Effects of torrefaction on product distribution and quality of bio-oil from food waste pyrolysis in N2 and CO2

Ly, Hoang Vu; Kwon, Byeong Wan; Oh, Chang-Ho; Hwang, Hyun Tae; Lee, Jung Suk; Kim, Seung-Soo

doi:10.1016/j.wasman.2022.01.013

Cited by 25 publications

(2 citation statements)

References 49 publications

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“…Torrefaction pre-treatment did not improve yields of pyrolysis bio-oils, but rather formed greater yields of char [15]. The combination of torrefaction pre-treatment with the addition of CO 2 during pyrolysis of food waste in a bubbling fluidized bed reactor led to higher bio-oil yield, whereas the replacement of CO 2 with N 2 decreased the bio-oil yield, concurrently increasing the quality of a bio-oil with higher aliphatic and phenol contents [16]. Addition of zeolites into the fluidized bed reactor decreased the residence time and temperature, enabling conversion towards value-added products in a liquid phase [17].…”

Section: Introductionmentioning

confidence: 89%

Production and characterization of bio-oil from fluidized bed pyrolysis of olive stones, pinewood, and torrefied feedstock

Trubetskaya

Berg

Johnson³

et al. 2023

Journal of Analytical and Applied Pyrolysis

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Section: Introductionmentioning

confidence: 89%

Production and characterization of bio-oil from fluidized bed pyrolysis of olive stones, pinewood, and torrefied feedstock

Trubetskaya

Berg

Johnson³

et al. 2023

Journal of Analytical and Applied Pyrolysis

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“…Figure 1 shows an average yield of DS bio-oil of 44.30%. To obtain maximum pyrolysis results in the form of liquid products, high operating temperatures (300-600ºC) with low heating rates are the required pyrolysis operating conditions 54 . Mainly, the composition of the chemical compounds within bio-oil determines their quality, as these compounds serve as quality criteria for characteristic taste and aroma.…”

Section: Yield Of Durian Shells Pyrolysismentioning

confidence: 99%

Chemical Characterization and Antibacterial Activities of Bio-oil from Durian Shell Pyrolysis

Mashuni,

Kadidae,

Jahiding

et al. 2024

Valensi

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Foodborne bacteria cause food spoilage, usually Staphylococcus aureus and Escherichia coli. Thus, synthetic preservatives are employed in food preservation to prevent food spoilage caused by microorganisms. Excessive use of synthetic preservatives can cause disease. Bio-oil has become a natural preservative because of its high phenolic content. However, bio-oil still requires purification because the initial bio-oil (grade 3) still contains carcinogenic compounds that are dangerous for consumption. Therefore, this study aims to determine the components of the bio-oil compound after purification and its effectiveness as an antibacterial. Durian shell (DS) is pyrolyzed in a heating reactor without oxygen at a temperature of 330–600ºC (flow rate 6ºC/minute) with a 2-3 cm material size. Furthermore, bio-oil purification includes stages of filtration using activated zeolite, fractional distillation at 70–200ºC (grade 2), and filtration using activated charcoal (grade 1). Bio-oil purification includes stages of filtration using active zeolite and activated charcoal (grade 2), and fractional distillation at a temperature of 150–200ºC (grade 1). Based on Gas Chromatography-Mass Spectrometry (GC-MS) analysis, grade 2 and grade 1 contain the major compounds 1,4-dimethyl-1h-imidazole and acetic acid. The research showed that bio-oil grades 1 and 2, when used at a 30% concentration, exhibit antibacterial strong effects against Staphylococcus aureus and Escherichia coli. These findings suggest that bio-oil grades 1 and 2 could be valuable natural preservatives.

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Catalytic pyrolysis of torrefied biomass with molecular sieve catalysts to produce hydrocarbon rich biocrude

Singh,

Kakku,

Shah

et al. 2024

Env Prog and Sustain Energy

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The downstream processing of biocrudes obtained from direct biomass pyrolysis poses significant challenges due to stability issues, necessitating costly upgrading for further coprocessing with refinery feeds. This study examines the impact of torrefaction pretreatment on pyrolysis product distribution and biocrude composition using sawdust (SD) and groundnut shell (GS) feeds. Torrefaction was conducted at varying temperatures (200, 250 and 300°C) for 30 min under different reactor conditions. Increasing the severity of torrefaction resulted in decreased biocrude yields with reduced water content and gas formation, particularly evident with GS. A torrefaction temperature of 250°C and 30 min of pretreatment yielded higher phenolics and hydrocarbons. This increase in phenolics can be attributed to lignin enrichment during torrefaction, which, in the presence of a catalyst, undergoes deoxygenation leading to hydrocarbon formation. The influence of feed particle size, whether in powder or pellet form, on biocrude yield and composition was found to be minimal. Catalytic pyrolysis of SD using molecular sieve catalysts yielded the highest hydrocarbon (42%) and aromatic content (44%) at catalyst to biomass ratios of 1:1 and 2:3. The combination of torrefaction and pyrolysis was shown to enhance the quality of biocrude by increasing its hydrocarbon content, but at the expense of lower liquid yields. Experimental observations were supported by statistical analysis tools such as principal component analysis, which assessed pyrolysis product yields and composition.

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Effects of torrefaction on product distribution and quality of bio-oil from food waste pyrolysis in N2 and CO2

Cited by 25 publications

References 49 publications

Production and characterization of bio-oil from fluidized bed pyrolysis of olive stones, pinewood, and torrefied feedstock

Production and characterization of bio-oil from fluidized bed pyrolysis of olive stones, pinewood, and torrefied feedstock

Chemical Characterization and Antibacterial Activities of Bio-oil from Durian Shell Pyrolysis

Catalytic pyrolysis of torrefied biomass with molecular sieve catalysts to produce hydrocarbon rich biocrude

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