Experimental study on the ash behaviour in combustion of pelletized residual agricultural biomass

Royo, Javier; Canalís, Paula; Quintana, David; Díaz-Ramírez, Maryori C.; Sin, Ana; Rezeau, Adeline

doi:10.1016/j.fuel.2018.11.054

Cited by 29 publications

(20 citation statements)

References 60 publications

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“…Considering the pellet quality from agricultural residue feedstock, the first thing that can be observed is that it represents the topic of the majority of the investigated papers. This shows the great importance given by scientific research to the issue of agricultural residue valorization through densification and use as biofuels [59][60][61][62].…”

Section: Pure Feedstock For Pellet Productionmentioning

confidence: 99%

Pellet Production from Woody and Non-Woody Feedstocks: A Review on Biomass Quality Evaluation

Picchio

Latterini²,

Venanzi

et al. 2020

Energies

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Forest and agricultural biomass are important sources of renewable and sustainable fuel for energy production. Their increasing consumption is mainly related to the increase in global energy demand and fossil fuel prices but also to the limited availability of petroleum and the lower environmental impact of these biomass compared with other non-renewable fuels. In particular, the pellet sector has seen important developments in terms of both production and the number of installed transformation plants. In addition, pellet production from non-woody biomass is increasing in importance. One of the fundamental aspects for the correct and sustainable use of a biofuel is evaluation of its quality. This is even more important when dealing with pellet production, considering the broad spectrum of possible raw materials for pelletizing. Considering the significant number of papers dealing with pellet quality evaluation and improvement in the last decade, this review aims to give the reader an overall view of the most current knowledge about this large and interesting topic. We focused on pellets of agricultural and forestry origin and analyzed papers regarding the specific topic of pellet quality evaluation and improvement from the last five years (2016–2020). In particular, the review findings are presented in the following order: the influence of different agro-forest management systems on pellet quality; analysis of pellets from pure feedstocks (no blending or binders); the influence of blending and binders on pellet quality; and the influence of pre and post treatments. Finally, a brief discussion about actual research lacks in this topic and the possibilities for future research are presented. It is important to underline that the present review is focused on the influence of the biomass characteristics on pellet quality. The effects of the process parameters (die temperature, applied pressure, holding time) on pellet features are not considered in this review, because that is another very large topic deserving a dedicated paper.

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Section: Pure Feedstock For Pellet Productionmentioning

confidence: 99%

Pellet Production from Woody and Non-Woody Feedstocks: A Review on Biomass Quality Evaluation

Picchio

Latterini²,

Venanzi

et al. 2020

Energies

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“…This trend is in line with the study by Cupping et al [7] which verified that forestry species have much lower ash content comparing to agricultural species. Royo et al [51] also refers to this difference in values between agricultural and forest residues, emphasizing that one of the great differences between these two types of biomass for energy use is related to the characteristics of its ashes (quantity and composition) which increase certain problematic phenomena during combustion, among them bottom ash sintering and fly ash deposition.…”

Section: Elemental Analysis (Chons) and Ashesmentioning

confidence: 99%

Residual Agroforestry Biomass–Thermochemical Properties

Enes

Aranha

Fonseca

et al. 2019

Forests

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Research Highlights: Biomass from Mediterranean agroforestry vegetation may be a potential source of renewable energy. However, due to the high heterogeneity of this type of resource, the study of its characteristics becomes necessary for its efficient use. Objectives: The aim of this study was to evaluate the thermal and chemical properties of 14 different kinds of agroforestry biomass groups: shrubs, forest, and agricultural wastes. Materials and Methods: The higher heating value (HHV), the elemental analysis (C, H, O, N, S), ashes, mineral elements (Na, K, Ca, Mg, and P), trace elements (Mn, Fe, Zn, Ni, Cu, Cr, and Cd) and halogen elements (F and Cl) were quantified and compared with CEN/TS 147775 and CENS/TS 14961 standards, looking forward to future use for energy purposes, namely through combustion processes, as an alternative to fossil fuels. Results: The shrubs present the highest values of higher heating value (20.5 MJ kg−1), followed by the forest wastes (19.2 MJ kg−1) and the lowest in the agricultural wastes (18.5 MJ kg−1). Concerning the elemental analysis, the difference between groups C, H, and O are very small and not statistically significant, while for N, S and ashes values are higher in agricultural than shrubs and forestry wastes. The same tendency was found for the mineral nutrients. For the trace elements, the lowest content of Mn, Fe, and Zn is found in agricultural, Ni, and Cr content in the shrubs and Cu in the forest wastes. The halogen elements are present in greater amount in shrubs than agricultural and forest wastes. Conclusions: Although the high values of the halogen elements which may raise sintering problems and corrosive effect on metal parts in furnace and boiler, in general the shrubs biomass are those with better characteristics for energy uses, namely through combustion processes.

