Dynamic, synergistic, and optimal emissions and kinetics of volatiles during co-pyrolysis of soil remediation plants with kaolin/modified kaolin

被引：23

作者：

Chen, Zhibin ^{[1
]}

Li, Weijie ^{[2
]}

Huang, Shengzheng ^{[1
]}

Zhuang, Ping ^{[3
,4
]}

Jia, Dajie ^{[1
]}

Evrendilek, Fatih ^{[5
,6
]}

Zhong, Sheng ^{[1
]}

Ninomiya, Yoshihiko ^{[7
]}

Yang, Zuoyi ^{[1
]}

He, Yao ^{[1
]}

Xie, Wuming ^{[1
]}

Liu, Jingyong ^{[1
]}

Zhuang, Guanzheng ^{[1
]}

Sun, Shuiyu ^{[1
]}

机构：

[1] Guangdong Univ Technol, Inst Environm Hlth & Pollut Control, Sch Environm Sci & Engn, Guangdong Key Lab Environm Catalysis & Hlth Risk C, Guangzhou 510006, Peoples R China

[2] Minist Ecol & Environm, South China Inst Environm Sci, Key Lab Water & Air Pollut Control Guangdong Prov, State Environm Protect Key Lab Water Environm Simu, Guangzhou 510535, Peoples R China

[3] Chinese Acad Sci, Guangdong Prov Key Lab Appl Bot, Guangzhou 510650, Peoples R China

[4] Chinese Acad Sci, Key Lab Vegetat Restorat & Management Degraded Eco, South China Bot Garden, Guangzhou 510650, Peoples R China

[5] Boston Univ, Coll Engn, Dept Elect & Comp Engn, Boston, MA 02215 USA

[6] Bolu Abant Izzet Baysal Univ, Dept Environm Engn, TR-14052 Bolu, Turkiye

[7] Chubu Univ, Dept Appl Chem, Kasugai, Aichi 4878501, Japan

来源：

CHEMICAL ENGINEERING JOURNAL | 2024年 / 483卷

关键词：

Soil remediation plants; Kaolin modification; Kinetic models; Dynamic gas evolution; Sequential temperature dependency; TG-FTIR; REACTION-MECHANISMS; COMBUSTION; BIOCHAR; SLUDGE; PRODUCTS; BEHAVIOR;

D O I：

10.1016/j.cej.2024.149214

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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.

引用

页数：21

共 70 条

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