Prediction of the working parameters of a wood waste gasifier through an equilibrium model

Altafini, Carlos Roberto; Wander, Paulo Roberto; Barreto, Ronaldo M.

doi:10.1016/s0196-8904(03)00025-6

Cited by 254 publications

(148 citation statements)

References 7 publications

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“…The molar percentage of CO 2 is observed to increase with an increase in ER, similar to the trend established by Altafini et al (2003). In reality, the trend of CO 2 could be correlated with the trend opposite to that for CO. A decrease in concentration of CO 2 indicates better gasification efficiency (Zainal et al 2002).…”

Section: B) Effect Of Er On Co 2 and Chsupporting

confidence: 80%

“…Jayah et al (2003) observed that a lower temperature reduces the reaction rate and thereby the conversion efficiency. Altafini et al (2003) stated that equilibrium models are especially good at high temperatures where the reaction temperatures are above 1500 K. The temperatures generally assumed for equilibrium modeling by different researchers were not coherent and were predominantly modeled between 800 -1000 K. Moreover the zone of the gasifier having this temperature was also not reported. Prins et al (2006) remarked that for fluidized bed gasifiers, the average bed temperature can be used as the process temperature, whereas for downdraft gasifiers, the outlet temperature at the throat exit should be used.…”

Section: C) Effect Of Er On N 2 and H 2mentioning

confidence: 99%

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Performance prediction and validation of equilibrium modeling for gasification of cashew nut shell char

Ramanan

Elango

Sethumadhavan

et al. 2008

Braz. J. Chem. Eng.

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-Cashew nut shell, a waste product obtained during deshelling of cashew kernels, had in the past been deemed unfit as a fuel for gasification owing to its high occluded oil content. The oil, a source of natural phenol, oozes upon gasification, thereby clogging the gasifier throat, downstream equipment and associated utilities with oil, resulting in ineffective gasification and premature failure of utilities due to its corrosive characteristics. To overcome this drawback, the cashew shells were de-oiled by charring in closed chambers and were subsequently gasified in an autothermal downdraft gasifier. Equilibrium modeling was carried out to predict the producer gas composition under varying performance influencing parameters, viz., equivalence ratio (ER), reaction temperature (RT) and moisture content (MC). The results were compared with the experimental output and are presented in this paper. The model is quite satisfactory with the experimental outcome at the ER applicable to gasification systems, i.e., 0.15 to 0.30. The results show that the mole fraction of (i) H 2 , CO and CH 4 decreases while (N 2 + H 2 O) and CO 2 increases with ER, (ii) H 2 and CO increases while CH 4 , (N 2 + H 2 O) and CO 2 decreases with reaction temperature, (iii) H 2 , CH 4 , CO 2 and (N 2 + H 2 O) increases while CO decreases with moisture content. However at an equivalence ratio less than 0.15, the model predicts an unrealistic composition and is observed to be non valid below this ER.

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Section: B) Effect Of Er On Co 2 and Chsupporting

confidence: 80%

Section: C) Effect Of Er On N 2 and H 2mentioning

confidence: 99%

Performance prediction and validation of equilibrium modeling for gasification of cashew nut shell char

Ramanan

Elango

Sethumadhavan

et al. 2008

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…They concluded that the equilibrium model fits the real process well. Similar conclusions for biomass gasification are presented by the same authors [3], simulating the gasifying process in a downdraft gasifier, where the object of study was the effect of the biomass moisture content on the final gas composition assuming chemical equilibrium. Lapuerta et al [4] predicted the product gas composition as a function of the fuel/ air ratio by means of an equilibrium model.…”

Section: Introductionsupporting

confidence: 72%

Second Law Analysis of Bubbling Fluidized Bed Gasifier for Biomass Gasification

Fakhim¹,

Farhanieh²

2011

Progress in Biomass and Bioenergy Production

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“…In [51], a similar review is proposed but including artificial neural networks and Aspen Plus gasification models, while [52] focuses on mathematical and computational approaches for design of biomass gasification for hydrogen production. In [53], biomass gasification in bubbling and circulating fluidized bed gasifiers is reviewed, including both black-box models and computational fluid-dynamic ones or comprehensive fluidization models, with semi-empirical correlations.…”

Section: Gasification Technologies and Modelling Approachesmentioning

confidence: 99%

Modeling and Experimental Study of a Small Scale Olive Pomace Gasifier for Cogeneration: Energy and Profitability Analysis

et al. 2017

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A thermodynamic model of a combined heat and power (CHP) plant, fed by syngas produced by dry olive pomace gasification is here presented. An experimental study is carried out to inform the proposed model. The plant is designed to produce electric power (200 kW el ) and hot-water by using a cogenerative micro gas turbine (micro GT). Before being released, exhausts are used to dry the biomass from 50% to 17% wb. The ChemCad software is used to model the gasification process, and input data to inform the model are taken from experimental tests. The micro GT and cogeneration sections are modeled assuming data from existing commercial plants. The paper analyzes the whole conversion process from wet biomass to heat and power production, reporting energy balances and costs analysis. The investment profitability is assessed in light of the Italian regulations, which include feed-in-tariffs for biomass based electricity generation.

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Prediction of the working parameters of a wood waste gasifier through an equilibrium model

Cited by 254 publications

References 7 publications

Performance prediction and validation of equilibrium modeling for gasification of cashew nut shell char

Performance prediction and validation of equilibrium modeling for gasification of cashew nut shell char

Second Law Analysis of Bubbling Fluidized Bed Gasifier for Biomass Gasification

Modeling and Experimental Study of a Small Scale Olive Pomace Gasifier for Cogeneration: Energy and Profitability Analysis

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