Adiabatic fixed bed gasification of dairy biomass with air and steam

Gordillo, G.; Annamalai, K.

doi:10.1016/j.fuel.2009.07.018

Cited by 49 publications

(32 citation statements)

References 8 publications

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“…Those values are similar to the ones reported in previous gasification studies. That is, high heating values (HHV), ranging from 3268 kJ/SATP m 3 to 4581 kJ/SATP m 3 , were reported by [9] Gordillo and Annamalai, for a syngas obtained from air-steam dairy biomass gasification.…”

Section: Discussionmentioning

confidence: 91%

“…At constant SF, increasing ER implies less O 2 supplied to the gasifier, resulting in H 2 O-rich mixtures that are favorable for the reaction of char with H 2 O (reforming reaction) to produce H 2 and CO. Also, higher ER leads to lower combustion temperatures (peak temperatures), which are more appropriate for the production of CO 2 than CO, via char oxidation (reaction R 3 ). Oxidation of char to produce CO and CO 2 via reactions R 2 and R 3 is competitive, and their reaction rates are very dependent on the temperature; low temperatures favor the production of CO 2 through reaction R 3 [9]. Less production of CO implies more O 2 free to react with remaining char and hence more CO 2 ( Figure 11).…”

Section: Gas Composition In This Sectionmentioning

confidence: 99%

“…The biomass enters at the top of the gasifier and goes down to the drying zone (373 K < T < 450 K) where the moisture content is released [8]. Afterwards, the biomass descends to the pyrolysis zone (450 K < T < 900 K) to release the Volatile Matter (VM) and to produce char, which descends to the reduction zone where the C atoms reacts with gases (H 2 O, CO 2 , and H 2 ) coming from the combustion zone to produce secondary products such as CO, H 2 , and CH 4 [9]. The remaining char, from the reduction zone, passes to the combustion zone where the C atoms are oxidized with the oxygen from the air supplied to produce CO and CO 2 and the heat required to drive the system.…”

Section: Introductionmentioning

confidence: 99%

“…The species leaving the reactor depend on operating parameters such as temperature, pressure, species concentration, biomass particle size, and residence time [20]. The time for developing Table 1: Chemical reactions in gasification process, adapted from [9,21,22].…”

Section: Introductionmentioning

confidence: 99%

“…Thus, hydrogen concentration was higher than that without using a porous ceramic reforming. In 2009, Gordillo and Annamalai [9] performed a study on dairy biomass adiabatic gasification carried out in a fixedbed gasifier and using air-steam blends as oxidizing source. The effects of ER and SF on syngas composition (H 2 , CO, CO 2 , N 2 , CH 4 , and C 2 H 6 ), temperature profiles, syngas HHV, and energy conversion were discussed.…”

Section: Introductionmentioning

confidence: 99%

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Adiabatic Fixed-Bed Gasification of Colombian Coffee Husk Using Air-Steam Blends for Partial Oxidation

Javier

Gordillo

2017

Journal of Combustion

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The increasing energy consumption, mostly supplied by fossil fuels, has motivated the research and development of alternative fuel technologies to decrease the humanity's dependence on fossil fuels, which leads to pollution of natural sources. Small-scale biomass gasification, using air-steam blends for partial oxidation, is a good alternative since biomass is a neutral carbon feedstock for sustainable energy generation. This research presents results obtained from an experimental study on coffee husk (CH) gasification, using air-steam blends for partial oxidation in a 10 kW fixed-bed gasifier. Parametric studies on equivalence ratio (ER) (1.53 < ER < 6.11) and steam-fuel (SF) ratio (0.23 < SF < 0.89) were carried out. The results show that increasing both SF and ER results in a syngas rich in CH 4 and H 2 but poor in CO. Also, decreased SF and ER decrease the peak temperature ( peak ) at the gasifier combustion zone. The syngas high heating value (HHV) ranged from 3112 kJ/SATPm 3 to 5085 kJ/SATPm 3 and its maximum value was obtained at SF = 0.87 and ER = 4.09. The dry basis molar concentrations of the species, produced under those operating conditions (1.53 < ER < 6.11 and 0.23 < SF < 0.89), were between 1.12 and 4.1% for CH 4 , between 7.77 and 13.49% for CO, and between 7.54 and 19.07% for H 2 . Other species were in trace amount.

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Section: Discussionmentioning

confidence: 91%

Section: Gas Composition In This Sectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Adiabatic Fixed-Bed Gasification of Colombian Coffee Husk Using Air-Steam Blends for Partial Oxidation

Javier

Gordillo

2017

Journal of Combustion

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Liquid yield from juniper and mesquite bio-fuel gasification

Chen

Thanapal

Annamalai

et al. 2015

Int. J. Energy Res.

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SUMMARYMesquite (Prosopis glandulosa) and redberry juniper (Juniperus pinchotii) are two woody species which dominate uncultivated lands in the south central Great Plains, USA (Texas, Oklahoma) and may have potential for bioenergy utilization. In this study, these two biomasses were gasified in an adiabatic, updraft fixed-bed gasifier using air as medium. The products include low heating value gas and liquid tar yield. The effects of fuel moisture content and the equivalence ratio (ER) on liquid yields including heavy tar and light tar and higher heating value (HHV) of the producer gas were investigated. It was found that updraft gasifiers produce a large amount of tar, in a range of 100 g/Nm 3 of gas produced. As the equivalence ratio (ER) increased (i.e. more rich char conditions), peak temperature (T peak ) within the bed decreased due to the lesser partial oxidization. The liquid yield showed peak value with change in moisture content between 6 and 24%. Heavy tar is a very high quality fuel with a higher heating value of over 29 MJ/kg on a dry, ash-free (DAF) basis which is a slightly higher than that of ethanol.

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