Enhanced production of hydrocarbons from the catalytic pyrolysis of maize straw over hierarchical ZSM-11 zeolites

Wu, Lei; Xin, Junjie; Xia, Dan; Sun, Junliang; Liang, Jie

doi:10.1016/j.apcatb.2022.121775

Cited by 26 publications

(3 citation statements)

References 49 publications

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“…This result further revealed the key role of TPA + in directing the formation of the zeolite nuclei and thus promoting the crystallization of the pure silica MFI zeolite. Furthermore, parallel conclusions were also derived from the preparation of other typical zeolites such as Beta, ZSM-11, and SSZ-13, which commonly employed the tetraethylammonium cations (TEA + ), tetrbuthylammonium cations (TBA + ), and 1-adamantyltrimethylammonium cations (TMAda + ) as the OSDAs. ,, However, due to the limited functions of the OSDAs, it was challenging to intelligently quicken the induction nucleation of zeolites merely by increasing the quantity of the OSDAs. In order to overcome these troubles, plenty of pioneer works that introduced the prefabricated parent zeolites into the starting gels as seeds to promote the crystallization of zeolites had been developed. ,, The earliest example that added seeds to accelerate the crystallization rate of zeolites could be dated back to before 1989, when R. D. Edelman and his collogues ascertained that seeds played important roles in a zeolite crystallization. , Afterward, the seeds were used as conventional additives to manipulate the zeolite crystallization process on a large scale, and thus the morphologies, sizes, distributions of aluminum within the frameworks, Si/Al, and ratio of the zeolites were imperceptibly regulated. − …”

Section: Chemical Methodsmentioning

confidence: 99%

“…Furthermore, parallel conclusions were also derived from the preparation of other typical zeolites such as Beta, ZSM-11, and SSZ-13, which commonly employed the tetraethylammonium cations (TEA + ), tetrbuthylammonium cations (TBA + ), and 1-adamantyltrimethylammonium cations (TMAda + ) as the OSDAs. 48,63,64 However, due to the limited functions of the OSDAs, it was challenging to intelligently quicken the induction nucleation of zeolites merely by increasing the quantity of the OSDAs. In order to overcome these troubles, plenty of pioneer works that introduced the prefabricated parent zeolites into the starting gels as seeds to promote the crystallization of zeolites had been developed.…”

Section: Modulating the Compositions Of The Starting Gelsmentioning

confidence: 99%

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Acceleration of Zeolite Crystallization: Current Status, Mechanisms, and Perspectives

Yuan,

Han,

Deng

et al. 2024

ACS Appl. Mater. Interfaces

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Zeolites are important classes of crystalline materials and possess well-defined channels and cages with molecular dimensions. They have been extensively employed as heterogeneous catalysts and gas adsorbents due to their relatively large specific surface areas, high pore volumes, compositional flexibility, definite acidity, and hydrothermal stability. The zeolite synthesis normally undergoes high-temperature hydrothermal treatments with a relatively long crystallization time, which exhibits low synthesis efficiency and high energy consumption. Various strategies, e.g., modulation of the synthesis gel compositions, employment of special silica/aluminum sources, addition of seeds, fluoride, hydroxyl (·OH) free radical initiators, and organic additives, regulation of the crystallization conditions, development of new approaches, etc., have been developed to overcome these obstacles. And, these achievements make prominent contributions to the topic of acceleration of the zeolite crystallization and promote the fundamental understanding of the zeolite formation mechanism. However, there is a lack of the comprehensive summary and analysis on them. Herein, we provide an overview of the recent achievements, highlight the significant progress in the past decades on the developments of novel and remarkable strategies to accelerate the crystallization of zeolites, and basically divide them into three main types, i.e., chemical methods, physical methods, and the derived new approaches. The principles/acceleration mechanisms, effectiveness, versatility, and degree of reality for the corresponding approaches are thoroughly discussed and summarized. Finally, the rational design of the prospective strategies for the fast synthesis of zeolites is commented on and envisioned. The information gathered here is expected to provide solid guidance for developing a more effective route to improve the zeolite crystallization and obtain the functional zeolite-based materials with more shortened durations and lowered cost and further promote their applications.

