Co-pyrolysis of biomass and soapstock in a downdraft reactor using a novel ZSM-5/SiC composite catalyst

Jiang, Lin; Wang, Yunpu; Dai, Leilei; Yu, Zhenting; Yang, Qi; Yang, Sha; Jiang, Deyu; Ma, Zhiyun; Wu, Qiuhao; Zhang, Bo; Liu, Yuhuan; Ruan, Roger

doi:10.1016/j.biortech.2019.01.119

Cited by 26 publications

(7 citation statements)

References 34 publications

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“…Microwave-assisted copyrolysis has been performed on a variety of copyrolysis raw materials, such as biomass and lignite, biomass and plastics, biomass and soapstock, etc. ,, An et al found that microwave-assisted copyrolysis of biomass and lignite can produce more liquid oil and pyrolytic gas, because of the synergetic effect of biomass and lignite. Suriapparao et al reported that the bio-oil from the microwave-assisted copyrolysis of several types of biomass with polypropylene and polystyrene had lower water content and superior HHV, which could reach 38–42 MJ kg –1 .…”

Section: Other Pyrolysis Methodsmentioning

confidence: 99%

A Review of Recent Advances in Biomass Pyrolysis

et al. 2020

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Pyrolysis has created many (and will open more) possibilities for high-value utilization of biomass. To obtain the optimal amount of desired pyrolysis products, especially high-quality bio-oil, a great deal of effort has been conducted in both academia in the past few decades, to clarify fundamental mechanisms of biomass pyrolysis and design efficient relevant technical processes. This paper comprehensively reviews recent advances in both fundamental studies and technology applications of biomass pyrolysis. First, pyrolysis mechanisms of real biomass and its major components, the reactor-scale simulation of biomass pyrolysis, and applications of pyrolysis products are discussed. Then, according to the requirements imposed to improve the physicochemical properties of respective pyrolysis products, relevant optimization and regulation methods for biomass pyrolysis process are reviewed. Previous research has indicated that biomass copyrolysis with other feedstock can not only enhance physicochemical properties of pyrolysis products but also effectively realize recycling of wastes. Thus, an in-depth discussion of recent advances in biomass copyrolysis with four different feedstocks (i.e., coal, plastics, tires, and sludge) is covered in this Review. As an indispensable component of general biomass pyrolysis, recent activities of catalytic biomass pyrolysis are also summarized, including new catalytic pyrolysis processes such as catalytic hydropyrolysis and catalytic copyrolysis. Besides, two novel heating approaches (microwave heating and solar heating) for biomass pyrolysis are described, and their features are compared with the conventional heating method. Finally, this Review is concluded with perspectives for future directions of biomass pyrolysis.

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Section: Other Pyrolysis Methodsmentioning

confidence: 99%

A Review of Recent Advances in Biomass Pyrolysis

et al. 2020

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“…This configuration has some drawbacks, such as the pyrolysis temperature, which cannot be optimized for catalyst activation, and the possibility of some vapors not entering into the catalyst pores before attaining the reaction temperature [25]. In addition, high coke can be produced on the catalyst, decreasing both bio-oil yields and quality [26]. As expected, the catalysts decrease the activation energy, and then, the pyrolysis temperature, providing more favorable energetic reaction pathways [35].…”

Section: Catalytic Pyrolysis Of Biomassmentioning

confidence: 94%

Selecting Catalysts for Pyrolysis of Lignocellulosic Biomass

Rangel

Mayer

Carvalho

et al. 2023

Biomass

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The pyrolysis of lignocellulosic biomass is a promising technology for obtaining renewable chemicals and fuels to replace fossil-based products. However, due to the complexity of the lignin, cellulose and hemicellulose molecules, a large variety of compounds are often formed, making commercial implementation difficult. The use of a catalyst during reactions has been recognized as one of the major improvements in pyrolysis, allowing the production of selected compounds. Moreover, the large number of available catalysts opens up a wide range of possibilities for controlling the reaction network. Zeolites, hierarchical zeolites, alkali and alkaline earth oxides, transition metals and carbonaceous materials, among others, have been investigated in the pyrolysis of a variety of biomasses. In addition, bifunctional catalysts play a role in pyrolysis, as well as the addition of plastics as hydrogen donors. This review aims to present and discuss in detail state-of-the-art catalytic pyrolysis, focusing on the relationships between the properties of the catalysts and the obtained products. A guideline for selecting catalysts for lignocellulosic biomass is also provided.

