A型分子筛对WPCBs燃烧特性的影响

杨帆; 叶子玮; 陈楠纬; 任杰; 林伟雄; 张文治; 赵科明; 孙水裕

doi:10.13205/j.hjgc.202108022

A型分子筛对WPCBs燃烧特性的影响

doi: 10.13205/j.hjgc.202108022

杨帆^1,4,5,6,
叶子玮^1,4,5,6,
陈楠纬^1,4,5,6,
任杰^1,4,5,6,
林伟雄^3,4,5,6,
张文治^1,4,5,6,
赵科明^1,4,5,6,
孙水裕^{1,2,4,5,6, ,}

1. 广东环境保护工程职业学院, 广东佛山 528216;
2. 广东工业大学, 广州 510006;
3. 肇庆学院, 广东肇庆 526061;
4. 广东省固体废弃物资源化与重金属污染控制工程技术研究中心, 广东佛山 528216;
5. 广东省环境保护矿冶行业重金属污染防治与职业教育重点实验室, 广东佛山 528216;
6. 佛山市重金属污染防治与资源综合利用工程技术研究中心, 广东佛山 528216

基金项目:

广东省省级科技计划项目（2017A030223007）；广东普通高校创新团队项目（2017GKCXTD004）。

详细信息

作者简介:
杨帆(1985-),男,博士,副教授,主要从事工业固废资源回收,危险废物处理处置。fenix1985@126.com

通讯作者:
孙水裕(1965-),男,教授,主要从事工业固废资源回收,危险废物处理处置。1512764172@qq.com

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- 被引次数: 0
出版历程
- 收稿日期: 2020-09-16
- 网络出版日期: 2022-01-18

EFFECTS OF A ZEOLITE ON PYROLYSIS CHARACTERISTICS OF WASTE PRINTED CIRCUIT BOARDS

YANG Fan^1,4,5,6,
YE Zi-wei^1,4,5,6,
CHEN Nan-wei^1,4,5,6,
REN Jie^1,4,5,6,
LIN Wei-xiong^3,4,5,6,
ZHANG Wen-zhi^1,4,5,6,
ZHAO Ke-ming^1,4,5,6,
SUN Shui-yu^{1,2,4,5,6
, ,}

1. Guangdong Polytechnic of Environmental Protection Engineering, Foshan 528216, China;
2. School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China;
3. Zhaoqing University, Zhaoqing 526061, China;
4. Guangdong Engineering and Technology Research Center of Solid Waste Resource Recovery and Heavy Metal Pollution Control, Foshan 528216, China;
5. Key Laboratory of Mining and Metallurgy Industry Heavy Metals Pollution Prevention and Vocational Education of Environmental Protection of Guangdong Province, Foshan 528216, China;
6. Foshan Engineering and Technology Research Center of Heavy Metal Pollution Prevention and Resources Comprehensive Utilization, Foshan 528216, China

摘要

摘要: 利用热重分析法研究不同气氛（空气和N₂）、添加不同催化剂（4A和5A）下，废电路板非金属粉末（WPCBs）的燃烧特性，计算各类综合燃烧特性曲线，并建立燃烧动力学方程。结果表明：空气气氛下，WPCBs燃烧曲线存在3个明显失重峰，即挥发分析出与热解、难燃有机物分解以及固定碳热解；而N₂气氛下，WPCBs燃烧曲线存在1个明显失重峰和1个次失重峰，即挥发分析出与热解、难燃有机物分解。加入催化剂（4A和5A），WPCBs燃烧特性曲线的水分析出失重峰明显加强，挥发分析出与燃烧和难燃有机物分解失重峰强度明显减弱。在N₂气氛下，WPCBs燃烧具有较高的挥发分释放特性指数D、可燃指数C和综合燃烧特性指数S，而燃尽指数C_b较小。利用Coats-Redfern积分法计算得到不同气氛及催化剂条件下WPCBs燃烧的平均表观活化能E_av，其中E_av约为227.29 kJ/mol（空气或N₂）、72.35~115.99 kJ/mol（空气/N₂+4A/5A）。修正后的质量平均表观活化能E_m为76.38 kJ/mol（空气）、115.09 kJ/mol（N₂）、≤47.26 kJ/mol（空气/N₂+4A/5A）。WPCBs热解的挥发分1峰前反应过程拟合方程为f（α）=（1-α）^0.5；而其峰后、挥发分2和固定碳燃尽阶段反应过程拟合方程为f（α）=（1-α）²。
- 废电路板非金属粉末(WPCBs) /
- A型分子筛 /
- 燃烧特性 /
- 动力学模型 /
- Coats-Redfern积分法
Abstract: In this article, thermogrmetric analysis was used to study the pyrolysis characteristics of waste printed circuit boards (WPCBs) under different atmospheres (air and nitrogen) and with different catalysts (4A and 5A). Various comprehensive pyrolysis characteristic curves were calculated, and the pyrolysis kinetic equations were established. The experimental results indicated that there are three obvious weight loss peaks in the pyrolysis curve of WPCBs under air atmosphere, corresponding to the volatile emission and pyrolysis, the decomposition of refractory organic matter and the fixed carbon pyrolysis respectively. Then, the two obvious weight loss peaks appeared in the WPCBs combustion curve under air atmosphere, corresponding to the volatile emission and pyrolysis and the decomposition of refractory organic matters. In the atmosphere of air and nitrogen, with the addition of catalyst (4A and 5A), the weight loss peak of water precipitation in WPCBs pyrolysis characteristic curve was significantly enhanced, and the strength of volatilization analysis and weight loss peak of pyrolysis and decomposition of refractory organic matter was significantly reduced. Under nitrogen atmosphere, WPCBs pyrolysis had higher volatile characteristic index D, flammability index C and comprehensive combustion index S, while the burnout index Cb was smaller. Nevertheless, the apparent activation energy (E_av) of WPCBs pyrolysis under different atmosphere and catalyst conditions was calculated by using Coats-Redfern integral method. The E_av was 227.29 kJ/mol (air or nitrogen) and 72.35~115.99 kJ/mol (air/nitrogen+4A/5A). After correction, the average mass apparent activation energy E_m was 76.38 kJ/mol (air), 115.09 kJ/mol (nitrogen), ≤47.26 kJ/mol (air/nitrogen+4A/5A). Consequently, the reaction mechanisms of the pre-peak of the first volatile stage could be described as f(α)=(1-α)^0.5, while the post-peak of the first volatile, the pre-peak and post-peak of the second volatile stage and the fixed carbon combustion stage could be described as f(α)=(1-α)².
- waste printed circuit board (WPCBs) /
- A zeolite /
- combustion characteristic /
- kinetics model /
- Coats-Redfern

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