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Section: Chemical Methodsmentioning

confidence: 99%

Section: Modulating the Compositions Of The Starting Gelsmentioning

confidence: 99%

Acceleration of Zeolite Crystallization: Current Status, Mechanisms, and Perspectives

Yuan,

Han,

Deng

et al. 2024

ACS Appl. Mater. Interfaces

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“…Gajera B et al examined the pyrolysis characteristics of pretreated straw in an inert gas environment [12], while Wang et al explored the synergistic effects of co-pyrolyzing different straws and waste tires in a nitrogen gas environment [13]. External factors that have been studied include, but are not limited to, the catalytic pathway [14], the size of biomass particles [15], the gaseous environment in which pyrolysis occurs [16], and the co-pyrolysis of multiple materials [17].…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis Behavior and Kinetics of Typical Crop Straw in Henan Province at Different Heating Rates

Hu,

Hou,

Lan

et al. 2023

Processes

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Straw, which is characterized by its low cost, large quantity, and rich supply of biomass energy, is often converted into energy that can be utilized in industrial production through pyrolysis technology. This paper examines the pyrolysis experiments of four kinds of straw (rice, wheat, peanut, and corn) from the Henan Province of China, conducted in an air environment with varying temperature-rise rates. Based on the experimental results, an analysis was conducted on the effect of the rate of temperature rise on the degree of straw pyrolysis and the pyrolysis characteristics of each type of straw. The activation energies of the pyrolysis reactions were calculated utilizing the Kissinger–Akahira–Sunose (KAS), Flynn–Wall–Ozawa (FWO), and Starink methods. It was concluded that the pyrolysis process of all four types of straw could roughly be classified into three stages: dehydration and drying stage, volatile release stage, and carbonization stage. Among the four types of straw evaluated, rice straw exhibited the most favorable combustion performance, while wheat straw demonstrated the best pyrolysis effect. Increasing the heating rate resulted in a pronounced thermal hysteresis effect during the straw’s pyrolysis, as evidenced by the TG and DTG curves shifting toward higher temperatures. The reaction speed increased as the heating rate increased, and the amount of residual carbon displayed an upward trend.

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High‐Spin States of Manganese(III) Enable Robust Cold‐Adapted Activity of MnO₂ Nanozymes

Tian,

Huangfu,

Kang

et al. 2024

Advanced Science

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Developing novel cold‐adapted nanozymes and elucidating their mechanisms of action remains a great challenge. Inspired by natural oxidases that utilize high‐spin and high‐valent metal‐oxygen intermediates to achieve high efficiency at low temperatures, in this study, a series of MnOx nanomaterials with varied valence and spin states are synthesized. The activity assay revealed that the oxygen vacancy‐engineered ε‐MnO2 nanozyme displayed excellent cold‐adapted oxidase‐like properties, and no observable activity loss is observed in the temperature range of −20 to 45 °C. The superior performance is attributed to the high‐spin Mn(III)–O species coupled with its induced Jahn–Teller effect, which facilitates the dissociation and activation of oxygen at low temperatures. As a proof of concept, an excellent cold‐adapted δ‐MnO2 nanozyme can be obtained using Mn3O4 as the precursor by regulating the spin state of Mn(III). Moreover, a novel and effective degradation strategy for corn stalk at low temperature is built based on the robust cold‐adapted oxidase‐like activity of ε‐MnO2. These results not only provide new insights for the rational design of cold‐adapted nanozymes but also broaden the application of nanozymes in low‐temperature industrial processes.

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Enhanced production of hydrocarbons from the catalytic pyrolysis of maize straw over hierarchical ZSM-11 zeolites

Cited by 26 publications

References 49 publications

Acceleration of Zeolite Crystallization: Current Status, Mechanisms, and Perspectives

Acceleration of Zeolite Crystallization: Current Status, Mechanisms, and Perspectives

Pyrolysis Behavior and Kinetics of Typical Crop Straw in Henan Province at Different Heating Rates

High‐Spin States of Manganese(III) Enable Robust Cold‐Adapted Activity of MnO₂ Nanozymes

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Enhanced production of hydrocarbons from the catalytic pyrolysis of maize straw over hierarchical ZSM-11 zeolites

Cited by 26 publications

References 49 publications

Acceleration of Zeolite Crystallization: Current Status, Mechanisms, and Perspectives

Acceleration of Zeolite Crystallization: Current Status, Mechanisms, and Perspectives

Pyrolysis Behavior and Kinetics of Typical Crop Straw in Henan Province at Different Heating Rates

High‐Spin States of Manganese(III) Enable Robust Cold‐Adapted Activity of MnO2 Nanozymes

Contact Info

Product

Resources

About

High‐Spin States of Manganese(III) Enable Robust Cold‐Adapted Activity of MnO₂ Nanozymes