Deconstruction of high-density polyethylene into liquid hydrocarbon fuels and lubricants by hydrogenolysis over Ru catalyst

Jia, Chuhua; Xie, Shaoqu; Zhang, Wanli; Intan, Nadia N.; Sampath, Janani; Pfaendtner, Jim; Lin, Hongfei

doi:10.1016/j.checat.2021.04.002

Cited by 137 publications

(107 citation statements)

References 62 publications

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“…Similarly, Wang et al 58 confirmed that high H 2 pressure could accelerate the rate-limiting hydrogenation reaction and desorption rate of olefin intermediates, suppressing the further hydrogenolysis and fragmentation of small molecule products at Ru sites, thereby reducing the generation of low-value methane products. In addition, Jia et al 66 explored the catalytic performance of commercial 5%Ru/C on HDPE hydrogenolysis in n-hexane solvent under different H 2 pressures (0−6 MPa). With a high-pressure H 2 , the cracking of C−C bonds in HDPE molecules is more inclined to occur at internal positions, while the Ru/C catalyst is more favorable to cleave the terminal C−C bonds to generate methane under low-pressure H 2 (Figure 4C−E).…”

Section: Hydrogenolysismentioning

confidence: 99%

“…Using hydrogenolysis reaction as an example, introducing solvent in the reactor can significantly speed up the reaction rate. 66 In addition, coupling depolymerization reaction with other reactions to accelerate the degradation process has attracted extensive attentions. Liu et al coupled the CO 2 hydrogenation, PET methanolysis, and dimethyl terephthalate (DMT) hydrogenation for converting PET into dimethyl cyclohexanedicarboxylates.…”

Section: Conclusion and Outlooksmentioning

confidence: 99%

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Sustainable chemical upcycling of waste polyolefins by heterogeneous catalysis

Chu

Yang

et al. 2022

SusMat

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The mass production of disposable polyolefin products has led to serious plastic pollution and an imbalance between manufacturing and recycling. Given these challenges, the chemical upcycling of waste polyolefins has attracted extensive attention due to its high efficiency and economic benefits. Herein, we review the development of polyolefin chemical upcycling in heterogeneous catalysis. The status quo of polyolefin recycling is first discussed. We then introduce the advanced strategies for chemical upcycling in the view of different value‐added products and discuss their challenges and prospects. Our in‐depth analysis centers on the catalytic mechanism and the design principle of heterogeneous catalysts. Finally, we outlook the promising directions to facilitate the degradation process via polymer and catalyst design and optimized catalytic engineering. Innovative strategies are expected to promote the chemical upcycling of polyolefins, bringing great promise for the sustainable development of society.

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Section: Hydrogenolysismentioning

confidence: 99%

Section: Conclusion and Outlooksmentioning

confidence: 99%

Sustainable chemical upcycling of waste polyolefins by heterogeneous catalysis

Chu

Yang

et al. 2022

SusMat

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“…), around 90 wt% of HDPE can be converted to liquid hydrocarbons (C8-C38) within 1 h on Ru/C catalysts at 220 °C in the presence of H2 (30 bar). 888 Pt-based catalysts are another class of materials utilized in the hydrogenolysis of plastics. [889][890][891][892] Sadow and coworkers reported that PE can be converted into lubricants and waxes (Mw 200-1000 Da) over platinum supported on strontium titanate or mesoporous shell/Pt/silica at 250-300 °C in the presence of H2 (10-17 bar).…”

Section: Hydrogenolysis With Noble Metalsmentioning

confidence: 99%

Expanding Plastics Recycling Technologies: Chemical Aspects, Technology Status and Challenges

Aguirre-Villegas

Allen

et al. 2022

Preprint

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Less than 10% of the plastics generated globally are recycled, while the rest are incinerated, accumulated in landfills, or leach into the environment. New technologies are emerging to chemically recycle waste plastics that are receiving tremendous interest from academia and industry. Chemists and chemical engineers need to understand the fundamentals of these technologies to design improved systems for chemical recycling and upcycling of waste plastics. In this paper, we review the entire life cycle of plastics and options for the management of plastic waste to address barriers to industrial chemical recycling and further provide perceptions on possible opportunities with such materials. Knowledge and insights to enhance plastic recycling beyond its current scale are provided. Outstanding research problems and where researchers in the field should focus their efforts in the future are also discussed.

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“…[4] Nearly 6.3 billion metric tons of plastics have been manufactured in 2015, of which 79 % of the total product was sent to landfill, 12 % incinerated, and 9 % recycled. [5] Half of the total plastics manufactured in the European Union end up as waste every year and become the third-largest contributor to municipal solid waste (MSW) after food and paper wastes. [1,6,7] The annually generated plastic waste is expected to grow at a rate of 3.9 % per year.…”

Section: Introductionmentioning

confidence: 99%

“…As shown in Figure 1 below, the USA leads the world plastic per capita consumption with 142 Kg/year [4] . Nearly 6.3 billion metric tons of plastics have been manufactured in 2015, of which 79 % of the total product was sent to landfill, 12 % incinerated, and 9 % recycled [5] . Half of the total plastics manufactured in the European Union end up as waste every year and become the third‐largest contributor to municipal solid waste (MSW) after food and paper wastes [1,6,7] .…”

Section: Introductionmentioning

confidence: 99%

Recent Trends in the Pyrolysis of Non‐Degradable Waste Plastics

2021

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Waste plastics are non‐degradable constituents that can stay in the environment for centuries. Their large land space consumption is unsafe to humans and animals. Concomitantly, the continuous engineering of plastics, which causes depletion of petroleum, poses another problem since they are petroleum‐based materials. Therefore, energy recovering trough pyrolysis is an innovative and sustainable solution since it can be practiced without liberating toxic gases into the atmosphere. The most commonly used plastics, such as HDPE, LDPE (high‐ and low‐density polyethylene), PP (polypropylene), PS (polystyrene), and, to some extent, PC (polycarbonate), PVC (polyvinyl chloride), and PET (polyethylene terephthalate), are used for fuel oil recovery through this process. The oils which are generated from the wastes showed caloric values almost comparable with conventional fuels. The main aim of the present review is to highlight and summarize the trends of thermal and catalytic pyrolysis of waste plastic into valuable fuel products through manipulating the operational parameters that influence the quality or quantity of the recovered results. The properties and product distribution of the pyrolytic fuels and the depolymerization reaction mechanisms of each plastic and their byproduct composition are also discussed.

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Deconstruction of high-density polyethylene into liquid hydrocarbon fuels and lubricants by hydrogenolysis over Ru catalyst

Cited by 137 publications

References 62 publications

Sustainable chemical upcycling of waste polyolefins by heterogeneous catalysis

Sustainable chemical upcycling of waste polyolefins by heterogeneous catalysis

Expanding Plastics Recycling Technologies: Chemical Aspects, Technology Status and Challenges

Recent Trends in the Pyrolysis of Non‐Degradable Waste Plastics

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