Yazar "Zhuang, Ping" seçeneğine göre listele

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  • Küçük Resim
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    Dynamic, synergistic, and optimal emissions and kinetics of volatiles during co-pyrolysis of soil remediation plants with kaolin/modified kaolin
    (Elsevier Science Sa, 2024) Chen, Zhibin; Li, Weijie; Huang, Shengzheng; Zhuang, Ping; Jia, Dajie; Evrendilek, Fatih; Zhong, Sheng
    The post-harvest disposal of soil remediation plants (SRPs) needs to be eco-friendly for remediation techniques to be sustainable. Incorporating Al/Si-based materials as additives may prove to be an effective method for stabilizing heavy metals during the pyrolysis of Zn/Cd-enriched SRPs. Based on the coupling of thermogravimetry - Fourier-transform infrared spectrometry - mass spectrometry - two-dimensional correlation spectrum analyses (TG-FTIR-MS-2D-COS) and Gaussian modeling, this study aimed to quantify and unveil dynamic, synergistic, and optimal emissions and kinetics of volatile components in response to the co-pyrolysis of Pfaffia glomerata (PG) with kaolin (K) or modified kaolin (KH). The kinetic mechanism of the thermal decomposition stage of volatile components was best accounted for by the diffusion model (100-315 degrees C) and reaction order model (315-600 degrees C).The Al-OH group in K enhanced the evolution and emission of CO2, H2O, and CH4. PG mixed with 10 % K (PK91) reduced the average activation energy value of PG from 217.90 to 196.44 kJ/mol. Compared with K, KH demonstrated superior thermal stability and controlled the cleavage of carbonyl, ether, carboxyl, and methyl groups, thus reducing gaseous pollution. Specifically, PG mixed with 20 % KH (PKH82) minimized the mass loss of PG biochar by 112.81 %, while PG mixed with 10 % KH (PKH91) reduced the E-a value of PG to 155.91 kJ/mol. The sequential temperature dependency of volatiles in PG, identified through two-dimensional correlation spectroscopy, was altered by both K and KH. Given artificial neural network-based simulations, the simultaneously optimized reduction in total volatile emission and fuel mass was achieved with PKH91 but diminished with the rising temperature. These insights contribute to optimizing energy and controlling air pollution during the co-pyrolysis of SRPs with Al/Si-based materials.
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    Optimizing co-combustion synergy of soil remediation biomass and pulverized coal toward energetic and gas-to-ash pollution controls
    (Elsevier, 2023) Chen, Zhibin; Chen, Zhiliang; Liu, Jingyong; Zhuang, Ping; Evrendilek, Fatih; Huang, Shengzheng; Chen, Tao; Xie, Wuming; He, Yao; Sun, Shuiyu
    The co-combustion synergy of post-phytoremediation biomass may be optimized to cultivate a variety of benefits from re ducing dependence on fossil fuels to stabilizing heavy metals in a small quantity of ash. This study characterized the thermo kinetic parameters, gas-to-ash products, and energetically and environmentally optimal conditions for the co-combustions of aboveground (PG-A) and belowground (PG-B) biomass of Pfaffia glomerata (PG) with pulverized coal (PC). The mono combustions of PG-A and PG-B involved the decompositions of cellulose and hemicellulose in the range of 162–400 °C and of lignin in the range of 400–600 °C. PG improved the combustion performance of PC, with the blends of 30 % PG A and 70 % (PAC37) and 10 % PG-B and 90 % PC (PBC19) exhibiting the strongest synergy. Both PG-A and PG-B interacted with PC in the range of 160–440 °C, while PC positively affected PG in the range of 440–600 °C. PC decreased the apparent activation energy (Eα) of PG, with PBC19 having the lowest Eα value (107.85 kJ/mol). The reaction order models (Fn) best elucidated the co-combustion mechanisms of the main stages. Adding >50 % PC reduced the alkali metal content of PG, prevented the slagging and fouling depositions, and mitigated the Cd and Zn leaching toxicity. The functional groups, vol atiles, and N- and S-containing gases fell with PAC37 and PBC19, while CO2 emission rose. Energetically and environmen tally multiple objectives for the operational conditions were optimized via artificial neural networks. Our study presents controls over the co-circularity and co-combustion of the soil remediation plant and coal