Co-hydrothermal carbonization of corn stalk and swine manure: Combustion behavior of hydrochar by thermogravimetric analysis

Lang, Qianqian; Zhang, Bo; Liu, Zhengang; Chen, Zeliang; Yu, Xilong; Liu, Dong; Ma, Jing; Gai, Chao

doi:10.1016/j.biortech.2018.09.100

Cited by 112 publications

(66 citation statements)

References 36 publications

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“…Similarly, the accumulation of phosphorus and potassium in swine manure-derived hydrochars was also reported by [30]. Recently, a mixture of swine manure and corn stalk was converted into hydrochar via HTC by Lang et al [5]. Their analyses suggest that the ignition temperatures of hydrochars prepared from swine manure were greater than those of hydrochars prepared from corn stalks.…”

Section: Introductionmentioning

confidence: 54%

“…If not handled properly, the components of manure, namely, organic carbon, nitrogen, phosphorus, potassium, heavy metals (e.g., copper, zinc, cadmium), hormones, and steroids, can negatively impact the environment [3]. Currently available technologies for manure management and treatment include anaerobic lagoons, anaerobic digestion for methane production, and composting [4,5].…”

Section: Introductionmentioning

confidence: 99%

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Valorization of Swine Manure into Hydrochars

2019

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There is a significant interest in valorizing swine manure that is produced in enormous quantities. Therefore, considering the high moisture content in swine manure, the objective of this research was to convert manure slurry into hydrochars via hydrothermal carbonization and analyze the yields, pH, energy contents, and thermal and oxidation kinetic parameters. Experiments were performed in triplicate in 250 mL kettle reactors lined with polypropylene at 180 °C, 200 °C, 240 °C, 220 °C, and 260 °C for 24 h. Analyses of the results indicated that the process temperature affected the hydrochar yields, with yield generally decreasing with increasing temperature, but it had little effect on the composition of the hydrochar. The hydrochars were found to have higher volatile contents and H/C and O/C ratios and about 85% of the energy compared to coal. However, the presence of high fraction (35–38%) of ash in hydrochars is a serious concern and needs to be addressed before the complete utilization of hydrochars as fuels. The surface characterization of hydrochars coupled with wet chemistry experiments indicated that hydrochars were equipped with nitrogen functional groups with points of zero charges between 6.76 and 7.85, making them suitable as adsorbents and soil remediation agents and energy storage devices.

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Section: Introductionmentioning

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Valorization of Swine Manure into Hydrochars

2019

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“…The combustion stability index (R w ) [35,36] represents the stability in the process of the combustion, which is delineated as:…”

Section: Discussionmentioning

confidence: 99%

Influence of Different Thermal Aging Conditions on Soot Combustion with Catalyst by Thermogravimetric Analysis

et al. 2021

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Diesel particulates are deposited in the diesel particulate filter and removed by the regeneration process. The Printex-U (PU) particles are simulated as the diesel soot to investigate the influence of thermal aging conditions on soot combustion performance with the addition of catalysts. The comprehensive combustion index S, combustion stability index Rw and peak temperature Tp are obtained to evaluate the combustion performance. Compared with the PU/Pt mixtures of different Pt contents (2 g/ft3, 3.5 g/ft3, and 5 g/ft3), the 10 g/ft3 Pt contents improve soot combustion with the outstanding oxygen absorption ability. When the weight ratio of PU/Pt mixture is 1:1, the promoted effect achieves the maximum degree. The S and Rw increase to 8.90 × 10−8 %2min−2°C−3 and 39.11 × 105, respectively, compared with pure PU. After the thermal aging process, the PU/Pt mixture with a 350 °C aging temperature for 10 h promotes the soot combustion the best when compared to pure PU particles. It is not good as the PU/Pt mixture without aging, because the inner properties of soot and Pt/Al2O3 catalyst may have been changed. The S and Rw are 9.07 × 10−8 %2min−2°C−3 and 38.39 × 105, respectively, which are close to the no aging mixture. This work plays a crucial role in understanding the mechanism of the comprehensive effect of soot and catalyst on soot combustion after the thermal aging process.

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“…Higher values of the S index indicate that the combustion performance is better. 43 The R w index reects the stability in the process of combustion, 44 which is dened as:…”

Section: Discussionmentioning

confidence: 99%