Isothermal combustion characteristics of anthracite and spent coffee grounds briquettes

Wei, Yuanhang; Chen, Meiqian; Niu, Shibo; Li, Yang

doi:10.1007/s10973-018-7790-x

Cited by 8 publications

(3 citation statements)

References 39 publications

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“…However, adding biomass may also increase NO emissions, depending on the N content of the biomass. The S in biomass is mainly in the form of organic compounds and sulfates [40], and SO 2 during SS combustion is primarily derived from the oxidation of aromatic sulfur and pyrite [41].…”

Section: Resultsmentioning

confidence: 99%

Synergistic effects of co‐combustion of sewage sludge and corn stalk and the resulting gas emission characteristics

Guo

Han

Wang

et al. 2020

IET Renewable Power Generation

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Increasing discharge of sewage sludge is a threat to the ecological environment, and sludge treatment via combustion is the most feasible alternative. However, the low calorific value and high-water content of raw sludge results in poor firing performance and increases the risk of environmental pollution. Recently, co-combustion has emerged as a more environment-friendly technology. Herein, the combustion behaviours of sewage sludge, corn stalk and their mixture at four heating rates were studied via thermogravimetric experiments. Results yielded the division of weight loss into three stages for corn stalk: dehydration, combustion of volatiles and combustion of fixed carbon; four stages were identified for sewage sludge and the mixture of sludge and stalk: dehydration, combustion of volatiles, combustion of fixed carbon and thermal decomposition of a small amount of minerals. Synergistic analyses found that with a 60% blending ratio of sewage sludge, interaction between the components in the high-temperature range was greatly promoted. Gas emission characteristics showed that CO 2 was the main product during (co-)combustion, while the NO x emissions at low (or high) temperatures for the blend were higher (or lower) than the theoretical values. Temperature had little effect on H 2 S emissions, though it significantly affected SO 2 emissions during co-combustion. V CS gas emissions when CS is burned SS E 60% actual amounts of released gas with sludge blending ratios of 60% SS C 60% theoretical amounts of released gas with sludge blending ratios of 60%

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Section: Resultsmentioning

confidence: 99%

Synergistic effects of co‐combustion of sewage sludge and corn stalk and the resulting gas emission characteristics

Guo

Han

Wang

et al. 2020

IET Renewable Power Generation

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“…Besides assessing their availability, it is also equally important to understand the chemical characteristics of these SCG wastes in order to ensure their renewability. To begin with, Spent coffee grounds (SCG) wastes are primarily made up of cellulose and hemicellulose compounds (Wei et al, 2019;Ballesteros et al, 2014;Vardon et al, 2013), followed by significant amount of lignin, caffeine, fatty and amino acids, polysaccharides and polyphenols, flavonoids and Millard products, and tannins (Pujol et al, 2013;Campos-Vega et al, 2015;Atabani et al, 2019;Rivera et al, 2020;Espuelas et al, 2020;Zabaniotou & Kamaterou, 2019;Limousy et al, 2013;Mata et al, 2018;Cruz et al, 2012;Murthy & Naidu, 2012). Especially, these wastes contain 11.6%-13.2% of cellulose, 37.2%-41.0% of hemicellulose, and 22.2-34.94% of lignin (Potip & Wongwuttanasatian, 2018;Lee et al, 2017;Brunerová et al, 2019); and which varies along with coffee species and coffee preparation technique (Blinová & Sirotiak, 2019).…”

Section: Chemichal Characteristics Of Scg Wastesmentioning

confidence: 99%

“…Again, reduced ash content were noticed in raw SCG briquettes, and increased with rising anthracite concentrations. Figure 8 demonstrates the composition of different metal oxides characterised from the residual ash content of anthracite and SCG (Wei et al, 2019). (iv) Citing this, these SCG wastes were either carbonised or mixed with additive for compaction into briquettes, which required both binder and water content to establish higher level of bonding between their particles.…”

Section: Combustion Characteristics Of Scg Briquettesmentioning

confidence: 99%

<strong>A Critical Review on Briquettes Developed from Spent Coffee Ground Wastes</strong>

Srinivasan¹,

Mahajan²,

Seth³

et al. 2022

Preprint

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Coffee is regarded as the highly consumed beverage throughout the world and has established a key spot in the world economy as an important commodity for trading. In general, they are produced by brewing their roasted and ground beans, which release aromatic coffee; as well as produce an equivalent amount of spent coffee grounds (SCG). Previously, they were discarded as wastes or used as natural pest repellent or garden fertilizer; however, in recent times, are valorized into biofuels owing to their high calorific value. In fact, SCG briquettes have gained wide attention for supplying energy renewably, especially to the rising energy demand; and also have been identified as an effective measure to reduce their pollution. With this in mind, this present chapter focuses on reviewing the availability and chemistry involved in these SCG wastes, pre-treatments and preparations required for their briquetting, compacting techniques followed, and fuel characteristics of their briquettes, from various available works of literature. Here, their availability showcases the amount of SCG wastes generated with respect to time and consumption, wherein understanding their chemistry helps in deciding the pre-treatments necessary for their briquetting. Meanwhile, preparation techniques briefs about the necessary pre-treatments undertaken before compaction by different researchers; and the fuel characteristics define the physicochemical and mechanical properties of their briquettes, developed using various compaction methods. Besides, combustion behaviors of these briquettes are explained in terms of their burning characteristics and emission levels, as reported in literatures; which help in deciding their suitability as a replacement for existing fossil coal. Eventually, all the reported data were in accordance with their permissible standards and suggested these SCG as a highly renewable solid biofuel.

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Experimental studies on mass transfer during convective drying of spent coffee grounds generated in the soluble coffee industry

Cruz

Carnicero

Hernández-Escobedo³

et al. 2020

J Therm Anal Calorim

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Isothermal combustion characteristics of anthracite and spent coffee grounds briquettes

Cited by 8 publications

References 39 publications

Synergistic effects of co‐combustion of sewage sludge and corn stalk and the resulting gas emission characteristics

Synergistic effects of co‐combustion of sewage sludge and corn stalk and the resulting gas emission characteristics

<strong>A Critical Review on Briquettes Developed from Spent Coffee Ground Wastes</strong>

Experimental studies on mass transfer during convective drying of spent coffee grounds generated in the soluble coffee industry

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