CO2 to fuel via pyrolysis of banana peel

Kwon, Dohee; Lee, Sang Soo; Jung, Sungyup; Park, Young-Kwon; Tsang, Yiu Fai; Kwon, Eilhann E.

doi:10.1016/j.cej.2019.123774

Cited by 34 publications

(6 citation statements)

References 43 publications

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“…As such, the continuous mass change observed from the TGA test (Figure 1) at 450°C is indicative of the formation of biochar 40,44 . More specifically, such observation demonstrates that maturity (the degree of carbonization) of biochar is proportionate to the experimental temperature 45 . Dehydrogenation is the critical step for increasing aromaticity of biochar 39 .…”

Section: Resultsmentioning

confidence: 81%

“…The evolution of C 1‐2 hydrocarbon species is attributable to bond scissions from the polymeric backbone of holocellulose (cellulose and hemicellulose) 43 . Lastly, the formation of H 2 is ascribed to dehydrogenation, and dehydrogenation is proportionate to the experimental temperature 45 . Thus, the evolution patterns of H 2 , CH 4 , CO, C 2 H 6 , and C 2 H 4 from the pyrolysis of PW offers that PW could be valorized into combustible gases (energy).…”

Section: Resultsmentioning

confidence: 99%

“…40,44 More specifically, such observation demonstrates that maturity (the degree of carbonization) of biochar is proportionate to the experimental temperature. 45 Dehydrogenation is the critical step for increasing aromaticity of biochar. 39 This ripening step for biochar is also reflected in the concentration profiles of CO.…”

Section: Pyrolysis Of Pw From An Inert Gas Conditionmentioning

confidence: 99%

“…43 Lastly, the formation of H 2 is ascribed to dehydrogenation, and dehydrogenation is proportionate to the experimental temperature. 45 Thus, the evolution patterns of H 2 , CH 4 , CO, C 2 H 6 , and C 2 H 4 from the pyrolysis of PW offers that PW could be valorized into combustible gases (energy). As such, it is desirable to estimate the possible recovery of these combustible gases from PW.…”

Section: Pyrolysis Of Pw From An Inert Gas Conditionmentioning

confidence: 99%

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Valorization of peanut wastes into a catalyst in production of biodiesel

Kim

Lee

Jung

et al. 2021

Intl J of Energy Research

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Summary To offer an innovative way to valorize industrial crop waste into the diverse types of biofuels, the thermochemical process of peanut waste (PW) was investigated. In particular, this study laid a great stress on the use of PW‐derived biochar as a cheap catalytic material in the production of biodiesel. Specifically, biochar derived from the pyrolysis of PW was used as a catalytic and porous medium for biodiesel production to enhance reaction kinetics and lower reaction temperature, compared to conventional methods. Two PW‐derived biochars produced at 600°C (PWB‐600) and 700°C (PWB‐700) were effective on the transesterification of soybean oil, showing higher than 95 wt% of biodiesel yield after 1 minute of transesterification reaction at ≥210°C. As a comparison, a commercially used reaction, alkali‐catalyzed transesterification, was conducted at 60°C with a KOH catalyst. Biodiesel yield from the alkali‐catalyzed reaction was less than 90 wt% even after 6 hours of reaction. Given that the biochar formation process results in the generation of pyrolytic gases and oils, both pyrolysates at different temperatures were also monitored. Pyrolytic gases included syngas and C1‐2 hydrocarbons, whereas pyrolytic oils consisted of phenolic compounds that can be used as intermediates for the synthesis of value‐added chemicals. Thus, the results confirmed that the thermochemical upgrading of PW produces value‐added industrial chemicals (pyrolytic gases and oils) and biochars that are highly active for the biodiesel production process.

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Section: Resultsmentioning

confidence: 81%

Section: Resultsmentioning

confidence: 99%

Section: Pyrolysis Of Pw From An Inert Gas Conditionmentioning

confidence: 99%

Section: Pyrolysis Of Pw From An Inert Gas Conditionmentioning

confidence: 99%

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Valorization of peanut wastes into a catalyst in production of biodiesel

Kim

Lee

Jung

et al. 2021

Intl J of Energy Research

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“…At higher temperature, thermal degradation rate was significantly retarded due to depletion of volatile matters. 19 The slow thermal degradation of rice husk at ≥ 400 °C was attributed to carbonization of biomass compounds, originating from dehydrogenation and deoxygenation reactions. 5,7 Note that deoxygenation and dehydrogenation reactions result in chemical bond scissions of oxygen and hydrogen from reactants, thereby decreasing oxygen and hydrogen contents in biochar.…”

Section: Biochar Formation From Pyrolysis Of Rice Huskmentioning

confidence: 99%

Pyrolysis of rice husk using CO₂ for enhanced energy production and soil amendment

Kim

Lee

et al. 2022

Energy & Environment

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Anthropogenic CO2 generations from use of fossil resources has led to catastrophic climate problems. Biochar is a promising material for CO2 capture and storage in soil, because it does not require additional storage space. To produce biochar, pyrolysis is required in an oxygen-limited condition. In an attempt to offer more environmentally benign route for biochar formation, this study introduced CO2 as a reaction agent. Using rice husk as a model compound, biochars were produced under CO2 and N2 condition. Porosity of rice husk biochars (RHBs) were enhanced under CO2 condition, because CO2 affected to formation of nano-sized pores. pH and moisture retention capacity of garden soil was controlled with an addition of RHBs. Mixtures of garden soil and RHB were also used as cultivation media for growth of barley grass, and plant growth in the mixtures was improved by 20% comparing to garden soil. Moreover, CO2 contributed to enhanced syngas generation during biochar production through gas phase reactions between CO2 and volatile compounds. Thus, this study proved that CO2 is a useful reactant for pyrolysis of biomass waste.

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