Pd-modified beta zeolite for modulated hydro-cracking of low-density polyethylene into a paraffinic-rich hydrocarbon fuel

Pyra, Kamila; Tarach, Karolina A.; Śrębowata, Anna; Melián‐Cabrera, Ignacio; Góra‐Marek, Kinga

doi:10.1016/j.apcatb.2020.119070

Cited by 58 publications

(39 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, the high hydrogenation efficiency of Pd allows the doped catalyst to undergo a form of auto-regeneration, preventing the formation of coke. [202] Similar results were seen for Pd-doped hierarchical ZSM-5, where hydroprocessing of LDPE pyrolysis oil was found to yield gasoline and diesel range hydrocarbons with increased concentration of isoparaffins and aromatics and significantly reduced yield in olefins. [204]…”

Section: Doped Zeolitessupporting

confidence: 65%

“…[202] This was shown for the hydrocracking of PSW over Pd-doped βzeolite, where the products contained improved selectivity towards lighter paraffinic hydrocarbons. [202,203] This was attributed to the impact Pd had on the textural properties of βzeolite: the surface area, pore size, and pore volume were all increased by the presence of the metal. The improved properties of Pd-loaded β-zeolite increased overall cracking activity via hydrocracking while increasing paraffinic content.…”

Section: Doped Zeolitesmentioning

confidence: 92%

“…[201] Other transition metals, such as Pd, can be used to promote hydrogenation, dehydrogenation, and hydro-isomerization reactions for plastic waste conversion over zeolite catalysts. [202][203][204] Pd, with its facile ability to activate hydrogen, can provide the unique ability to promote the production of saturated hydrocarbons for fuel without the use of external hydrogen. [202] This was shown for the hydrocracking of PSW over Pd-doped βzeolite, where the products contained improved selectivity towards lighter paraffinic hydrocarbons.…”

Section: Doped Zeolitesmentioning

confidence: 99%

“…[202][203][204] Pd, with its facile ability to activate hydrogen, can provide the unique ability to promote the production of saturated hydrocarbons for fuel without the use of external hydrogen. [202] This was shown for the hydrocracking of PSW over Pd-doped βzeolite, where the products contained improved selectivity towards lighter paraffinic hydrocarbons. [202,203] This was attributed to the impact Pd had on the textural properties of βzeolite: the surface area, pore size, and pore volume were all increased by the presence of the metal.…”

Section: Doped Zeolitesmentioning

confidence: 99%

“…[202,203] The Pd metal species were found to activate an initial dehydrogenation, then protonation and skeletal isomerization or cracking over zeolitic acid sites followed. [202] The formed carbenium ions are then deprotonated and hydrogenated on the metal sites to produce saturated hydrocarbons. Furthermore, the high hydrogenation efficiency of Pd allows the doped catalyst to undergo a form of auto-regeneration, preventing the formation of coke.…”

Section: Doped Zeolitesmentioning

confidence: 99%

See 4 more Smart Citations

The Use of Heterogeneous Catalysis in the Chemical Valorization of Plastic Waste

2020

View full text Add to dashboard Cite

, respectively. Her graduate research focused on the fundamental understanding of deoxygenation mechanisms for biomass probe molecules on single crystals and thin films. During her graduate career, she received the DOE Science Graduate Student Research (SCGSR) award (2019) and conducted surface science research at Brookhaven National Lab. She now is a postdoctoral researcher at the University of Wisconsin-Madison. Her research focuses on surface spectroscopy and controlled design of heterogeneous catalysts. Melissa C. Cendejas received her B.A. (2016) in Chemistry and English from Williams College. There, she worked on the synthesis of conjugated organic molecules and phosphorusbased surfactants. She then started her PhD in Chemistry at the University of Wisconsin-Madison under the supervision of Prof. Ive Hermans. She studies active site formation on boron-based catalysts. She received the DOE Office of Science Graduate Student Research (SCGSR) award (2020) to perfrom in situ x-ray spectroscopy of catalysts at Stanford Synchrotron Radiation Lightsourse. Prof. Dr. Ive Hermans obtained his Ph.D. from KU Leuven University in Belgium in 2006. In addition to his scientific education, he also holds a postgraduate degree in Business Administration (KU Leuven, 2006). After postdoctoral research on in situ spectroscopy and reaction engineering with Prof. Alfons Baiker, he became assistant professor for heterogeneous catalysis (spring 2008) at ETH Zurich in Switzerland. January 2014, Prof. Hermans moved to the University of Wisconsin-Madison, holding a dual appointment in the Department of Chemistry and the Department of Chemical and Biological Engineering. His group focuses on the mechanistic understanding of catalytic technology using a variety of techniques.

show abstract

Section: Doped Zeolitessupporting

confidence: 65%

Section: Doped Zeolitesmentioning

confidence: 92%

Section: Doped Zeolitesmentioning

confidence: 99%

Section: Doped Zeolitesmentioning

confidence: 99%

Section: Doped Zeolitesmentioning

confidence: 99%

See 3 more Smart Citations

The Use of Heterogeneous Catalysis in the Chemical Valorization of Plastic Waste

2020

View full text Add to dashboard Cite

show abstract

A High‐Throughput Approach to Repurposing Olefin Polymerization Catalysts for Polymer Upcycling

et al. 2022

View full text Add to dashboard Cite

Efficient and economical plastic waste upcycling relies on the development of catalysts capable of polymer degradation. A systematic high-throughput screening of twenty-eight polymerization catalyst precursors, belonging to the catalyst families of metallocenes, ansa-metallocenes, and hemi-and post-metallocenes, in cis-1,4-polybutadiene (PB) degradation reveals, for the first time, important structure-activity correlations. The upcycling conditions involve activation of the catalysts (at 0.18 % catalyst loading) with tri-isobutyl aluminum at 50 °C in toluene. The data indicate the ability to degrade PB is a general reactivity profile of neutral group 4 metal hydrides. A simple quantitative-structure activity relationship (QSAR) model utilizing two descriptors for the distribution of steric bulk in the active pocket and one measuring the metal ion electrophilicity reveals the degradation ability improves with increased but not overbearing steric congestion and lower electrophilicity.

show abstract

A High‐Throughput Approach to Repurposing Olefin Polymerization Catalysts for Polymer Upcycling

et al. 2022

View full text Add to dashboard Cite

show abstract

Pd-modified beta zeolite for modulated hydro-cracking of low-density polyethylene into a paraffinic-rich hydrocarbon fuel

Cited by 58 publications

References 44 publications

The Use of Heterogeneous Catalysis in the Chemical Valorization of Plastic Waste

The Use of Heterogeneous Catalysis in the Chemical Valorization of Plastic Waste

A High‐Throughput Approach to Repurposing Olefin Polymerization Catalysts for Polymer Upcycling

A High‐Throughput Approach to Repurposing Olefin Polymerization Catalysts for Polymer Upcycling

Contact Info

Product

Resources

About