Ash and chlorine deposition during co-combustion of lignite and a chlorine-rich Canadian peat in a fluidized bed – Effects of blending ratio, moisture content and sulfur addition

Shao, Yuanyuan; Xu, Chunbao; Zhu, Jesse; Preto, Fernando; Wang, Jinsheng; Tourigny, Guy; Badour, Chadi; Li, Hanning

doi:10.1016/j.fuel.2011.12.020

Cited by 21 publications

(18 citation statements)

References 35 publications

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“…Therefore, determination of the chlorine content in the analysed material was carried out in the subsequent stage of the investigations. The chlorine content in the analysed types of biomass was in the range of 0.10-0.42% (Table 4), which is in agreement with the studies of Shao et al (2012aShao et al ( , 2012b who compared the chlorine content of six sorts of feedstock -woody biomass, bark, straw, willow, reed canary grass, peat with other fuels for power/heat generation. The highest chlorine content was detected in the brome grass sample (0.42%) and the lowest in the sorghum and miscanthus samples (0.10%).…”

Section: Resultssupporting

confidence: 89%

“…The 'Bamar' pellet exhibited the highest sodium content of all the samples analysed. The silica content was in the range of 43-63%, potassium 17-30%, and chlorine 1.2-6.2% according to Veijonen et al (2000), Arvelakis et al (2001), Armesto et al (2003), Aho et al (2004), and Shao et al (2012b). Interestingly, considerable contents of calcium, magnesium, phosphorus, and potassium were noted in the ashes yielded by biomass combustion.…”

Section: Resultsmentioning

confidence: 88%

“…However, in this study, the ash content of the biomass did not exceed 8.6% in the analytical conditions. Shao et al (2012aShao et al ( , 2012b have found that biomass materials are commonly moist (17-25 wt% straw; 15-20 wt% reed canary grass (spring harvested)) and strongly hydrophilic as well as non-friable, which poses difficulties in fuel preparation, storage, and delivery. This can affect ash deposition during combustion.…”

Section: Resultsmentioning

confidence: 99%

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Comparison of selected parameters of biomass and coal

Lalak¹,

Martyniak²,

Kasprzycka³

et al. 2016

International Agrophysics

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As a fuel, biomass differs in its properties from fossil fuels and acquisition thereof for energy purposes is limited; hence, the ongoing search for new bioenergetically useful plants. The article presents the results of physical and chemical analyses of seven species of perennial grasses: tall wheatgrass, tall wheatgrass ‘Bamar’, brome grass, tall fescue ecotype, reed canary grass, giant miscanthus, and sorghum. The research involved technical and elemental analysis as well as analysis of the ash composition performed in order to determine their potential use for combustion process. The measurement results were compared with those obtained for hard coal and agricultural biomass, which is widely used in the energy industry. The results suggest that perennial grasses can successfully be combusted with similar performance to coal if burned in appropriate combustion installations.

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 99%

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Comparison of selected parameters of biomass and coal

Lalak¹,

Martyniak²,

Kasprzycka³

et al. 2016

International Agrophysics

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“…A difference from the coal combustion was noted that there was a clear iron content increase when biomass was cocombusted with coal. According to the increasing chlorine contents, It was speculated that some of chlorides in fly ashes might deposit on the cold surface of the probe as used in this study, thereby causing high temperature corrosion in the combustor (Hansen et al 1999, Shao et al 2012. Thus, the iron on the sampling probe was transformed into Fe2O3 and collected into ash samples, which led to the significant Fe contents increasing in EDS results.…”

