Biomass gasification in a catalytic fluidized reactor with beds of different materials

Miccio, Francesco; Piriou, Bruno; Ruoppolo, Giovanna; Chirone, Riccardo

doi:10.1016/j.cej.2009.04.002

Cited by 139 publications

(83 citation statements)

References 15 publications

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“…Corella et al [10] compared dolomite and olivine, concluding that dolomite was better for tar reduction but generated more fine particles than olivine. Many authors have studied the performance of olivine as an in-bed catalyst with different types of feedstock such as woody biomass or plastic waste, obtaining improvements in gas composition and tar yield compared to silica sand [11][12][13]. Rapagnà et al [14] used olivine particles during steam gasification of almond shells, concluding that it had good catalytic activity at temperatures around 800 ºC.…”

Section: Introductionmentioning

confidence: 99%

Cynara cardunculus L. gasification in a bubbling fluidized bed: The effect of magnesite and olivine on product gas, tar and gasification performance

Serrano

Kwapińska

Horvat

et al. 2016

Fuel

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Gasification of Cynara cardunculus L. was performed in a bubbling fluidized bed (BFB) using air as the gasifying agent and magnesite and olivine as different bed materials. Temperature was varied during the experiments (700-800 ºC) with fixed biomass feeding and air flow rates.The effect of using the magnesite and olivine on the gas and tar composition, carbon and biomass conversion, and cold gas efficiency was investigated. The product gas showed high hydrogen content (13-16 %v/v) for both magnesite and olivine in the temperature range studied.Higher heating value and gas yield were improved with increasing the temperature from 700 to 800 ºC. Biomass and carbon conversion were greater than 75%, giving values higher than 90 % for both 700 and 800 ºC in magnesite and for 800 ºC in olivine. Indane and cresols were the main tar compounds at low temperature while naphthalene was the dominant tar species at the high temperatures. Gasification performance was better with magnesite at 700 ºC while olivine showed better properties at 800 ºC.

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Section: Introductionmentioning

confidence: 99%

Cynara cardunculus L. gasification in a bubbling fluidized bed: The effect of magnesite and olivine on product gas, tar and gasification performance

Serrano

Kwapińska

Horvat

et al. 2016

Fuel

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“…For enhanced catalytic performance and thermal stability, various supports (such as, zeolites [4,5,7,28,29], dolomite [1,22,30,31], olivine [21,32], other metal and metal oxides such as La, Fe, CeO2, SiO2, ZrO2, TiO2, MgO, ZnO, Al2O3 [10,[33][34][35][36][37][38][39]) have been applied to change the interactions between support and metal particles which may thereby influence the catalytic properties. Particularly, alumina has been widely investigated as a catalyst support due to high activity and low cost in the reforming process [33][34][35]40].…”

Section: Introductionmentioning

confidence: 99%

Promoting hydrogen production and minimizing catalyst deactivation from the pyrolysis-catalytic steam reforming of biomass on nanosized NiZnAlOx catalysts

Dong

Ling

et al. 2017

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Hydrogen production from the thermochemical conversion of biomass was carried out with nano-sized NiZnAlOx catalysts using a two-stage fixed bed reactor system. The gases derived from the pyrolysis of wood sawdust in the first stage were catalytically steam reformed in the second stage. The NiZnAlOx catalysts were synthesized by a co-precipitation method with different Ni molar fractions (5, 10, 15, 25 and 35%) and a constant Zn:Al molar ratio of 1:4. The catalysts were characterized by a wide range of techniques, including N2 adsorption, SEM, XRD, TEM and temperature-programmed oxidation (TPO) and reduction (TPR). Fine metal particles of size around 10-11 nm were obtained and the catalysts had high stability characteristics, which improved the dispersion of active centers during the reaction and promoted the performance of the catalysts. The yield of gas was increased from 49.3 to 74.8 wt.%, and the volumetric concentration of hydrogen was increased from 34.7 to 48.1 vol.%, when the amount of Ni loading was increased from 5 to 35%. Meanwhile, the CH4 fraction decreased from 10.2 to 0.2 vol.% and the C2-C4 fraction was reduced from 2.4 vol.% to 0.0 vol.%. During the reaction, the crystal size of all catalysts was successfully maintained at around 10-11 nm with lowered catalyst coke formation, (particularly for the 35NiZn4Al catalyst where negligible coke was found) and additionally no obvious catalyst sintering was detected. The efficient production of hydrogen from the thermochemical conversion of renewable biomass indicates that it is a promising sustainable route to generate hydrogen from biomass using the NiZnAl metal oxide catalyst prepared in this work via a two-stage reaction system.

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“…Tars are a complex mixture of condensable hydrocarbons, which includes single ring to complex polynuclear aromatic hydrocarbons along with other oxygen-containing compounds [5]. Tars present a problem to downstream use of the gas, as they can condense to cause fouling [6] and coke formation in equipment [7] and upgrading catalysts. Tar generation is also common in coal gasification processes [8,9].…”

Section: Introductionmentioning

confidence: 99%

Ultra-microporous membrane separation using toluene to simulate tar-containing gases

Deonarine

Smart

et al. 2017

Fuel Processing Technology

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This study investigates the performance of ultra-microporous cobalt oxide silica membranes for processing simulated gas streams containing toluene as a model tar compound in gasification. The performance of the membranes was initially investigated for He (simulating H 2 ), CO 2 , N 2 and Ar in a range of temperatures. Subsequently, toluene was added to a gas mixture containing He and tested to 2 simulate the effect of toluene as a tar compound in gasification. The membranes delivered molecular sieving features, showing activated transport as the permeation of the smaller molecular gas He increased with temperature whilst the permeation decreased for the other larger molecular gases. Prior to toluene exposure, He permeance increased by almost twofold from 3.6 × 10 -8 to 7.1 × 10 -8 mol m -2 s -1 Pa -1 as the temperature was raised from 50 to 200 °C. Under a feed gas containing 0.24 mol% toluene, He permeance decreased by an average value of 17%. Upon regeneration of the membrane by heat, He permeance was not fully recovered, a clear indication of tar fouling. A toluene balance calculation showed toluene being retained by the membrane.

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Biomass gasification in a catalytic fluidized reactor with beds of different materials

Cited by 139 publications

References 15 publications

Cynara cardunculus L. gasification in a bubbling fluidized bed: The effect of magnesite and olivine on product gas, tar and gasification performance

Cynara cardunculus L. gasification in a bubbling fluidized bed: The effect of magnesite and olivine on product gas, tar and gasification performance

Promoting hydrogen production and minimizing catalyst deactivation from the pyrolysis-catalytic steam reforming of biomass on nanosized NiZnAlOx catalysts

Ultra-microporous membrane separation using toluene to simulate tar-containing gases

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