TG–MS analysis of thermal behavior and gaseous emissions during co-combustion of straw with municipal sewage sludge

Li, Linna; Ren, Qiangqiang; Wang, Xin; Li, Shiyuan; Qi, Lu

doi:10.1007/s10973-014-3952-7

Cited by 24 publications

(4 citation statements)

References 44 publications

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“…In the ultimate analysis, the N content of the SS was higher than that of the CS, but the amount of NO x released was low, indicating that in the SS, N may have been converted into other nitrides, such as NH 3 , HCN and HCNO [36]. This change may have been due to the catalysis of minerals in the SS, which converted N into organic nitrogen [37]. The release of SO 2 in the SS was higher than that of CS, but the release of H 2 S was lower than that of CS.…”

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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“…While more coal was mixed with CS, the combustion of char needed more heat, but the combustion of biomass char could not provide sufficient heat; thus, the third DTG peak moved forward to a higher-temperature range. In a similar case in corn and wheat straw, Li et al (2014) and Wang et al (2019) identified the same phenomenon.…”

Section: Co-combustion Properties Of the Biomass And Coal Blendsmentioning

confidence: 57%

Co-Combustion Characteristics of Typical Biomass and Coal Blends by Thermogravimetric Analysis

Yuan

Tan

et al. 2021

Front. Energy Res.

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In this study, the co-combustion characteristics of coal and biomass blends (20, 40, 60, 80, and 100 wt%) were investigated by thermogravimetric analysis. All the samples were operated under an oxidative atmosphere, with a heating rate of 20 C/min. The reaction stages, ignition and burnout temperature, maximum weight loss rate, and different combustion indices were determined. When the percentage of biomass in the blends was increased, the maximum mass loss rate was enhanced in the second region, and the ignition and burnout temperature was lowered, indicating the higher reactivity and better combustion performance of the samples. The comprehensive performance index presented an N shape with the increasing biomass blending ratio. Based on various combustion indices, 20% was an optimum percentage for the co-utilization of coal-biomass blends. A significant promoting interaction was observed between corn straw and rice straw blends, while inhibiting effects occurred between rice husk and coal. The kinetic parameters of the blends were evaluated by the Coats and Redfern method using the nth-order reaction model. The value of activation energy and the pre-exponential factor increased with the decreasing biomass percentage in the blends.

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“…The release of typical gas species during pyrolysis of SS and biomass was also investigated by thermogravimetry–mass spectrometry (TG-MS) and thermogravimetric Fourier transform infrared spectroscopy (TG-FTIR), , which contributed to the better NO x emission control. The results of TG-MS analysis during cocombustion of straw and SS suggested an SS proportion of less than 30% in blend fuels . The synergistic effect on NO x and SO 2 reduction was observed during the cocombustion of SS and three kinds of biomasses .…”

Section: Introductionmentioning

confidence: 91%

“…The results of TG-MS analysis during cocombustion of straw and SS suggested an SS proportion of less than 30% in blend fuels. 14 The synergistic effect on NO x and SO 2 reduction was observed during the cocombustion of SS and three kinds of biomasses. 15 Meanwhile, the study on volatile-N and char-N during pulverized coal combustion in the O 2 /CO 2 atmosphere at a high temperature 16 helped obtain the fuel nitrogen conversion mechanism.…”

Section: Introductionmentioning

confidence: 94%

Research on Thermal Behaviors and NO_x Release Properties during Combustion of Sewage Sludge, Sawdust, and Their Blends

et al. 2022

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To investigate the thermal behaviors and NO x emission properties during combustion of sewage sludge (SS), sawdust (SD), and their blends (SS5SD5, SS3SD7, and SS1SD9 with SD proportions of 50, 70, and 90 wt %, respectively), tests were conducted using thermogravimetry–mass spectrometry (TG-MS), Fourier transform infrared spectroscopy (FTIR), and a tube furnace in this study. Results indicated that hydrogen in the fuel was mainly released during volatile combustion, and carbon conversion proceeded during the whole combustion process. With the SD proportion increasing, samples exhibited better combustion characteristics. Compared to SD, SS emitted more NO x due to its higher nitrogen content but showed lower conversion ratios from fuel nitrogen to NO x , and the NO x yields decreased significantly with the increase in SD proportion. NO x emissions of higher volatile samples were more sensitive to temperature, and NO x yields of SD and SS1SD9 continued to decrease from 800 to 1000 °C, whereas NO x yields of SS, SS5SD5, and SS3SD7 changed slightly from 800 to 900 °C and decreased significantly from 900 to 1000 °C. Synergistic effects of cocombustion on NO x emission varied with the blending ratio and temperature. SS5SD5 and SS3SD7 always presented a positive NO x reduction performance, and SS1SD9 exhibited opposite NO x reduction effects at different temperatures. Synthetically considering the SS disposal capacity, combustion characteristic, and NO x yield, an SS proportion of around 30% in blends is more recommended in practical applications.

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TG–MS analysis of thermal behavior and gaseous emissions during co-combustion of straw with municipal sewage sludge

Cited by 24 publications

References 44 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

Co-Combustion Characteristics of Typical Biomass and Coal Blends by Thermogravimetric Analysis

Research on Thermal Behaviors and NO_x Release Properties during Combustion of Sewage Sludge, Sawdust, and Their Blends

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TG–MS analysis of thermal behavior and gaseous emissions during co-combustion of straw with municipal sewage sludge

Cited by 24 publications

References 44 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

Co-Combustion Characteristics of Typical Biomass and Coal Blends by Thermogravimetric Analysis

Research on Thermal Behaviors and NOx Release Properties during Combustion of Sewage Sludge, Sawdust, and Their Blends

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Research on Thermal Behaviors and NO_x Release Properties during Combustion of Sewage Sludge, Sawdust, and Their Blends