Combustion characteristics of cotton stalk in FBC

Sun, Zhen; Shen, Jing; Jin, Baosheng; Wei, Liyan

doi:10.1016/j.biombioe.2010.01.019

Cited by 45 publications

(18 citation statements)

References 22 publications

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“…The integral Coats-Redfern method was employed for mathematical analysis, which has been successfully employed for investigations of the pyrolysis kinetic parameters (Liang and Kozinski 2000;Vamvuka et al 2003;Sun et al 2010). The degradation rate of biomass is defined as the equation of an Arrhenius type kinetic model, and the first-order-reaction-based Arrhenius theory is commonly employed in the kinetic analysis of pyrolysis (Rath and Staudinger 2001).…”

Section: Parameters Of Reaction Kineticsmentioning

confidence: 99%

“…The development of a mathematical model predicting the qualities of gaseous products in the processes of gasification and pyrolysis requires the knowledge of the thermal pyrolysis kinetics of biomass (Kumar et al 2008). Researchers have carried out numerous studies on the thermo-physical characterization of different biomass feedstocks, such as corn stover (Kumar et al 2008), cotton stalk (Munir et al 2009;Sun et al 2010;Zhang et al 2016), pine sawdust (Gao et al 2013), apple pomace (Baray et al 2014), sugar cane bagasse (Munir et al 2009;Meng et al 2013), hardwood residues (Mazlan et al 2015), wood lignin (Liu et al 2008), soybean stalk and sorghum stalk (Zhang et al 2016), etc. In addition, the composition and content of the main biomass component can significantly affect the thermal decomposition during the biomass pyrolysis (Zhang et al 2016).…”

Section: Introductionmentioning

confidence: 99%

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Research on the Thermo-Physical Properties of Corncob Residues as Gasification Feedstock and Assessment for Characterization of Corncob Ash from Gasification

Yao

Liang

2016

BioResources

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Harnessing energy from biomass is environmentally friendly because of the essentially zero net CO2 impact. As a common agricultural byproduct, corncobs are abundant in quantity. This study was carried out to examine the thermo-physical properties of corncobs and characterize the properties of corncob ash produced from gasification, in order to provide a basis for transforming it into value-added products. The results showed that the pyrolysis of corncobs followed a three-step, stepwise mechanism. Activation energies calculated by the Coats-Redfern method at heating rates of 5, 10, and 20 °C/min were 79.08, 76.73, and 75.78 kJ·mol -1 , respectively, implying that the corncobs could be decomposed easily at high heating rates. The emissions of CO, CO2, CH4, H2, H2O, and O2 during pyrolysis corresponded well with thermal curves. Corncob ash could be a good fertilizer because of its high contents of K, P, and Ca. The high SiO2 content makes the corncob ash suitable for ceramics and blended cement concrete. Sylvite (KCl) and quartz (SiO2) were the two major crystal phases in the corncob ash. Relatively large particles of unburnt carbon residues in the ash indicated that low-cost adsorbent could be developed from these carbon residues.

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Section: Parameters Of Reaction Kineticsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Research on the Thermo-Physical Properties of Corncob Residues as Gasification Feedstock and Assessment for Characterization of Corncob Ash from Gasification

Yao

Liang

2016

BioResources

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“…The porosity of the coffee husk is similar to the value of 63% presented by Silva et al (1998). The porosity of the cotton stalk is within the range of 71.74-78.28% presented by Sun et al (2010).…”

Section: Porositymentioning

confidence: 64%

“…Some of these materials are used for making pulp and paper (Hedjazi et al, 2009), as a roughage in animal feeding (Dong et al, 2008), producing liquid fuels (Wang et al, 2012), as thermal insulation materials (Zhou et al, 2010), as an adsorbent (Brandão et al, 2010), as microporous materials (Silva et al, 1998) and as an fermentation medium (Mazutti et al, 2010). However, these materials are renewable and can be used as energy sources to replace fossil fuels in thermochemical conversion processes such as combustion and gasification (Williams et al, 2012;Yuan et al, 2012;Kumar et al, 2008;Sun et al, 2010;Zabaniotou et al, 2010). The high cost of fossil fuel, limited and uncertain supply and impact on environment make the utilization of biomass as a source of energy very attractive.…”

Section: Introductionmentioning

confidence: 99%

Availability and Physical Properties of Residues From Major Agricultural Crops for Energy Conversion Through Thermochemical Processes

