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

Guo, Shuai; Han, Yang; Wang, Liye; Che, Deyong; Liu, Hong-Peng; Sun, Baizhong

doi:10.1049/iet-rpg.2020.0104

Cited by 12 publications

(7 citation statements)

References 42 publications

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“…At the same time, the alkaline matters in biomass ash, including oxides of potassium, sodium, and magnesium, catalyzed the co-combustion of the blends and then accelerated the reaction rate. This assumption was also confirmed by other researchers (Wang et al, 2016;Wang et al, 2019;Guo et al, 2020), who found the promoting reactions between alkaline and alkaline earth metals in biomass ash and solid carbon in coal.…”

Section: Synergistic Effect Analysissupporting

confidence: 85%

“…To identify whether interactions between coal and biomass happened during the co-combustion process, the calculated TG curves of the blends based on the experimental curves of individual fuels were compared with experimental curves. Assuming that there were no interactions between the two components, the calculated TG curves could be expressed as follows (Wang et al, 2019;Guo et al, 2020):…”

Section: Synergistic Effect Analysismentioning

confidence: 99%

“…According to Chen et al (2018) and Liu et al (2015), the combustion indices, such as maximum mass loss, ignition performance, and the comprehensive combustion index, were evaluated. Guo et al (2020) and Shi et al (2019) found the interaction between coal and biomass, including promoting synergy and inhibiting effects. The combustion kinetic parameters, including activation energy and the preexponential factor, using the Coats and Redfern method (Gil et al, 2010;Wang et al, 2012;Lin et al, 2015;Jayaraman et al, 2017;Chen et al, 2018) and the Flynn-Wall-Ozawa method (Xie and Ma, 2013;Liu et al, 2015;Konwar et al, 2019;Wang et al, 2019;Guo et al, 2020) were determined.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Synergistic Effect Analysissupporting

confidence: 85%

Section: Synergistic Effect Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Yuan

Tan

et al. 2021

Front. Energy Res.

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“…Ding and Jiang [24] reported the sludge decomposition using copyrolysis of sludge with biomass without an external heat supply. However, Guo et al [25] reported CO 2 as the main product for copyrolysis of sludge and corn stalk (biomass) and observed an antisynergestic effect on NOx emission at low heating temperatures. Ruiz-Gómez et al [26] observed no significant synergistic effect for mixed sludge and manure thermal decomposition by thermogravimetry (TG) analysis.…”

Section: Copyrolysis Of Peanut Shell and Sludgementioning

confidence: 99%

Characteristics of Pyrolysis and Copyrolysis Products Sewage Sludge in Different Temperature Ranges

Liu

Zhang

et al. 2022

Journal of Chemistry

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Rapid modernization, population growth, and improvement in people’s quality of life have resulted in an increase in urban sewage sludge as the main solid waste. At present, pyrolysis is the main treatment method for sludge due to carbon-free effects and less air pollution compared with incineration. To enhance the energy utilization value of sludge, copyrolysis of sludge and biomass with varying effects has been reported. Herein, biomass and sludge were pyrolyzed and copyrolyzed using self-designed fixed-bed pyrolysis and condensation collection system. The pre-fixed-bed process parameters were optimized by orthogonal test, and it was found that the carrier gas flow rate (a) > bed thickness (b) > constant temperature time (c). The optimum process combinations were 250 mL/min carrier gas, 10 mm bed thickness, and 10 min constant temperature. Experiments show that the ultimate pyrolysis temperature affects the oil production of fixed-bed pyrolysis by up to 15%. Copyrolyzing Sargassum thunbergii and sludge boost oil output at first and then drops; the maximum value is at 20% sludge. When pine sawdust and sludge were copyrolyzed, oil output climbed marginally and subsequently fell fast; the highest value was at 20% sludge. Peanut shell and sludge copyrolysis yield the most oil at 40% sludge content, and the experimental value is smaller than the linear value at 80% sludge content.

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“…Ding and Jiang showed that SS decomposition, without external heat supply, by means of co-pyrolysis of SS with waste biomass was practically achieved. However, Guo et al . reported that the co-pyrolysis of SS and corn stalk had an antisynergistic effect on NO x emission at low heating temperatures, and CO 2 was the main product during co-pyrolysis.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effects on the Co-pyrolysis of Agricultural Wastes and Sewage Sludge at Various Ratios

Chen

Jian

2021

ACS Omega

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This study investigated the co-pyrolysis of blends of sewage sludge (SS) with rice husk (RH) and with hemp straw (HS) at different ratios by using thermogravimetry (TG) and its rate (DTG, derivative TG) analysis at heating rates of 10, 20, and 30 K/min. The resulting kinetic parameters of activation energy (E a ) were calculated by both Flynn−Wall−Ozawa and Kissinger−Akahira−Sunose models, followed by comparison of experimental values with calculated values to reveal the synergistic effects of SS/RH and SS/HS. With increasing additions of RH or HS to SS, a gradual decreasing trend in the experimental pyrolysis temperature range was evident, ranging from 144.5 to 95.2 °C for SS/RH and from 144.5 to 88.8 °C for SS/RH. Moreover, such temperature ranges were 6.7−20.4 °C less than the calculated values at the same blending ratio. The fitting results of the two kinetic models showed that with the same SS mass ratio, the experimental E a * (average activation energy) of both SS/RH and SS/HS were less than the calculated E a *. Especially, the experimental E a * of 7SS−3RH was lower around 43.8% than the calculated E a *, whereas the experimental E a * of 3SS−7HS was lower by about 39.4% than the calculated E a *. Synergistic analysis demonstrated that the co-pyrolysis of RH or HS with SS at various mass ratios presented obvious synergistic effects and then the decrease of E a . The mechanism experiment showed that the co-pyrolysis of SS/HS may promote the decrease of E a by changing the co-pyrolysis gas products or by increasing the overflow of volatile matter and then forming intermediate transition products, while SS/RH may accelerate the decrease of the E a by using an appropriate K addition ratio from RH as a metal catalyst.

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

Cited by 12 publications

References 42 publications

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

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

Characteristics of Pyrolysis and Copyrolysis Products Sewage Sludge in Different Temperature Ranges

Synergistic Effects on the Co-pyrolysis of Agricultural Wastes and Sewage Sludge at Various Ratios

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