Catalytic fast co-pyrolysis of waste greenhouse plastic films and rice husk using hierarchical micro-mesoporous composite molecular sieve

Li, Zhaoying; Zhong, Zhaoping; Zhang, Bo; Wang, Wei; Seufitelli, Gabriel V.S.; Resende, Fernando L.P.

doi:10.1016/j.wasman.2019.11.012

Cited by 64 publications

(18 citation statements)

References 44 publications

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“…[122] In addition, the mesoporous nature allows the deposition of highly dispersed metals or metal oxides to create of multifunctional catalysts with enhanced activity. [122,123,[210][211][212][213][214][215][216][217] Compared to the microporous zeolite, hierarchical zeolites have improved cracking activity, rendering higher yield of C 2 À C 5 hydrocarbons and delayed deactivation as a result of the secondary porosity. [122] For example, hierarchical ZSM-23 were found to have higher conversion efficiency and lower operating temperature for UHMWPE degradation as compared to unmodified ZSM-23 due to secondary porosity and improved external surface area and acidity.…”

Section: Hierarchical and Core-shell Catalystsmentioning

confidence: 99%

“…[210] There exist numerous synthesis techniques to create hierarchical porous structures and each yield catalytically different materials due to accessibility to active sites and strength of acid sites. [122,123,[210][211][212][213][214][215][216][217] For example, two different hierarchical βzeolite catalysts have been investigated for the cracking of HDPE in a recent study. [123] The two catalysts differed in the mesopore generation synthesis technique where one utilized cetyltrimethylammonium cations (CTAB + ) to reorganize zeolitic nanounits around the CTAB micelles while the other functionalized the nanounits with an organosilane.…”

Section: Hierarchical and Core-shell Catalystsmentioning

confidence: 99%

“…Such catalysts have faster intracrystalline diffusion, lower steric hindrances for the conversion of bulky compounds, and higher resistance to coke deposition compared to typical microporous zeolites [122] . In addition, the mesoporous nature allows the deposition of highly dispersed metals or metal oxides to create of multifunctional catalysts with enhanced activity [122,123,210–217] . Compared to the microporous zeolite, hierarchical zeolites have improved cracking activity, rendering higher yield of C 2 −C 5 hydrocarbons and delayed deactivation as a result of the secondary porosity [122] .…”

Section: Heterogeneous Catalystsmentioning

confidence: 99%

“…For example, hierarchical ZSM‐23 were found to have higher conversion efficiency and lower operating temperature for UHMWPE degradation as compared to unmodified ZSM‐23 due to secondary porosity and improved external surface area and acidity [210] . There exist numerous synthesis techniques to create hierarchical porous structures and each yield catalytically different materials due to accessibility to active sites and strength of acid sites [122,123,210–217] . For example, two different hierarchical β‐zeolite catalysts have been investigated for the cracking of HDPE in a recent study [123] .…”

Section: Heterogeneous Catalystsmentioning

confidence: 99%

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

2020

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, 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.

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Section: Hierarchical and Core-shell Catalystsmentioning

confidence: 99%

Section: Hierarchical and Core-shell Catalystsmentioning

confidence: 99%

Section: Heterogeneous Catalystsmentioning

confidence: 99%

Section: Heterogeneous Catalystsmentioning

confidence: 99%

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

2020

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“…14). Using a hierarchical HZSM-5/MCM-41 catalyst, Li et al (2020) assessed the synergetic effects between two feedstocks (rice husk and waste greenhouse plastic films) in the CFP. They showed that the maximum hydrocarbon yield of 71.1% was achieved at 600 °C using the mass ratio of rice husk to waste greenhouse plastic films of 1:1. microwave absorbent increased the yields of aromatics and olefins remarkably.…”

Section: Hybridmentioning

confidence: 99%

A review on the role of hierarchical zeolites in the production of transportation fuels through catalytic fast pyrolysis of biomass

