Synergy in devolatilization characteristics of lignite and hazelnut shell during co-pyrolysis

Haykırı-Açma, H.; Yaman, Serdar

doi:10.1016/j.fuel.2006.07.005

Cited by 142 publications

(63 citation statements)

References 17 publications

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“…The interaction between coal and biomass during thermal co-conversion is an issue yet to be solved; some devolatilization and pyrolysis results of coal and biomass blends have revealed no or very little synergy between the two fuels [44][45][46][47][48][49][50][51][52][53][54][55][56] while others have revealed significant synergy [43,[57][58][59][60][61][62][63][64][65][66][67][68][69][70][71]. It is important to segregate the synergistic effect from the catalytic effect engendered by biomass mineral matters; most of the studies that found synergistic effects between the two fuels failed to segregate these two phenomena.…”

Section: Feedstockmentioning

confidence: 99%

“…Cordero et al [68] also showed enhancement in desulfurization when blending coal with different types of biomass during co-pyrolysis compared to coal pyrolysis. Haykiri-Acma and Yaman [57] showed that the addition of hazelnut shell to lignite contributed to the sulfur fixing potential of the resulting char in the form of CaS and CaSO 4 during co-pyrolysis of these feedstocks.…”

Section: Devolatilization/pyrolysismentioning

confidence: 99%

“…However, the existence of non-catalytic synergistic effect remains controversial. Some researchers [43,[57][58][59][60][61][62][63][64][65][66][67][68][69][70][71][101][102][103][104][105][106][107][108] have shown evidence of synergy between biomass and coal while others [44][45][46][47][48][49][50][51][52][53][54][55][56] found no evidence of synergy. Trevor and Kandiyoti [109] pointed out that the way biomass components are intermeshed affects the distribution of pyrolysis products.…”

Section: Synergy Through Other Mechanismsmentioning

confidence: 99%

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A Review of Thermal Co-Conversion of Coal and Biomass/Waste

2014

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Abstract:Biomass is relatively cleaner than coal and is the only renewable carbon resource that can be directly converted into fuel. Biomass can significantly contribute to the world's energy needs if harnessed sustainably. However, there are also problems associated with the thermal conversion of biomass. This paper investigates and discusses issues associated with the thermal conversion of coal and biomass as a blend. Most notable topics reviewed are slagging and fouling caused by the relatively reactive alkali and alkaline earth compounds (K 2 O, Na 2 O and CaO) found in biomass ash. The alkali and alkaline earth metals (AAEM) present and dispersed in biomass fuels induce catalytic activity during co-conversion with coal. The catalytic activity is most noticeable when blended with high rank coals. The synergy during co-conversion is still controversial although it has been theorized that biomass acts like a hydrogen donor in liquefaction. Published literature also shows that coal and biomass exhibit different mechanisms, depending on the operating conditions, for the formation of nitrogen (N) and sulfur species. Utilization aspects of fly ash from blending coal and biomass are discussed. Recommendations are made on pretreatment options to increase the energy density of biomass fuels through pelletization, torrefaction and flash pyrolysis to reduce transportation costs.

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Section: Feedstockmentioning

confidence: 99%

Section: Devolatilization/pyrolysismentioning

confidence: 99%

Section: Synergy Through Other Mechanismsmentioning

confidence: 99%

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A Review of Thermal Co-Conversion of Coal and Biomass/Waste

2014

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“…Research on pyrolysis of coal/biomass blends is a relatively new field; however, some researchers have conducted coal and biomass blends with pyrolysis behavior (Biagini et al, 2002;Yanfen & Xiaoqian, 2010). Coal/biomass blends of Turkish lignite from the Elbistan region and hazelnut shell showed a significant synergy in terms of devolatilization yield at temperatures of between 400 and 600 K; however, they lack activation energy synergy (Haykiri-Acma & Yaman, 2007). Likewise, pyrolysis using thermogravimetric analysis (TGA) behavior of palm oil biomass (kernel shell, empty fruit bunches, and mesocarp fiber), Malaysian sub-bituminous coal (Mukah Balingian), and their respective blends have also been revealed (Idris et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Thermal Evolution Profile Analysis for Pyrolysis of Coal – Acacia Mangium Wood Blends

Barlin¹,

Gunawan²,

Arifin³

et al. 2016

IJTech

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Due to critical environmental issues, increasing future energy supplies and decreasing reserved energy resources are currently the subject of comprehensive research. The use of biomass as a renewable energy resource may be helpful in solving current energy shortfalls, particularly for countries that have abundant biomass resources. In this study, pyrolysis of coal, Acacia Mangium wood, and their respective blend samples were investigated using proximate analysis and Thermogravimetric (TG-DTG). A mixture of coal and A. Mangium wood with a weight ratio 100:0, 90:10, 50:50, 10:90, and 0:100, were used and non-isothermal conditions at a constant heating rate of 5, 15, and 30°C/min were applied. Thermal evolution profile analysis of the pyrolysis process confirms that the reactivity of the fuel increased with the increasing proportion of the biomass in the fuel. The reactivity and maximum temperatures increased with the increasing heating rates. Proximate analysis showed the potential of biomass of A. Mangium wood to be used as a mixture with coal in terms of low ash and high volatile matter content.

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“…during the pyrolysis process, the reactivity or thermal characteristics of a mixture of coal and other fuels achieved through co-pyrolysis can be predicted by an algebraic calculation using the blending ratio of the other fuels if the reactivities or thermal characteristics of the individual coal and other fuels are known [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. If the experimental results are different from the calculated values, it can be said that synergy exists.…”

Section: Introductionmentioning

confidence: 99%

A comprehensive study on co-pyrolysis of bituminous coal and pine sawdust using TG

Jeong

Seo

Park

et al. 2015

J Therm Anal Calorim

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A sample consisting of woody biomass and bituminous coal was pyrolyzed in a lab-scale furnace in a nitrogen atmosphere with the temperature increasing by different heating rates of 5, 10, and 50°C min -1 until the furnace wall temperature reached 900°C. Five blending ratios (BRs) of coal-biomass were tested. For each BR, the mass loss of the sample and mole fractions of the gaseous species evolved from the sample were measured using a thermogravimetry (TG) and a real-time gas analyzer (GA). Reactivity, product yield, and activation energy were considered as index parameters to co-pyrolysis. While synergy (the difference between the experimental data and calculated results obtained using an additive model) of the reactivity of co-pyrolysis was observed only at specific temperatures, the TG results showed synergy at temperatures between 450 and 500°C compared to between 450 and 600°C seen with the GA method for all pyrolyzed gases, and especially between 350 and 650°C for H 2 . While there was no synergy in the char yield of the copyrolysis, the liquid and total gas exhibited synergy for all three BRs. The pre-exponential factors and the activation energies of BRs of 0.25, 0.5, and 0.75 were obtained using a kinetic study of co-pyrolysis.

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Synergy in devolatilization characteristics of lignite and hazelnut shell during co-pyrolysis

Cited by 142 publications

References 17 publications

A Review of Thermal Co-Conversion of Coal and Biomass/Waste

A Review of Thermal Co-Conversion of Coal and Biomass/Waste

Thermal Evolution Profile Analysis for Pyrolysis of Coal – Acacia Mangium Wood Blends

A comprehensive study on co-pyrolysis of bituminous coal and pine sawdust using TG

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