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“…Contrary to the grass-based pellets, lp50 has the possibility of being used in commercial devices with the incorporation of processes during the manufacturing that improve their properties. work helps researchers make choices related to the design and operation of facilities for the utilization of agricultural residues biomass [8]. Verma et al, due to a growing market for sunflower husks in Belgium, Ukraine, and Poland, decided to compare them with other fuels (wood, apple pomace, peat .…”

mentioning

confidence: 99%

Viability Evaluation of Three Grass Biofuels: Experimental Study in a Small-Scale Combustor

et al. 2019

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This experimental study focusses on the viability of three low-grade biofuels in small-scale biomass units of 7-12 kW The tested materials were homemade grass pellets (gp1 and gp2) and a mixture of leaves and woody pellets (lp50) that were made without binders and completely characterized in terms of their chemical and physical properties (proximate analysis, elementary composition, ash content, flowability, etc.). The results obtained with the non-commercial fuels were compared with commercial wood pellets (wp). The viability study comprised the operational parameter influences, such as primary and secondary airflow, fuel consumption, etc., together with the impact of those parameters on the main problems in combustion (concentration and particle distribution, fouling and slagging). The results revealed that the biomass whose behavior during combustion induced fewer particulate emissions and deposits was the mixed fuel, made of 50% leaf + 50% wood pellet (lp50). Contrary to the grass-based pellets, lp50 has the possibility of being used in commercial devices with the incorporation of processes during the manufacturing that improve their properties. work helps researchers make choices related to the design and operation of facilities for the utilization of agricultural residues biomass [8]. Verma et al., due to a growing market for sunflower husks in Belgium, Ukraine, and Poland, decided to compare them with other fuels (wood, apple pomace, peat . . . ) in a residential pellet boiler, reaching efficiency values of up to 92.4% in the best case scenario [5,9]. Sampson et al. used biomass from agriculture, such as switchgrass and energy crops, and they verify the viability of their production with low cost and reduction of greenhouse effect because they have an important potential to displace fossil fuels [10]. Gonzalez et al. investigated the combustion of pellets made with different agricultural residues (forest, tomato plant, cardoon, and olive bone) for domestic heat production. They also investigated the mixture of these fuels in different percentages. In this study some combustion parameters have been analyzed and it was determined that the behavior of the residues is similar to that of the forest pellet. Besides, they verified that the optimum residue mixture was forest (25%) and tomato (75%) [11]. Regueiro et al. analyzed the viability of three non-commercial fuels (barley pellet, leaf pellet (100%), and a mixture with leaf pellet (25%) and wood pellet (75%)) through the study of different combustion parameters. They concluded that the first two options were a bad alternative. Nevertheless, the last one could be a good an option, although its commercialization it needs the incorporation of additives to improve the fuel properties. The particulate matter (PM) emissions for the low-grade biofuels were between 257 mg/Nm 3 and 325 mg/Nm 3 , 17 mg/Nm 3 and 43 mg/Nm 3 , and 22 mg/Nm 3 and 53 mg/Nm 3 for pellet made of barley, leaf, and a mixture of 25% leaf/-75% wood, respectively [12]. Andreasen and Larsen studie...

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Experimental study on the ash behaviour in combustion of pelletized residual agricultural biomass

Cited by 29 publications

References 60 publications

Pellet Production from Woody and Non-Woody Feedstocks: A Review on Biomass Quality Evaluation

Pellet Production from Woody and Non-Woody Feedstocks: A Review on Biomass Quality Evaluation

Residual Agroforestry Biomass–Thermochemical Properties

Viability Evaluation of Three Grass Biofuels: Experimental Study in a Small-Scale Combustor

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