Zhang¹,

Ghaly²,

Li³

2012

American Journal of Agricultural and Biological Sciences

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Plant residues from the major agricultural crops (wheat, rice, corn, soybean, sugarcane, coffee and cotton) are abundantly available renewable resources that can be used to supply energy through thermochemical conversion processes. The available amounts of plant residues from these crops and their physical properties (moisture content, particle size, bulk density and porosity) were determined. The annual residues from the wheat, rice, corn, soybean, sugarcane, coffee and cotton were 763.42, 698.10, 1729.92, 416.62, 16.85, 4.01 and 107.13 million tons, respectively. The total amount of plant residues was estimated at 3736.05 million tons with total energy content of 66.92 EJ. These residues can replace 2283.52 million tons of coal, 1551.78 million tons of oil and 1847.63 million m 3 of natural gas. The moisture contents were 7. 79, 6.58, 6.40, 7.30, 8.15, 7.86 and 7.45% for the wheat straw, rice straw, corn stalk, soybean stalk, sugarcane stalk, coffee husk and cotton stalk, respectively. The corn stalk and sugarcane stalk had a convex particle size distribution, the soybean stalk and cotton stalk had a concave particle size distribution, the wheat straw and rice straw had an increasing trend particle size distribution and the coffee husk had a decreasing trend particle size distribution. The average particle sizes for the wheat straw, rice straw, corn stalk, soybean stalk, sugarcane stalk, coffee husk and cotton stalk were 0.42, 0.40, 0.49, 0.43, 0.55, 0.67 and 0.38 mm, respectively. The average bulk density was 160.75, 166.29, 127.32, 242.34, 110.86, 349.06 and 230.55 kg m -3 for the wheat straw, rice straw, corn stalk, soybean stalk, sugarcane stalk, coffee husk and cotton stalk, respectively. The average porosity was 51. 25, 83.20, 58.51, 68.03, 77.58, 64.85 and 74.55% for the wheat straw, rice straw, corn stalk, soybean stalk, sugarcane stalk, coffee husk and cotton stalk, respectively. The results obtained from this study indicate that different plant residues have different physical properties.

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“…Several studies have been conducted on the combustion of biomass waste materials in fluidized bed combustors in energy production. The researches mainly focused on the combustion of varies agricultural residue biomass types: rice husk [8]- [13], rice straw and wheat straw [14]- [16], palm kernel shell [17], sunflower shell [18], peanut shell [19], cotton stalk [20], and cedar pellet. The fluidized bed combustion was also used to burn woody biomass feed stocks, such as sawdust [21]- [23] and wood [15], [24]- [26].…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on Axial Temperature Distribution of Combustion of Dewatered Poultry Sludge in Fluidized bed combustor

Abbas

Sulaiman

Aris

2016

MATEC Web of Conferences

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Abstract.A laboratory scale bubbling fluidized bed combustor was designed and fabricated to study the combustion of dewatered poultry sludge at different operational parameters. This paper present a study on the influence of equivalent ratio, secondary to primary air ratio and the fuel feed rate on the temperature distribution along the combustor. The equivalent ratio has been changed between 0.8 to 1.4% under poultry sludge feed rate of 10 kg/h and from 0.8 to 1 under poultry sludge feed rate of 15 kg/h. The secondary to primary air ratio was varied from 0.1 to 0.5 at 0.65 m injection height and 1.25 equivalent ratio. The results showed that these factors had a significant influence on the combustion characteristics of poultry sludge. The temperature distribution along the combustor was found to be strongly dependent on the fuel feed rate and the equivalent ratio and it increased when these two factors increased. However, the secondary air ratio increased the temperature in the lower region of the combustor while no significant effect was observed at the upper region of the combustor. The results suggested that the poultry sludge can be used as a fuel with high thermal combustor efficiency.

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Combustion characteristics of cotton stalk in FBC

Cited by 45 publications

References 22 publications

Research on the Thermo-Physical Properties of Corncob Residues as Gasification Feedstock and Assessment for Characterization of Corncob Ash from Gasification

Research on the Thermo-Physical Properties of Corncob Residues as Gasification Feedstock and Assessment for Characterization of Corncob Ash from Gasification

Availability and Physical Properties of Residues From Major Agricultural Crops for Energy Conversion Through Thermochemical Processes

An Experimental Study on Axial Temperature Distribution of Combustion of Dewatered Poultry Sludge in Fluidized bed combustor

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