A kinetic study on pyrolysis and combustion characteristics of oil cakes: Effect of cellulose and lignin content

Gottipati, Ramakrishna; Mishra, Susmita

doi:10.1016/s1872-5813(11)60021-2

Cited by 54 publications

(13 citation statements)

References 19 publications

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“…De-oiled cake, a solid residue that was discarded after extraction of oil seeds, contains lignin and cellulose in varying ratios. Moreover due to increasing demand of biodiesel, lots of oil cakes have increased tremendously and about 2 tonnes of oil cake is dumped as a waste for every tonne of biodiesel production [20]. Large amount of de-oiled cake is generated as by-product during production of biodiesel from its seeds.…”

Section: B Biomassmentioning

confidence: 99%

Thermo-Chemical Conversion of Jatropha Deoiled Cake: Pyrolysis vs. Gasification

Sharma¹,

Sheth²

2015

IJCEA

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Abstract-Pyrolysis and gasification of biomass is considered to be the promising alternative solutions for the increase of energy demand and environmental awareness. Pyroysis process produces a variety of chemicals by limited degradation and gasification process leads to complete breakdown of the biomass into permanent gases. By gasification, solid biomass is converted into a combustible gas mixture normally called "Producer Gas" consisting primarily of hydrogen and carbon monoxide, with lesser amounts of carbon dioxide, water, methane, higher hydrocarbons, nitrogen and particulates. Whereas the pyrolysis process produces a mainly three types of products: solid (charcoal), liquid (tar and other organics) and gaseous products. In the present study, Jatropha de-oiled cake is taken as a biomass. The pyrolysis and gasification experiments are carried out for comparing the results. The biomass is pyrolyzed in a fixed bed reactor in a Nitrogen environment as well used to produce the producer gas in a fixed bed downdraft biomass gasifier.

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Section: B Biomassmentioning

confidence: 99%

Thermo-Chemical Conversion of Jatropha Deoiled Cake: Pyrolysis vs. Gasification

Sharma¹,

Sheth²

2015

IJCEA

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“…Biomass is the third largest primary energy resource in the world [1]. This fact has made its development and utilization attractive worldwide owing to energy crisis problems [2] and increasing environmental concerns [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…The combustion characteristics of biomass are based on the main constituents of each type of biomass, such as cellulose, hemicellulose and lignin [1]. Knowledge of the chemical composition, thermal behavior and reactivity of biomass is thus very important for the effective design and operation of thermochemical conversion appliances [7].…”

Section: Introductionmentioning

confidence: 99%

Determination and comparison of combustion kinetics parameters of agricultural biomass from olive trees

et al. 2015

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a b s t r a c tThermogravimetric curves in air, measured for the different types of agricultural residues from olive trees (leaves, pruning and wood) at different heating rates (5, 10, 20, 40, 100 K/min), are subjected to kinetic evaluation by model-based and model-free methods. It is shown that the combustion process in the samples analyzed can be divided into three stages: water removal, roasting phase and char decomposition. At every stage, the activated energy varies with the mass conversion for the kinetic models considered. Its value was determined by the model-free methods, of which FlynneWalle Ozawa and KissingereAkahiraeSunose were the most appropriate for this purpose and resulted in similar values of activated energy. Once the activation energy was determined, the order of the reactions and the frequency factors of each stage were calculated by means of the CoatseRedfern model-based method in order to complete the determination of the kinetic triplet. From the results obtained, it was deduced that the most feasible reaction order was one.

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“…The fitting of the model was performed using Matlab® software, evaluating Equation (6) under the criteria of minimization of SE from Equation (7). Thermogram shows a first event that is related with water release (zone 1) (Gottipati & Mishra, 2011), followed by a second event that corresponds to the first thermal decomposition (zone 2), then , the main pyrolytic event is reached with two peaks of similar height (zone 3), and finally, a slow rate decomposition zone (zone 4). Water loss at temperatures below 393 K corresponds to the humidity of the sample, weight loss in zone 2 of the Figure 1b is due to the decomposition of oils and volatile substances in the husk.…”

Section: Resultsmentioning

confidence: 99%

Devolatilization of African Palm (Elaeis guineensis) Husk studied by TG-MS

Albis¹,

Ortiz²,

Piñeres³

et al. 2018

Ing. Inv.

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Using simultaneous thermogravimetrical analysis coupled with mass spectroscopy, the pyrolysis of African palm husk, using several heat rates and programs was performed. Seven relations of mass/charge were followed of the evolved gas of the pyrolysis process, fitting the kinetics and the mass spectroscopy signals to the distributed activation energy model (DAEM) with different numbers of pseudo-components. Fitting with four pseudo-components proved to be the best for modeling the thermal degradation process. Kinetic parameters were not affected by the heating rate or program employed, which agrees with other reports for similar biomass. Methane, methanol formaldehyde, furfural were successfully fitted to the DAEM model, nevertheless CO 2 and NO 2 were not able to be represented by this model due to its production in secondary reactions in gaseous phase.Keywords: TG-MS, pyrolysis, African Palm, husk. RESUMENSe estudió la pirólisis del cuesco de palma africana utilizando diferentes programas de calentamiento, recurriendo al uso de la técnica simultánea de análisis termogravimétrico acoplado a espectrometría de masas. En los gases de evolución, se siguieron las intensidades de señal de espectrometría de masas de siete relaciones m/z. La cinética de pirólisis de este residuo del procesamiento de aceite de palma se ajustó al modelo de distribución de energías de activación con diferentes números de pseudo-componentes. Los resultados del ajuste mostraron que son necesarios al menos cuatro pseudo-componentes para modelar satisfactoriamente los perfiles termogravimétricos de la pirólisis del cuesco de palma. Se encontró que la velocidad de calentamiento no afecta significativamente los parámetros del modelo cinético, los cuales se encuentran en concordancia con los reportados en la literatura para biomasas similares. Los perfiles de las curvas de intensidad de señal para las relaciones m/z seleccionadas se modelaron utilizando los parámetros cinéticos obtenidos del ajuste de los datos termogravimétricos, lográndose resultados satisfactorios para las relaciones m/z correspondientes a fragmentos de moléculas como metano, metanol, formaldehído y furfural. La falta de ajuste de las intensidades de señal correspondientes a CO 2 y NO 2 se atribuyó a que la formación de estos compuestos es consecuencia no sólo de la descomposición de la biomasa, sino también a su aparición resultado de reacciones secundarias en fase gaseosa.Palabras clave: TG-MS, pirólisis, palma africana, cuesco.

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A kinetic study on pyrolysis and combustion characteristics of oil cakes: Effect of cellulose and lignin content

Cited by 54 publications

References 19 publications

Thermo-Chemical Conversion of Jatropha Deoiled Cake: Pyrolysis vs. Gasification

Thermo-Chemical Conversion of Jatropha Deoiled Cake: Pyrolysis vs. Gasification

Determination and comparison of combustion kinetics parameters of agricultural biomass from olive trees

Devolatilization of African Palm (Elaeis guineensis) Husk studied by TG-MS

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