2020

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Design of highly active catalysts plays a critical role in catalytic fast pyrolysis (CFP) of lignocellulosic biomass. Advanced catalysts can improve the deoxygenation rate of pyrolysis vapors and boost the production of fuel precursors. Zeolites are suitable frameworks for catalyzing pyrolysis vapors into species of transportation fuel value. However, their nano-sized structure limits the diffusion of reactants into pores and over active sites. Consequently, the aggregation of large molecules outside micropores leads to a massive coke formation, blocking pore channels, and thus, preventing the accessibility to acid sites. This could cause quick deactivation and instability of the catalyst, necessitating frequent catalyst regeneration and replenishment. Hierarchical micro/mesopore-structured zeolites are promising candidates to cope with the mentioned challenges. In addition to their adjusted pore structure and increased accessibility of acid sites, the formation of mesoporosity in zeolites provides an adequate room for the deposition of additional active phases such as metal nanoparticles, further boosting the catalytic activity. Different strategies used for preparing hierarchical zeolites can tremendously alter their attributes, and consequently affect product selectivity during CFP of biomass. Focusing on the precursors of transportation fuels (i.e., aromatic hydrocarbons and olefins), the present paper critically reviews the impacts of methods used for synthesizing hierarchical zeolite, on CFP of bio-based feedstocks. Moreover, the role of metal addition to hierarchical zeolites in biomass catalytic pyrolysis is also discussed briefly. Among the different synthesis techniques, desilication treatment using alkaline solutions is the most promising owing to its simplicity, high productivity, and scalability. In terms of product selectivity, the addition of Ga species to hierarchical zeolites can increase aromatic hydrocarbons while Ce incorporation can increase the yield of valuable oxygenates such as furan. Despite the advantages of mono-metallic hierarchical zeolites in producing cherished chemicals, future studies should scrutinize the influence of bi-metallic hierarchical zeolites in bio-based CFP processes.

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Catalytic co‐pyrolysis of macroalgal components with lignocellulosic biomass for enhanced biofuels and high‐valued chemicals

Uzoejinwa

Cao

Wang

et al. 2021

Intl J of Energy Research

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This study focuses on catalytic co-pyrolysis of a lignocellulosic biomass (rice husk) and main components of the seaweed Enteromorpha clathrata (ie, protein, polysaccharide, and ash) using TGA and Py-GC/MS analytical techniques with the aim and novelty to unveil their catalytic co-pyrolysis thermal behaviors and synergistic effect of interactions between their catalytic co-pyrolysis volatiles for enhanced biofuels and high-valued chemicals production. Thus, in this study, rice husk was treated with macroalgal major components over ZSM-5, MCM-41, and blend of both catalysts using the Py-GC/MS analytical technique to improve the quality of rice husk bio-oil. Thermogravimetric analysis studies of pyrolysis, co-pyrolysis, and catalytic co-pyrolysis of lignocellulosic biomass with seaweed main components were also performed. Effects of HZSM-5, MCM-41, and blend of both catalysts on catalytic co-pyrolysis products distributions were also studied and compared. Results revealed that the quality and chemical compositions of rice husk bio-oil were significantly improved owing to the synergistic effect of interactions between volatiles of rice husk and seaweed main components during catalytic co-pyrolysis. Also, catalytic co-pyrolysis of macroalgal components and lignocellulosic biomass with ZSM-5, MCM-41, and blends of both catalysts were found to considerably reduce the oxygenated compounds, and greatly improved selectivity of monocyclic aromatic hydrocarbons in the bio-oil. However, MCM-41 offered a stronger positive upgrading effect than ZSM-5 catalyst. This could be attributed to its greater ability in raising the selectivity of aromatic hydrocarbons and reduction of activation energies of the degradation reactions. It was also observed that blends of both catalysts offered a higher upgrading effect than ZSM-5 and MCM-41 catalysts alone. Novelty Statement• Catalytic c-pyrolysis of macroalgal components and lignocellulosic biomass with ZSM-5, MCM-41, and blends of these catalysts greatly improved selectivity of monocyclic aromatic hydrocarbons in the bio-oil.Benjamin Bernard Uzoejinwa and Bin Caocontributed equally to this study.

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Catalytic fast co-pyrolysis of waste greenhouse plastic films and rice husk using hierarchical micro-mesoporous composite molecular sieve

Cited by 64 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 review on the role of hierarchical zeolites in the production of transportation fuels through catalytic fast pyrolysis of biomass

Catalytic co‐pyrolysis of macroalgal components with lignocellulosic biomass for enhanced biofuels and high‐valued chemicals

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