Gaseous organic emissions during air gasification of woody waste: effect of bed agglomeration/defluidization

Kuo, Jia‐Hong; Wey, Ming‐Yen; Lian, Yi-Hui; Samaksaman, Ukrit

doi:10.1016/j.fuproc.2014.07.008

Cited by 11 publications

(5 citation statements)

References 31 publications

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“…The destruction and removal efficiency increases with reaction rates and diffusion coefficients depend on hydrodynamics of the reactor (Nowak et al 2011). In contrast, a binary-sized mixture influenced the fluidization quality of a (Kuo et al 2014) and led to the formation of BTEX and PAHs as seen at a higher ratio of S a /S f (1.5/1 and 2.0/1) of fluidized bed mode. Total concentration of BTEX and PAHs detected in bottom ash samples were in the ranges of 0.63-3.98 mg/kg in fixed bed and 1.29-3.36 mg/kg in fluidized bed modes.…”

Section: Resultsmentioning

confidence: 99%

“…The concentrations of BTEX and 16-PAHs were analyzed by a gas chromatography flame ionization detector (GC/FID) (Agilent 6890N). The details of the analysis method could be found in previous studies (Kuo et al 2014;Samaksaman et al 2015). Furthermore, ash samples were subjected to digestion with a mixture of acids (HCl/HNO 3 = 1:2) using a microwave-assisted digestion (CEM Mars 5).…”

Section: Analysis and Characterizationmentioning

confidence: 99%

See 1 more Smart Citation

Effect of co-contaminated soil mixtures as fixed/fluidized bed media on pollutants emission under thermal treatment

Samaksaman

Kuo

Peng

et al. 2015

Int. J. Environ. Sci. Technol.

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Thermal treatment of soil polluted by lube oil and heavy metals (cadmium, chromium, copper, and lead) was carried out by using a laboratory-scale incinerator. The effect of co-contaminated soil mixtures as fixed/fluidized bed media was studied with different ratios of sand bed amount to soil feeding. Additionally, the effect of soil moisture content on incineration system was further investigated. The reduction in air input altered the mode of fluidized bed to fixed bed which resulted in an increase in organic pollutants such as benzene, toluene, ethylbenzene, xylene, and polycyclic aromatic hydrocarbons. The combustion efficiency of fixed bed mode was observed to be relatively high at a lower ratio of sand bed amount to soil feeding, whereas high combustion efficiency was found in fluidized bed mode at a higher ratio of sand bed amount to soil feeding. Much higher concentration of organic pollutants in both gas phase and bottom ash is found under a higher soil moisture content. In addition, the increase in moisture content has resulted in an increase in lead, cadmium, and chromium in fly ash while copper was decreased. An important consideration is that the partitioning of heavy metals was randomly distributed in particle sizes of bottom ash. The highest concentration of heavy metals was deposited on fine-sized particle. The distribution of heavy metals in medium-sized and coarse-sized particles to form eutectic species might be produced by the soil-sand aggregation.

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Section: Resultsmentioning

confidence: 99%

Section: Analysis and Characterizationmentioning

confidence: 99%

Effect of co-contaminated soil mixtures as fixed/fluidized bed media on pollutants emission under thermal treatment

Samaksaman

Kuo

Peng

et al. 2015

Int. J. Environ. Sci. Technol.

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“…This can be explained that CaCO3 generated by CaO carbonation and SiO2 particles to form calcium silicate change the morphology of the particles [28]. According to the research conducted by Kuo et al [40], SiO2+CaO performed a better inhibition effect on ash sintering compared with silica itself as the bed material. Moreover, the released heat from CaO carbonation could be one of the reasons for inhibiting the growth of silica particle size since it can reduce the gasification temperature and thus reduce the ash sintering degree.…”

Section: Sem-edx Analysis Of Reacted Samplesmentioning

confidence: 99%

Autothermal CaO looping biomass gasification to increase process energy efficiency and reduce ash sintering

Zhang

Gao

Wang

et al. 2020

Fuel

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Biomass gasification is considered as a promising renewable energy technology to address climate change caused by greenhouse gas emissions and produce portable and clean energy products. However, biomass must be combusted in the traditional gasification to maintain the process, while excessive gasification temperature will lead to ash sintering, resulting in the shutdown of the equipment. Autothermal biomass gasification is directly maintained by carbonation reaction, which can maximize the production of combustible gas and reuse carbon dioxide in the flue gas. Lab-scale results indicated that similar H2 yield can be obtained via Auto-CaL-Gas technology at lower operating temperatures. Moreover, H2 concentration increased by 23.29% at 650℃with CaO than at 750℃ without CaO, and 14.11% at 550℃ with CaO than at 650℃ without CaO, respectively, thus saving energy consumption and improving total energy efficiency in the biomass gasification process.

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“…To obtain the fixed bed density (Static or settled bed), the values calculated previously were replaced in Equation (19).…”

Section: Fixed Bed Densitymentioning

confidence: 99%

“…In the case of the reactor design, several studies analyzed how is the behavior of the BFB gasification process is and how the reactor design is affected by bed material [15][16][17], bed agglomeration [18][19][20][21][22], gasifying agent [9,10,[23][24][25][26], use of catalysts [20,27,28], hydrodynamics [2,29], biomass segregation [5,30], kind and size of biomass [25,[30][31][32][33][34][35], temperature conditions [32,36], or gasification process [37][38][39]. Results from the experimental test were also studied in [23,24,33,34,[40][41][42], and finally, other publications integrated models and tests to validate simulations [43,44].…”

Section: Introductionmentioning

confidence: 99%

Empirical Design, Construction, and Experimental Test of a Small-Scale Bubbling Fluidized Bed Reactor

et al. 2021

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The methods currently used for designing a fluidized bed reactor in gasification plants do not meet an integrated methodology that optimizes all the different parameters for its sizing and operational regime. In the case of small-scale (several tens of kWs biomass gasifiers), this design is especially complex, and, for this reason, they have usually been built in a very heuristic trial and error way. In this paper, an integrated methodology tailoring all the different parameters for the design and sizing of a small-scale fluidized bed gasification plants is presented. Using this methodology, a 40 kWth biomass gasification reactor was designed, including the air distribution system. Based on this design, with several simplified assumptions, a reactor was built and commissioned. Results from the experimental tests using this gasifier are also presented in this paper. As a result, it can be said the prototype works properly, and it produces syngas able to produce thermal energy or even electricity.

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Gaseous organic emissions during air gasification of woody waste: effect of bed agglomeration/defluidization

Cited by 11 publications

References 31 publications

Effect of co-contaminated soil mixtures as fixed/fluidized bed media on pollutants emission under thermal treatment

Effect of co-contaminated soil mixtures as fixed/fluidized bed media on pollutants emission under thermal treatment

Autothermal CaO looping biomass gasification to increase process energy efficiency and reduce ash sintering

Empirical Design, Construction, and Experimental Test of a Small-Scale Bubbling Fluidized Bed Reactor

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