The thermal behavior and kinetics of co-combustion between sewage sludge and wheat straw

Wang, Chengxin; Wang, Xinhua; Jiang, Xuedan; Li, Fengyu; Lei, Yanyan; Lin, Qizhao

doi:10.1016/j.fuproc.2019.02.024

Cited by 81 publications

(44 citation statements)

References 52 publications

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“…The increased sulfur content was also observed for some oilseed samples, such as mustard (1.08wt%), sunflower (up to 0.2wt%), camelina (up to 0.9wt%), and cocoa (0.11wt%). This was similar to information found in other literary sources [29][30][31][32]. The combustion of sulfur-containing material releases its volatile content, which subsequently reacts with hydrogen to form hydrogen sulfide, or with oxygen to form sulfur dioxide.…”

Section: Resultssupporting

confidence: 88%

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Characteristic Properties of Alternative Biomass Fuels

et al. 2020

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Biomass is one of the most promising renewable energy sources because it enables energy accumulation and controlled production. With this, however, the demand for biofuels grows and thus there is an effort to expand their portfolio. Nevertheless, to use a broader range of biofuels, it is necessary to know their fuel properties, such as coarse and elemental analysis, or lower heating value. This paper presents the results of testing the fuel properties of several new, potentially usable biofuels, such as quinoa, camelina, crambe, and safflower, which are compared with some traditional biofuels (wood, straw, sorrel, hay). Moreover, the results of the determination of water content, ash, and volatile combustible content of these fuels are included, along with the results of the elemental analysis and the determination of higher and lower heating values. Based on these properties, it is possible to implement designs of combustion plants of different outputs for these fuels.

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Section: Resultssupporting

confidence: 88%

“…For example, in Barbanera and Cotana [27], the ash content in the dry matter of the digestate was 12.38%, whereas in the sample digestate we analyzed, 11.31% ash was found. Similar values were found in safflower seed (3.0%) [28], sunflower peel (2.7%) [29], and wheat straw (6.72%) [30].…”

Section: Resultssupporting

confidence: 81%

Characteristic Properties of Alternative Biomass Fuels

et al. 2020

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“…2. The elemental carbon (C) content in the material tested in the present study does not differ from the C content in sewage sludge reported in the literature [27]. In the examined sewage sludge, C content ranged from 22.4 wt.…”

Section: Resultscontrasting

confidence: 54%

“…Figure 5 shows the dependence of the higher heating value (HHV) on the content of elemental carbon (C). With increasing C content, there increases energy from fuel combustion caused by enlarged available chemical energy in fuel mass unit [27,31]. show that with increasing carbon (C) and hydrogen (H) content, there increases the higher heating value of the sewage sludge investigated.…”

Section: Resultsmentioning

confidence: 96%

Testing properties of sewage sludge for energy use

Król¹,

Iskra²,

Ferens³

et al. 2019

Environ. Protect. Eng.

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The properties of sewage sludge in the context of their further energy use have been examined. For this purpose, 34 samples of sewage sludge from municipal sewage treatment plants from the area of Lower Silesia with a capacity higher than the 2000 population equivalent (PE) with separate sludge management were tested. As part of the study, tests were made to determine the technological usefulness of fuels and their elemental composition, i.e., technical analyses and elemental analyses. The obtained results show a large diversity of basic physicochemical properties of the tested sewage sludge. The share of volatile components important for energetic use ranged from 38.4 to 59.8 wt. %. The content of carbon (C) in the mass of tested sewage sludge ranged from 22.4 to 39.2 wt. %, which means that they have a lower content of elemental carbon compared to solid fuels. The higher heating value (HHV) of sewage sludge ranged from 9.3 to 17.4 MJ/kg dry mass.

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“…Because of the excessive consumption and nonrenewability of traditional energy sources, energy security is deemed as an important element affecting social and economic development. Currently, most combustion studies are based on conventional straw‐based biomass . It is easy to ignore that unconventional biomass (shell‐based biomass) is a promising fuel that provides thermal energy .…”

Section: Introductionmentioning

confidence: 99%

An experimental study of single unconventional biomass pellets: Ignition characteristics, combustion processes, and artificial neural network modeling

Lin

Wang

et al. 2020

Int J Energy Res

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Summary This study applied the artificial neural networks (ANNs) model to the thermal data obtained by suspension ignition and combustion experiment of single peanut shells (PS, millimeter scale) pellet under O2/CO2 atmosphere. ANN11 was the best ANN model for predicting the relevant parameters of PS combustion. The coincidence between ANN prediction data and experimental data was over 99%. Two modes of biomass pellet ignition were observed: homogeneous ignition of volatiles and hetero‐homogeneous ignition of volatiles and char simultaneously. The ignition mode was transformed from homogeneous ignition to hetero‐homogeneous ignition when oxygen concentration was 50%. In addition, it was observed that ignition at the bottom emerged first, and then the upper end was ignited, finally generating an envelope flame. This phenomenon occurred when gas flow temperature exceeded 873 K or the oxygen concentration was greater than 50%. The reduction of ignition delay time and internal ignition temperature from 21% to 50% oxygen concentration was more intense than that of 50% to 100% oxygen concentration. Increasing oxygen concentration or temperature resulted in a shorter, brighter, and more stable volatile flame of biomass pellets, which reduced volatile burnout time. Nevertheless, the impact of gas flow rate on biomass combustion was intricate and irregular.

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The thermal behavior and kinetics of co-combustion between sewage sludge and wheat straw

Cited by 81 publications

References 52 publications

Characteristic Properties of Alternative Biomass Fuels

Characteristic Properties of Alternative Biomass Fuels

Testing properties of sewage sludge for energy use

An experimental study of single unconventional biomass pellets: Ignition characteristics, combustion processes, and artificial neural network modeling

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