Section: Peer-reviewed Articlementioning

confidence: 87%

Fouling and Slagging Characteristics during Co-combustion of Coal and Biomass

Zhu¹,

Yang²,

Chen³

et al. 2017

BioResources

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The effects of different kinds (cotton stalk, rice husk, and sawdust) and proportions (0%, 10%, 20%, and 30% based on weight) of biomass and operating conditions (temperature and excess air coefficient) were evaluated relative to the ash deposition characteristics during the cofiring of Huang Ling (HL) coal with biomass. The experiments were performed in a drop-tube furnace. The chemical compositions and mineral phase characteristics of the collected ash particles were analyzed using scanning electron microscopy with energy dispersive Xray (SEM-EDX) and X-ray diffraction (XRD), respectively. The results showed that the most severe agglomeration, from co-firing coal with cotton stalk, was due to the higher content of alkali metals, especially K. The amount of K in the ash increased with an increasing proportion of cotton stalk, and ultimately, agglomeration was more serious. When the combustion temperature increased from 1050 °C to 1300 °C, the dystectic solid compounds were transformed into eutectic compounds. The increased excess air coefficient accelerated the sulfur reaction, but did not relieve the heavy sintering. Consequently, limiting the content of biomass in the fuel blends, maintaining a lower combustion temperature, and a suitable level of excess air were determined to be necessary for the co-firing of coal and biomass.

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“…Mansaray and Ghaly (1997) and Chen et al (2009) reported that an increase in moisture content of the rice residues decreased their heating value, which in turn reduced the conversion efficiency and performance of the system, because a large amount of energy would be used for vaporization of the fuel moisture during the conversion processes. A dry material is thus preferred for efficient storage and combustion, whereas a certain amount of moisture in the fuel is beneficial for gasification or combustion (Shao et al, 2012;Kuprianov et al, 2010).…”

Section: Ajasmentioning

confidence: 99%

Physical Properties of Rice Residues as Affected by Variety and Climatic and Cultivation Onditions in Three Continents

Zhang

Ghaly

Li³

2012

American Journal of Applied Sciences

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Rice husk and straw are by-products of rice cultivation and processing industry and can be used as an energy source. Proper understanding of the physical properties of rice residues is necessary for utilizing them in thermochemical conversion processes such as gasification and combustion. The physical properties (moisture content, particle size, bulk density and porosity) of rice husks and straws obtained from three countries (Egypt, Cuba and China) were evaluated in this study. The moisture contents of rice husks and straws were in the ranges of 4.60-6.07% and 6.58-6.92%, respectively. For all rice varieties tested, the moisture content of the straws was higher than these of the husks. The particle sizes of rice husks and straws were in the ranges of 0.212-0.850 mm and 0-0.710 mm, respectively. All the rice husk varieties had a normal distribution of particle size around the main value of 0.6 mm while the particle size distribution for the rice straws showed a decreasing trend, the larger the particle size the higher was the weight percentage. The bulk density of rice husks and straws were in the ranges of 331.59-380.54 kg m -3 and 162. 03-194.48 kg m -3 , respectively. The bulk density values of rice straws were lower than those of rice husks. A negative linear relationship between the bulk density and the average particle size was observed for rice husks and straws. The porosity of rice husks and straws were in the ranges of 63.64-68.94% and 71.21-85.28%, respectively. A positive linear relationship between the porosity and the average particle size was observed for rice husks and straws. Also, a negative linear relationship between the porosity and the bulk density was observed. The results obtained from this study showed significant differences in the physical properties of the rice husks and straws collected from different countries (located in three different continents). These differences may be due to variations in climatic conditions, soil type, methods of cultivation and type of fertilizer used. The results also indicated that different parts of rice plant (straw and husk) had different physical properties. Also, significant differences were observed among rice varieties even though they were grown under the same climatic conditions using same soil type and cultivation method as in the case of the long and short grain rice variety of Egypt.

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Ash and chlorine deposition during co-combustion of lignite and a chlorine-rich Canadian peat in a fluidized bed – Effects of blending ratio, moisture content and sulfur addition

Cited by 21 publications

References 35 publications

Comparison of selected parameters of biomass and coal

Comparison of selected parameters of biomass and coal

Fouling and Slagging Characteristics during Co-combustion of Coal and Biomass

Physical Properties of Rice Residues as Affected by Variety and Climatic and Cultivation Onditions in Three Continents

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