beneficial to the reaction.…”

Section: Introductionmentioning

confidence: 99%

Microwave Catalytic Co-Upcycling of Polyethylene and Polystyrene

Luong,

Luo,

Robinson

et al. 2024

ACS Sustainable Resour. Manage.

Self Cite

View full text Add to dashboard Cite

Microwave-assisted catalytic upcycling plastic wastes into valuable chemicals is a promising technology to treat plastic wastes. In this study, the catalytic upcycling of low-density polyethylene (LDPE), polystyrene (PS), and their mixture under microwave (MW) irradiation was explored. In comparison to conventional thermal conditions, MW heating produced significantly more BTX and achieved better conversion due to the "hotspots" formation over a catalyst. MW irradiation also lowered the activation energy for the catalytic pyrolysis of pure and mixed plastics. For mixed plastics, the E a was reduced to 20.3 kJ/mol at MW conditions compared to 38.3 kJ/mol in conventional thermal heating. The synergistic mechanism between LDPE and PS for BTX production was proposed, in which aromatization occurred within the HZSM-5 channel and the presence of LDPE inhibited coking while PS provided the backbone for BTX formation.

show abstract

Section: Introductionmentioning

confidence: 99%

Microwave Catalytic Co-Upcycling of Polyethylene and Polystyrene

Luong,

Luo,

Robinson

et al. 2024

ACS Sustainable Resour. Manage.

Self Cite

View full text Add to dashboard Cite

show abstract

Microwave‐Assisted Pyrolysis‐A New Way for the Sustainable Recycling and Upgrading of Plastic and Biomass: A Review

Jiang,

Liang,

Guo

et al. 2024

ChemSusChem

View full text Add to dashboard Cite

The efficient utilization of organic solid waste resources can help reducing the consumption of conventional fossil fuels, mitigating environmental pollution, and achieving green sustainable development. Due to its dual nature of being both a resource and a source of pollution, it is crucial to implement suitable recycling technologies throughout the recycling and upgrading processes for plastics and biomass, which are organic solid wastes with complex mixture of components. The conventional pyrolysis and hydropyrolysis were summarized for recycling plastics and biomass into highvalue fuels, chemicals, and materials. To enhance reaction efficiency and improve product selectivity, microwave‐assisted pyrolysis was introduced to the upgrading of plastics and biomass through efficient energy supply especially with the aid of catalysts and microwave absorbers. This review provides a detail summary of microwave‐assisted pyrolysis for plastics and biomass from the technical, applied, and mechanistic perspectives. Based on the recent technological advances, the future directions for the development of microwave‐assisted pyrolysis technologies are predicted.

show abstract