Air–steam gasification of biomass in a fluidised bed: Process optimisation by enriched air

Campoy, M.; Gómez–Barea, Alberto; Vidal, Fernando B.; Ollero, P.

doi:10.1016/j.fuproc.2008.12.007

Cited by 175 publications

(121 citation statements)

References 13 publications

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“…The gas yield data from the sewage sludge gasification varied between 0.89 and 1.32 m 3 STP /kg SS daf, so these values are close to the typical ones found in the literature for similar operating conditions and different kinds of biomass [7,9,12].…”

Section: Gas Yieldsupporting

confidence: 85%

“…The overall flow rate of gasifying agent was kept constant when the H 2 O/O 2 molar ratio was modified. These three factors together with their respective ranges of study were chosen on the basis of works of other authors concerning gasification of different kinds of biomass in fluidized bed reactors [9][10][11][12].…”

Section: Experimental Design and Data Analysismentioning

confidence: 99%

“…Higher temperatures favor the production of CO through reactions such as steam and dry reforming (8,9), the Boudouard reaction (3) or the water-gas primary reaction (4). However, negligible variations or even the opposite trend in CO production are found in the literature [10,11], which reveals the importance of the nature of the biomass and the operating conditions in the evolution of CO production.…”

Section: Production Of Each Gaseous Compoundmentioning

confidence: 99%

“…It has a negative effect due to the enhancement of the endothermic reactions in which CH 4 is consumed, such as steam and dry reforming (8,9), and the restriction of the methanation reaction (7) due to its exothermic nature. The negative effect of the temperature on the theoretical yield of CH 4 is intensified by increasing the H 2 O/O 2 ratio and/or decreasing the GR.…”

Section: Production Of Each Gaseous Compoundmentioning

confidence: 99%

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Air–steam gasification of sewage sludge in a fluidized bed. Influence of some operating conditions

Gil-Lalaguna

Sánchez

Murillo

et al. 2014

Chemical Engineering Journal

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An experimental work was carried out to investigate the viability of energy recovery from the air-steam gasification of sewage sludge. The relative influence of different factors, as well as the effect of their possible interactions, has been determined by means of analysis of variance. Temperature was found to be the most influential factor for most of the variables analyzed. Solid yield (35-41 wt. %) and tar content (11-45 g/m 3 STP ) were largely reduced with temperature, whereas gas production (0.89-1.32 m 3 STP /kg sewage sludge dry and ash free), carbon yield to gas phase (62-90 wt. %), gasification efficiency (39-66 %), and H 2 and CO yields (20-52 and 137-414 g/kg sewage sludge dry and ash free, respectively) were improved at high temperature. Other important parameters for the end-use of the gas such as its heating value (4.12-6.20 MJ/m 3 STP ) and its H 2 /CO molar ratio (1.46-3.25) were greatly influenced by the composition of the gasification medium, since the increase in the steam to oxygen ratio was favourable for both. The comparison of experimental and theoretical results highlights that equilibrium was not reached during the experimental runs.

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Section: Gas Yieldsupporting

confidence: 85%

Section: Experimental Design and Data Analysismentioning

confidence: 99%

Section: Production Of Each Gaseous Compoundmentioning

confidence: 99%

Section: Production Of Each Gaseous Compoundmentioning

confidence: 99%

See 2 more Smart Citations

Air–steam gasification of sewage sludge in a fluidized bed. Influence of some operating conditions

Gil-Lalaguna

Sánchez

Murillo

et al. 2014

Chemical Engineering Journal

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“…The performance of a MBHEF is studied using the composition (CO, CO 2 , H 2 , CH 4 ) from test 1 of experiments conducted by Campoy et al [47]. The gas temperature and the water content are set as 700 C and 10% of gas volume respectively, since they are typical results in gasification.…”

Section: Resultsmentioning

confidence: 99%

Moving bed syngas conditioning: Modelling

Gómez-García

Sánchez-Prieto

Soria-Verdugo

et al. 2014

Applied Thermal Engineering

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This paper presents a modelling approach for simulating tars and particulate (dust) removal in a moving bed heat exchange filter (MBHEF) in order to satisfy gas requirements of end-use syngas applications: engines and turbines. The two-dimension, adiabatic, steady-state proposed model accounts for two-phase (gas and solid) and neglects conduction and mass diffusion. Tars condensation is modelled through representative tar class lumps: phenol (class 2), naphthalene (class 4), pyrene (class 5). The model also considers tar concentration influence on the tar dew point. The filtration model is taken from literature. A sensitivity analysis is performed varying the particle size and the superficial gas velocity. Maps of temperature and tars abatement efficiency are presented. The simulation results indicate the feasibility of the use a MBHEF as tars removal equipment benefiting its advantages against others gas-cleaning methods with acceptable pollutant removal efficiencies, ranging 88e94% for ranges studied. Results also point out low gas velocities (0.5-1 m/s) and high particle size (400e700 mm) for reducing operational costs in MBHEFs with compact size.

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