Fouling tendency of ash resulting from burning mixtures of biofuels. Part 1: Deposition rates

Theis, Mischa; Skrifvars, Bengt-Johan; Hupa, Mikko; Tran, Honghi

doi:10.1016/j.fuel.2005.10.010

Cited by 129 publications

(55 citation statements)

References 20 publications

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“…Following the previous scheme, the wp results can be compared with other In all cases, the fuel properties are the determinant parameter for the fouling rate, when fuels with very dissimilar properties are analyzed [33]. The fuel composition is related not only to the total amount of fouling but also to the percentage of each subtype (adhered mass + deposited mass) over the heat exchanger.…”

Section: Fouling and Slaggingmentioning

confidence: 99%

Experimental Study of the Viability of Low-Grade Biofuels in Small-Scale Appliances

et al. 2017

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Abstract:This experimental work aims to study the viability of making use of agricultural and forest residues as an alternative to produce biofuels for commercial devices. It focuses on the feasibility of three non-commercial biomass fuels in an underfed biomass pilot combustor with a power range of 7-12 kW th (500-800 kW/m 2 ). To carry out the investigation, the repeatability of the facility was studied using fuel with a high ash content. The relative deviations in the main parameters considered (combustion rate, gaseous emissions and particulate matter emissions) were below 10%. A feasibility analysis was performed by comparing the result obtained with a barley and leaf pellet with that obtained with a commercial wood pellet as a reference. The parameters used in this study were the operational parameters of the plant as well as the particle concentration and distribution, fouling and slagging. Comparing the results of the different fuels, it was determined that 25% leaf + 75% wood pellet (lp25) could be used as a commercial pellet with the incorporation of an additive. However, the two other fuels presented undesirable behavior characterized by high particle concentrations and notable amounts of slag.

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Section: Fouling and Slaggingmentioning

confidence: 99%

Experimental Study of the Viability of Low-Grade Biofuels in Small-Scale Appliances

et al. 2017

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“…Also, it was observed that the majority of the ash deposit formed on the top surface with little on the sides and none on the bottom of the probes which implies a low risk for fouling. The rate of deposit build up is defined as the amount of deposit collected per set surface area of the probe per unit time [16]. Using the ceramic sample area (e.g.…”

Section: Resultsmentioning

confidence: 99%

Pilot‐scale combustion of fast‐pyrolysis bio‐oil: Ash deposition and gaseous emissions

Khodier

Kilgallon

Legrave

et al. 2009

Env Prog and Sustain Energy

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Fast pyrolysis is a promising method to transform solid biomass into a liquid product called ''bio-oil'' with an energy density of four to five times greater than the feedstock. The process involves rapidly heating biomass to 450-6008C in the absence of air and condensing the vapor produced to give bio-oil. Typically, 50-75% (weight) of the feedstock is converted into bio-oil that has a number of uses, for example energy production or bio-refinery feedstock. This study investigated the gaseous emissions and ash deposition characteristics resulting from bio-oil combustion in a pilot scale combustion test rig at Cranfield University. A feeding system with heated lines and heated/stirred reservoir was used to feed a spray nozzle in the combustion chamber.Ash deposit samples were collected from the resulting flue gas using three air-cooled probes that simulate heat exchanger tubes with surface temperatures of 500, 600, and 7008C. The deposits formed were analyzed using SEM/EDX and XRD techniques to assess the corrosion potential of the deposits. The results are compared to measured ash deposit compositions formed from biomass combustion. Thermodynamic modeling software was used to make predictions for the partitioning of a range of elements for bio-oil combustion and the results compared to the measured data.

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“…These characteristics are combined trough several ratios and indexes developed to predict the risk of ash slagging and/or fouling during the combustion of coal and/or biomass. Such risk is substantially influenced by concentration of potassium, sodium, chlorine and sulphur [21][22][23]. In this study only the Fouling and slagging are determined as follows:…”

Section: Fouling and Slagging Tendencymentioning

confidence: 99%

The Impact of a Mild Sub-Critical Hydrothermal Carbonization Pretreatment on Umbila Wood. A Mass and Energy Balance Perspective

2015

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Over the last years, the pretreatment of biomass as a source of energy has become one of the most important steps of biomass conversion. In this work the effect of a mild subcritical hydrothermal carbonization of a tropical woody biomass was studied. Results indicate considerable change in carbon content from 52.78% to 65.1%, reduction of oxygen content from 41.14% to 28.72% and ash slagging and fouling potential. Even though decarboxylation, decarbonylation and dehydration reactions take place, dehydration is the one that prevails. The mass and energy balance was affected by the treatment conditions than the severity of the treatment.

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Fouling tendency of ash resulting from burning mixtures of biofuels. Part 1: Deposition rates

Cited by 129 publications

References 20 publications

Experimental Study of the Viability of Low-Grade Biofuels in Small-Scale Appliances

Experimental Study of the Viability of Low-Grade Biofuels in Small-Scale Appliances

Pilot‐scale combustion of fast‐pyrolysis bio‐oil: Ash deposition and gaseous emissions

The Impact of a Mild Sub-Critical Hydrothermal Carbonization Pretreatment on Umbila Wood. A Mass and Energy Balance Perspective

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