Recent advances of thermochemical conversion processes for biorefinery

Seo, Myung Won; Lee, See Hoon; Nam, Hyungseok; Lee, Doyeon; Tokmurzin, Diyar; Wang, Shuang; Park, Young-Kwon

doi:10.1016/j.biortech.2021.126109

Cited by 160 publications

(31 citation statements)

References 108 publications

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“…To overcome the disadvantages of the consisting methods, thermochemical processes such as pyrolysis [19], gasification [20] and liquefaction [21] were emerged. Recently, these methods have been developed to increase efficiency by adding catalysts to obtain high yield of production as well as to suppress coke formation [22].…”

Section: Introductionmentioning

confidence: 99%

Catalytic pyrolysis of Abandoned Fishing Nets using Activated Carbon Derived from Wasted Clamshell with in-situ and ex-situ Catalyst Configuration

Kim

Lee

et al. 2022

Environmental Engineering Research

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Fishing net is considered as one of the biggest problem in the world owing to the release of micro-plastics from abandoned fishing nets, which contributes to marine pollution. Although disposal and recycling strategies are considered as effective methods for overcoming these problems, the pyrolysis of abandoned waste has emerged as a strategy to recover massive quantities of waste materials. In this study, to develop an effective method to valorize abandoned fishing net, the effect of the use of a CaCO3 catalyst after the loading method (i.e., in-situ and ex-situ) on pyrolytic products of abandoned fishing net was investigated using micro-gas chromatography and gas chromatography/mass spectrometry. Compared to non-catalytic pyrolysis, catalytic pyrolysis increased the yield of non-condensable and condensable gas. Particularly, the ex-situ method significantly increased the yield of non-condensable gas to up to 37.2 wt.% at 900. Compared to the ex-situ method, in-situ loading method increased the yield of condensable products to up to 82 wt.%. The understanding of the difference between different catalyst loading configurations will provide useful insight on thermocatalytic waste conversion processes.

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Section: Introductionmentioning

confidence: 99%

Catalytic pyrolysis of Abandoned Fishing Nets using Activated Carbon Derived from Wasted Clamshell with in-situ and ex-situ Catalyst Configuration

Kim

Lee

et al. 2022

Environmental Engineering Research

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“… 3 The main thermochemical transformation processes of biomass are pyrolysis, gasification, combustion, and liquefaction. 4 − 6 Among these processes, pyrolysis is a promising method, during which biomass can be converted into biochar, bio-oil, biogas, or other high-quality products. 7 …”

Section: Introductionmentioning

confidence: 99%

“…Among different biomass types, lignocellulosic biomass is one of the most abundant resources, and its components include cellulose, hemicellulose, lignin, and a small amount of extractives . The main thermochemical transformation processes of biomass are pyrolysis, gasification, combustion, and liquefaction. − Among these processes, pyrolysis is a promising method, during which biomass can be converted into biochar, bio-oil, biogas, or other high-quality products …”

Section: Introductionmentioning

confidence: 99%

Pyrolysis Mechanism of Wheat Straw Based on ReaxFF Molecular Dynamics Simulations

Liu

Jin

2022

ACS Omega

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Biomass has played an increasingly important role in the consumption of energy worldwide because of its renewability and carbon-neutral property. In this work, the pyrolysis mechanism of wheat straw is explored using reactive force field molecular dynamics simulations. A large-scale wheat straw model composed of cellulose, hemicellulose, and lignin is built. After model validation, the temporal evolutions of the main pyrolysis products under different temperatures are analyzed. As the temperature rises, the gas production increases and the tar yield can decrease after peaking. Relatively high temperatures accelerate the generation rates of the main gas and tar species. CO and CO 2 molecules mainly come from the cleavage of CHO 2 radicals, and numerous H 2 O molecules are generated on account of dehydration. Moreover, the evolution of six functional groups and pyran and phenyl rings as well as three types of bonds is also presented. It is observed that the phenyl rings reflect improved thermostability. Finally, the pyrolytic kinetics analysis is conducted, and the estimated activation energy of wheat straw pyrolysis is found to be 56.19 kJ/mol. All these observations can help deeply understand the pyrolytic mechanism of wheat straw biomass.

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“…Biochemical conversion processes produce specific products like biogas and bioethanol, and the conversion is relatively slow. Thermochemical conversion processes produce various products relatively quickly (Seo et al, 2022). During thermochemical conversion processes, biomass is transformed into intermediate products such as syngas, bio-oil, and biochar in a reactor, depending on the conversion technology applied.…”

Section: Introductionmentioning

confidence: 99%

Oxidative torrefaction and torrefaction-based biorefining of biomass: a critical review

et al. 2022

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Torrefaction is a vital pretreatment technology for thermochemical biorefinery applications like pyrolysis, gasification, and liquefaction. Oxidative torrefaction, an economical version of torrefaction, has recently gained much attention in the renewable energy field. Recent literature on inert and oxidative torrefaction was critically reviewed in this work to provide necessary guidance for future research and commercial implementations. The critical performance parameters of torrefaction for thermochemical biorefinery applications, such as solid yield, energy yield, carbon enhancement, higher heating value (HHV) enhancement, and energy-mass co-benefit index (EMCI), were also analyzed. Agricultural waste, woody biomass, and microalgae were considered. The analysis reveals that woody biomass could equally benefit from oxidative or inert torrefaction. In contrast, inert torrefaction was found more suitable for agricultural wastes and microalgae. Using flue gas as the oxidative torrefaction medium and waste biomass as the feedstock could achieve a circular economy, improving the sustainability of oxidative torrefaction for thermochemical biorefineries. The significant challenges in oxidative torrefaction include high ash content in torrefied agricultural waste, the oxidative thermal runaway of fibrous biomass during torrefaction, temperature control, and scale-up in reactors. Some proposed solutions to address these challenges are combined washing and torrefaction pretreatment, balancing oxygen content, temperature, and residence time, depending on the biomass type, and recirculating torrefaction gases.

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Recent advances of thermochemical conversion processes for biorefinery

Cited by 160 publications

References 108 publications

Catalytic pyrolysis of Abandoned Fishing Nets using Activated Carbon Derived from Wasted Clamshell with in-situ and ex-situ Catalyst Configuration

Catalytic pyrolysis of Abandoned Fishing Nets using Activated Carbon Derived from Wasted Clamshell with in-situ and ex-situ Catalyst Configuration

Pyrolysis Mechanism of Wheat Straw Based on ReaxFF Molecular Dynamics Simulations

Oxidative torrefaction and torrefaction-based biorefining of biomass: a critical review

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