Effect of pyrolysis temperature on miscanthus (Miscanthus × giganteus) biochar physical, chemical and functional properties

Mimmo, Tanja; Panzacchi, Pietro; Baratieri, Marco; Davies, Christian A.; Tonon, Giustino

doi:10.1016/j.biombioe.2014.01.004

Cited by 191 publications

(79 citation statements)

References 44 publications

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“…The plot showed distinct regions for bio-char, bio-oil, and the source biomass, with bio-char appearing at the lower left hand corner, biomass at the middle, and bio-oil at the top right hand corner. The lower values of H/C and O/C atomic ratios recorded in the bio-char samples with the increase temperature are indications that an increased degree of aromaticity in the resulting bio-char structure was due to hydration, decarboxylation, and decarbonylation at high temperature, which led to enrichment of the bio-char with carbon, making the surface highly hydrophobic (Chun et al 2004;Kim et al 2011;Ahmad et al 2012;Al-Wabel et al 2013;Azargohar et al 2014;Mimmo et al 2014). bioresources.com Mohammed et al (2015).…”

Section: Characterization Of Bio-oil Non-condensable Gas and Bio-charmentioning

confidence: 99%

“…These peaks disappeared completely in the all bio-char samples, which confirms the decomposition of cellulose in the NGS. Also, the peak around 3400 cm -1 broadened and decreased in intensity with increasing pyrolysis temperature, indicating the loss of the O-H group due to ignition (Yuan et al 2011;Al-Wabel et al 2013;Mimmo et al 2014). Vibrations around 1600 cm -1 were due to ring-conjugated C=C bonding in the lignin component of the biomass, which became more pronounced in the bio-char samples with increasing pyrolysis temperature due to newly aromatized and carbonized material from carbohydrate ring dehydration and cyclisation (Pilon and Lavoie 2011;Chia et al 2012).…”

Section: Characterization Of Bio-oil Non-condensable Gas and Bio-charmentioning

confidence: 99%

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Pyrolysis of Napier Grass in a Fixed Bed Reactor: Effect of Operating Conditions on Product Yields and Characteristics

Mohammed

Abakr

Kazi

et al. 2015

BioRes

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This study presents a report on pyrolysis of Napier grass stem in a fixed bed reactor. The effects of nitrogen flow (20 to 60 mL/min), and reaction temperature (450 to 650 °C) were investigated. Increasing the nitrogen flow from 20 to 30 mL/min increased the bio-oil yield and decreased both bio-char and non-condensable gas. 30 mL/min nitrogen flow resulted in optimum bio-oil yield and was used in the subsequent experiments. Reaction temperatures between 450 and 600 °C increased the bio-oil yield, with maximum yield of 32.26 wt% at 600 o C and a decrease in the corresponding bio-char and non-condensable gas. At 650 °C, reductions in the bio-oil and bio-char yields were recorded while the non-condensable gas increased. Water content of the bio-oil decreased with increasing reaction temperature, while density and viscosity increased. The observed pH and higher heating values were between 2.43 to 2.97, and 25.25 to 28.88 MJ/kg, respectively. GC-MS analysis revealed that the oil was made up of highly oxygenated compounds and requires upgrading. The bio-char and non-condensable gas were characterized, and the effect of reaction temperature on the properties was evaluated. Napier grass represents a good source of renewable energy when all pyrolysis products are efficiently utilized..

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Section: Characterization Of Bio-oil Non-condensable Gas and Bio-charmentioning

confidence: 99%

Section: Characterization Of Bio-oil Non-condensable Gas and Bio-charmentioning

confidence: 99%

Pyrolysis of Napier Grass in a Fixed Bed Reactor: Effect of Operating Conditions on Product Yields and Characteristics

Mohammed

Abakr

Kazi

et al. 2015

BioRes

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“…FTIR spectroscopy results of all biochars exhibited flattening of bands located between 3200 and 3400 cm −1 with increasing temperature (Figure 1), indicating less intensity of the O-H stretching due to dehydration [38].…”

Section: Stability Indicatorsmentioning

confidence: 99%

Effect of Pyrolysis Temperature and Feedstock Type on Agricultural Properties and Stability of Biochars

Conz¹,

Abbruzzini²,

Andrade³

et al. 2017

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Pyrolysis temperature and feedstock type used to produce biochar influence the physicochemical properties of the obtained product, which in turn display a range of results when used as soil amendment. From soil carbon (C) sequestration strategy to nutrient source, biochar is used to enhance soil properties and to improve agricultural production. However, contrasting effects are observed from biochar application to soil results from a wide range of biochar's properties in combination with specific environmental conditions. Therefore, elucidation on the effect of pyrolysis conditions and feedstock type on biochar properties may provide basic information to the understanding of soil and biochar interactions. In this study, biochar was produced from four different agricultural organic residues: Poultry litter, sugarcane straw, rice hull and sawdust pyrolysed at final temperatures of 350˚C, 450˚C, 550˚C and 650˚C. The effect of temperature and feedstock type on the variability of physicochemical properties of biochars was evaluated through measurements of pH, electrical conductivity, cation exchange capacity, macronutrient content, proximate and elemental analyses, Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analyses. Additionally, an incubation trial was carried under controlled conditions to determine the effect of biochar stability on CO 2 -eq emissions. Results showed that increasing pyrolysis temperature supported biochar stability regardless of feedstock, however, agricultural properties varied widely both as an effect of temperature and feedstock. Animal manure biochar showed higher potential as nutrient source rather than a 915 Agricultural Sciences C sequestration strategy. Improving the knowledge on the influence of pyrolysis temperature and feedstock type on the final properties of biochar will enable the use of better tailored materials that correspond to the expected results while considering its interactions with environmental conditions.

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“…Biochar is a carbon rich product obtained by thermal decomposition of biomass in torrefaction process (Mimmoa et al 2014). During the process, the biomass partly decomposes giving off various condensable and non-condensable gases.…”

Section: Introductionmentioning

confidence: 99%

Is the biochar produced from sewage sludge a good quality solid fuel?

Pulka¹,

Wiśniewski²,

Gołaszewski³

et al. 2016

Archives of Environmental Protection

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Abstract:The infl uence of sewage sludge torrefaction temperature on fuel properties was investigated. Non-lignocellulosic waste thermal treatment experiment was conducted within 1 h residence time, under the following temperatures: 200, 220, 240, 260, 280 and 300°C. Sawdust was used as lignocellulosic reference material. The following parameters of biochar have been measured: moisture, higher heating value, ash content, volatile compounds and sulfur content. Sawdust biochar has been confi rmed to be a good quality solid fuel. High ash and sulfur content may be an obstacle for biochar energy reuse. The best temperature profi le for sawdust torrefaction and fuel production for 1 h residence time was 220°C. At this temperature the product contained 84% of initial energy while decreased the mass by 25%. The best temperature profi le for sewage sludge was 240°C. The energy residue was 91% and the mass residue was 85%. Higher temperatures in both cases caused excessive mass and energy losses.

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Effect of pyrolysis temperature on miscanthus (Miscanthus × giganteus) biochar physical, chemical and functional properties

Cited by 191 publications

References 44 publications

Pyrolysis of Napier Grass in a Fixed Bed Reactor: Effect of Operating Conditions on Product Yields and Characteristics

Pyrolysis of Napier Grass in a Fixed Bed Reactor: Effect of Operating Conditions on Product Yields and Characteristics

Effect of Pyrolysis Temperature and Feedstock Type on Agricultural Properties and Stability of Biochars

Is the biochar produced from sewage sludge a good quality solid fuel?

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