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“…As far as bio-oils direct use in conventional engines is concerned, they list several limitations because of a series of quality issues raised from their high oxygen content, water content, acidity, and thermal instability that make mandatory their pretreatment. Ruan, Wang et al described the use of zeolite ZSM-5 − or MCM41-coated , SiC foam matrices as catalysts for the ex situ catalytic and microwave-assisted fast pyrolysis (MACFP) of vapors downstream of a main pyrolysis reactor. Besides the aforementioned chemicophysical properties of SiC networks, these authors highlighted the excellent microwave absorbent properties of these materials, which ensured a more accurate temperature control at the catalytic bed when the latter was incorporated into a microwave-assisted pyrolysis (MAP) system .…”

Section: Catalytic Applicationsmentioning

confidence: 99%

“…Joining a MW-heating scheme with optimized reactors configurations from an engineering viewpoint, they have significantly increased the bio-oil quality (hydrocarbon percentages as high as 95% of which more than 71% of oxygen-free aromatics from woody oils pyrolysis over SiC/MCM41) and have reduced the occurrence of fouling phenomena due to the generation of coke deposits, hence prolonging the lifetime of their SiC-based catalytic systems. Moreover, the authors stressed the remarkably higher stability of the ZSM-5/SiC and MCM41/SiC composites for the large scale catalytic fast pyrolysis of biomass vapors even after several reaction-regeneration cycles. − …”

Section: Catalytic Applicationsmentioning

confidence: 99%

Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

et al. 2021

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There is an obvious gap between efforts dedicated to the control of chemicophysical and morphological properties of catalyst active phases and the attention paid to the search of new materials to be employed as functional carriers in the upgrading of heterogeneous catalysts. Economic constraints and common habits in preparing heterogeneous catalysts have narrowed the selection of active-phase carriers to a handful of materials: oxide-based ceramics (e.g. Al2O3, SiO2, TiO2, and aluminosilicates–zeolites) and carbon. However, these carriers occasionally face chemicophysical constraints that limit their application in catalysis. For instance, oxides are easily corroded by acids or bases, and carbon is not resistant to oxidation. Therefore, these carriers cannot be recycled. Moreover, the poor thermal conductivity of metal oxide carriers often translates into permanent alterations of the catalyst active sites (i.e. metal active-phase sintering) that compromise the catalyst performance and its lifetime on run. Therefore, the development of new carriers for the design and synthesis of advanced functional catalytic materials and processes is an urgent priority for the heterogeneous catalysis of the future. Silicon carbide (SiC) is a non-oxide semiconductor with unique chemicophysical properties that make it highly attractive in several branches of catalysis. Accordingly, the past decade has witnessed a large increase of reports dedicated to the design of SiC-based catalysts, also in light of a steadily growing portfolio of porous SiC materials covering a wide range of well-controlled pore structure and surface properties. This review article provides a comprehensive overview on the synthesis and use of macro/mesoporous SiC materials in catalysis, stressing their unique features for the design of efficient, cost-effective, and easy to scale-up heterogeneous catalysts, outlining their success where other and more classical oxide-based supports failed. All applications of SiC in catalysis will be reviewed from the perspective of a given chemical reaction, highlighting all improvements rising from the use of SiC in terms of activity, selectivity, and process sustainability. We feel that the experienced viewpoint of SiC-based catalyst producers and end users (these authors) and their critical presentation of a comprehensive overview on the applications of SiC in catalysis will help the readership to create its own opinion on the central role of SiC for the future of heterogeneous catalysis.

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Co-pyrolysis of biomass and soapstock in a downdraft reactor using a novel ZSM-5/SiC composite catalyst

Cited by 26 publications

References 34 publications

A Review of Recent Advances in Biomass Pyrolysis

A Review of Recent Advances in Biomass Pyrolysis

Selecting Catalysts for Pyrolysis of Lignocellulosic Biomass

Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

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