Experimental investigation on hydrogen production from biomass gasification in interconnected fluidized beds

Song, Tao; Wu, Jiahua; Shen, Laihong; Xiao, Jun

doi:10.1016/j.biombioe.2011.10.021

Cited by 128 publications

(63 citation statements)

References 18 publications

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“…At atmospheric pressure, CH 4 from the syngas is normally the product of biomass pyrolysis, i.e. from reaction R1 [16]. At higher temperatures, the gas generated from biomass in the pyrolysis zone could undergo further reactions (secondary reactions) such as tar cracking, as described by reaction R2, which leads to an increase in CH 4 concentration with bed temperature.…”

Section: Effect Of Bed Reactor Temperature On the Gas Yieldmentioning

confidence: 99%

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Kinetics and Performance of Raw and Torrefied Biomass in a Continuous Bubbling Fluidized Bed Gasifier

Al-Farraji

Marsh

Steer

et al. 2017

Waste Biomass Valor

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This paper is an experimental study of the kinetics of gasification of olive kernel by using a thermogravimetric fluidized bed reactor technique. Gasification of 'as received' and torrefied olive kernels were investigated in a lab-scale bubbling fluidized bed gasifier, operating at up to 3.2 kg/h. The effect of bed temperature between 550 and 750 °C in 50 °C increments on the gasification product gas at mass-based equivalence ratios of 0.15 and 0.2 was studied. To explore the potential of torrefied biomass, the gasification results were compared to that of the 'as received' biomass. The product gas from torrefied biomass produced higher H 2 , CO and CH 4 concentrations at identical oxidant flow rates in addition to higher cold gas efficiency and higher product gas heating value. The influence of equivalence ratio in gasification was also investigated at reactor temperatures of 750 °C and five equivalence ratios (0.15, 0.2, 0.25, 0.3, and 0.35). The results revealed that the torrefied biomass has the highest HHV at an equivalence ratio of 0.2 with a value of 6.09 MJ/Nm 3 , while 'as received' biomass 4.72 MJ/Nm 3 . Kinetic experiments under isothermal conditions were performed for the gasification of the materials in continuous mode. A mass balance model was successfully used to provide the capability of separately determining the rate constant of the reactions taking place. The kinetic parameters were calculated by a first order reaction model giving activation energies for 'as received' olive kernels of 84 kJ/mol and for torrefied olive kernels of 106 kJ/mol.

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Section: Effect Of Bed Reactor Temperature On the Gas Yieldmentioning

confidence: 99%

“…Bed temperature is one of the most significant parameters affecting all the chemical reactions included in the combustion and gasification process. In order to simplify the gasification mechanism, the proposed reaction scheme was used to explain biomass gasification in the fluidized bed as follows [15,16]:…”

Section: Introductionmentioning

confidence: 99%

Kinetics and Performance of Raw and Torrefied Biomass in a Continuous Bubbling Fluidized Bed Gasifier

Al-Farraji

Marsh

Steer

et al. 2017

Waste Biomass Valor

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“…The significant advantage of a CLC system is that a concentrated CO 2 stream can be obtained from the combustion gas stream after water condensation without requiring any energy for separation or purification. In addition, nitrogen oxide (NO x ) production is greatly reduced [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…Most of the existing CLC literature has focused on the development of suitable synthetic oxygen carrier materials [2][3][4][5][6][7][8][9][10][11][12]. In these previous works, the authors extensively describe diverse preparation methods and different chemical compositions.…”

Section: Introductionmentioning

confidence: 99%

Feasible utility of inorganic remains from potable water purification process in chemical looping combustion studied in TG

Ksepko

2014

J Therm Anal Calorim

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The objective of the research is to prepare naturally occurring Fe-based materials for use as oxygen carriers and investigate their reactivity in terms of their applicability to energy systems. The inductively coupled plasma optical emission spectrometry test showed that the sediments from potable water purification were largely composed of Fe 2 O 3 (57.8-58.1 %), SiO 2 (25.2-30.7 %), CaO (3.92-8.43 %), and Mn 3 O 4 (0.94-1.39 %). Sediments were examined by cyclic redox experiments in the thermogravimetric analyzer and were compared with reference materials. Gaseous (3 % H 2 ) and solid fuel (hard coal) were tested in terms of chemical looping combustion (CLC). Three cycle tests showed their good reactivity performance. The temperature-depended oxygen transport capacity varied from 4 to 13.9 % by mass. The fairly stable performance was observed during twenty redox cycles. The X-ray powder diffraction patterns after cycling tests showed a stable crystalline phase and confirmed that complete regeneration was achieved, that is contrary to synthetic carriers. Possibly other elements may help to maintain their reactivity and prevented the silicate formation. Scanning electron micrographs of reacted samples showed minor morphology changes. Based on these results, those wastes might be successfully used in a CLC process as efficient and low-cost oxygen carriers.

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“…The key parameter for the gasification of biomass process is temperature, which determines the composition of the resulting gas [10,15,17,20,23] and its calorific value [14]. That is why the influence of temperature on the gasification process was investigated in this paper.…”

Section: Introductionmentioning

confidence: 99%

Kinetics examination of pressurised steam gasification of beech wood

et al. 2016

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Abstract. In Poland, among all renewable energy sources, share of biomass in electricity production is the largest. Great potential in biomass utilization involves use of gasification technology. The course of biomass gasification process in steam atmosphere is the subject of numerous scientific studies. The aim of this study was kinetics examination of pressurized beech wood waste gasification, that can be successfully used in industrial gasification. Measurements were carried out on a unique laboratory installation, that allows kinetics examination of solid fuels gasification with steam at wide range of pressures, via using thermovolumetric method. Formation rates of main gaseous products were determined, moreover, composition of post-reaction gas, as well as biomass conversion degree depending on the temperature were specified. Kinetic parameters of gasification were calculated and series of kinetic models were used to their designation ie Isoconvesional method, Integrated Core Model (ICM), Grain Model (GM) and Random Pore Model (RPM).

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Experimental investigation on hydrogen production from biomass gasification in interconnected fluidized beds

Cited by 128 publications

References 18 publications

Kinetics and Performance of Raw and Torrefied Biomass in a Continuous Bubbling Fluidized Bed Gasifier

Kinetics and Performance of Raw and Torrefied Biomass in a Continuous Bubbling Fluidized Bed Gasifier

Feasible utility of inorganic remains from potable water purification process in chemical looping combustion studied in TG

Kinetics examination of pressurised steam gasification of beech wood

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