The vaporization of semi-volatile compounds during tobacco pyrolysis

Oja, Vahur; Hajaligol, Mohammad R.; Waymack, Bruce E.

doi:10.1016/j.jaap.2005.08.005

Cited by 48 publications

(31 citation statements)

References 21 publications

(29 reference statements)

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“…This trend was expected and was observed previously for saw dust based biochar (Azargohar et al 2014). The mass loss at higher temperature is related to dehydrogenation and aromatization of char with subsequent decomposition of inorganic element (Oja et al 2006). The pH and electrical conductivity (EC) of the prepared biochar increased slightly with increasing temperature.…”

Section: Ratio Of O/csupporting

confidence: 85%

Influence of Carbonization Temperature on Physicochemical Properties of Biochar derived from Slow Pyrolysis of Durian Wood (Durio zibethinus) Sawdust

Chowdhury¹,

Karim²,

Ashraf³

et al. 2016

BioResources

111

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The objective of this study was to explore the influence of pyrolysis temperature on the physicochemical properties of biochar synthesized from durian wood (Durio zibethinus) sawdust. Surface morphological features, including the porosity and BET surface area of biochars, provide appropriate dimensions for growing clusters of microorganisms with excellent water retention capacity in soil. Oxygen-containing surface functional groups play a vital role in improving soil fertility by increasing its cation and anion exchange capacities with reduced leaching of nutrients from the soil surface. Biochar was produced via slow pyrolysis of woody biomass (WS) using a fixed bed reactor under an oxygen-free atmosphere at different pyrolysis temperatures (350, 450, and 550 °C). The biochars obtained were characterized using ultimate and proximate analyses, Brunauer-Emmett-Teller (BET) surface area, field-emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). The yield of biochar decreased from 66.46 to 24.56%, whereas the BET surface area increased sharply from 2.567 to 220.989 m 2 /g, when the pyrolysis temperature was increased from 350 to 550 °C. The results highlighted the effect of pyrolysis temperature on the structure of the biochar, which could be advantageous for agricultural industries.

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Section: Ratio Of O/csupporting

confidence: 85%

Influence of Carbonization Temperature on Physicochemical Properties of Biochar derived from Slow Pyrolysis of Durian Wood (Durio zibethinus) Sawdust

Chowdhury¹,

Karim²,

Ashraf³

et al. 2016

BioResources

111

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“…The DTG results (Fig. 7b) indicated that cellulose, hemicellulose, and lignin components of NGS biomass were completely volatilized, and the weight losses were mainly due to dehydrogenation and aromatization of the bio-char in addition to decomposition of inorganic components (Oja et al 2006;Azargohar et al 2014). The degree of aromaticity in the bio-char structure was evaluated by plotting a Van Krevelen chart, as shown in Fig.…”

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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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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“…Due to the vacuum condition used, evaporation of the original solvent extractables (or bitumen) without thermal decomposition before major pyrolytic processes, and therefore separation of peaks, is expected. For example, vaporization of solanesol (molecular weight 630 Da) and wax esters with solanesol units (molecular weight 748 Da) were observed in tobacco pyrolysis below 300 • C in similar type FIMS experiments [28]. Fig.…”

Section: Resultsmentioning

confidence: 64%

Solvent swelling of Dictyonema oil shale: Low temperature heat-treatment caused changes in swelling extent

Kilk

Savest

Yanchilin

et al. 2010

Journal of Analytical and Applied Pyrolysis

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The vaporization of semi-volatile compounds during tobacco pyrolysis

Cited by 48 publications

References 21 publications

Influence of Carbonization Temperature on Physicochemical Properties of Biochar derived from Slow Pyrolysis of Durian Wood (Durio zibethinus) Sawdust

Influence of Carbonization Temperature on Physicochemical Properties of Biochar derived from Slow Pyrolysis of Durian Wood (Durio zibethinus) Sawdust

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

Solvent swelling of Dictyonema oil shale: Low temperature heat-treatment caused changes in swelling extent

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