Enriched-air fluidized bed gasification using bench and pilot scale reactors of dairy manure with sand bedding based on response surface methods

Nam, Hyungseok; Maglinao, Amado L.; Capareda, Sergio C.; Alejandro, David

doi:10.1016/j.energy.2015.11.065

Cited by 50 publications

(28 citation statements)

References 35 publications

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“…Both effects can increase gasification temperature; hence, H 2 and CO formation can be boosted in comparison with gasification fed with air only. Similar effects of adding O 2 have been reported previously [53].…”

Section: Discussionsupporting

confidence: 76%

Low-Cost Syngas Shifting for Remote Gasifiers: Combination of CO2 Adsorption and Catalyst Addition in a Novel and Simplified Packed Structure

et al. 2018

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This paper presents the technical validation of a novel, low-complexity alternative based on the inclusion of a patented (IEPI-MU-2016-185) packed bed for improving the performance of remote, small-scale gasification facilities. This study was carried out in an updraft, atmospheric-pressure gasifier, outfitted with a syngas reflux line, air and oxygen feed, and an upper packed-bed coupled to the gasification unit to improve the syngas quality by catalytic treatment and CO 2 adsorption. The experimental facility is located in the rural community San Pedro del Laurel, Ecuador. Gasification experiments, with and without packed material in the upper chamber, were performed to assess its effect on the syngas quality. The assessment revealed that the packed material increases the carbon monoxide (CO) content in the syngas outlet stream while carbon dioxide (CO 2 ) was reduced. This option appears to be a suitable and low-complexity alternative for enhancing the content of energy vectors of syngas in gasification at atmospheric pressure since CO/CO 2 ratios of 5.18 and 3.27 were achieved against reported values of 2.46 and 0.94 for operations which did not include the addition of packed material. It is concluded that the upper packed-bed is an active element able to modify syngas characteristics since CO 2 content was reduced.

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Section: Discussionsupporting

confidence: 76%

Low-Cost Syngas Shifting for Remote Gasifiers: Combination of CO2 Adsorption and Catalyst Addition in a Novel and Simplified Packed Structure

et al. 2018

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“…Temperature increases can be controlled by adding steam as a gasifying agent during enriched-air gasification. Enriched-air fluidised bed gasification of dairy cattle manure showed that temperature has the highest influenced on syngas composition, LHV and η G , than ER M and oxygen concentration [24].…”

Section: Beef Cattlementioning

confidence: 95%

Methods for the Treatment of Cattle Manure—A Review

Font-Palma

2019

121

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Environmental concerns, caused by greenhouse gases released to the atmosphere and overrunning of nutrients and pathogens to water bodies, have led to reducing direct spread onto the land of cattle manure. In addition, this practice can be a source of water and air pollution and toxicity to life by the release of undesirable heavy metals. Looking at the current practices, it is evident that most farms separate solids for recycling purposes, store slurries in large lagoons or use anaerobic digestion to produce biogas. The review explores the potential for cattle manure as an energy source due to its relatively large calorific value (HHV of 8.7–18.7 MJ/kg dry basis). This property is beneficial for thermochemical conversion processes, such as gasification and pyrolysis. This study also reviews the potential for upgrading biogas for transportation and heating use. This review discusses current cattle manure management technologies—biological treatment and thermochemical conversion processes—and the diverse physical and chemical properties due to the differences in farm practices.

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“…The experimental data for high tonnage sorghum (HTS) and dairy manure (DM) was imported from Maglinao Jr. et al [27] and Nam et al [28]. Woodchip (WC) gasification was conducted for this work.…”

Section: Methodsmentioning

confidence: 99%

“…The feedstock was shredded to an average particle size of less than 10 mm. The dairy manure was collected directly from an open pit at the Dairy Center at Tarleton State University in Stephenville, Texas [28]. The biomass wastes were initially airdried.…”

Section: Sample Preparation and Characterizationmentioning

confidence: 99%

Development of a modified equilibrium model for biomass pilot-scale fluidized bed gasifier performance predictions

Alejandro

Nam

Maglinao

et al. 2016

Energy

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The objective of this work is to develop a thermodynamic model considering non-stoichiometric restrictions. The model validation was done from experimental works using a bench-scale fluidized bed gasifier with wood chips, dairy manure, and sorghum. The model was used for a further parametric study to predict the performance of a pilot-scale fluidized biomass gasifier. The Gibbs free energy minimization was applied to the modified equilibrium model considering a heat loss to the surroundings, carbon efficiency, and two non-equilibrium factors based on empirical correlations of ER and gasification temperature. The model was in a good agreement with RMS < 4 for the produced gas. The parametric study ranges were 0.01 < ER < 0.99 and 500 °C < T < 900 °C to predict syngas concentrations and its LHV (lower heating value) for the optimization. Higher aromatics in tar were contained in WC gasification compared to manure gasification. A wood gasification tar simulation was produced to predict the amount of tars at specific conditions. The operating conditions for the highest quality syngas were reconciled experimentally with three biomass wastes using a fluidized bed gasifier. The thermodynamic model was used to predict the gasification performance at conditions beyond the actual operation.

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Enriched-air fluidized bed gasification using bench and pilot scale reactors of dairy manure with sand bedding based on response surface methods

Cited by 50 publications

References 35 publications

Low-Cost Syngas Shifting for Remote Gasifiers: Combination of CO2 Adsorption and Catalyst Addition in a Novel and Simplified Packed Structure

Low-Cost Syngas Shifting for Remote Gasifiers: Combination of CO2 Adsorption and Catalyst Addition in a Novel and Simplified Packed Structure

Methods for the Treatment of Cattle Manure—A Review

Development of a modified equilibrium model for biomass pilot-scale fluidized bed gasifier performance predictions

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