化工学报 ›› 2024, Vol. 75 ›› Issue (9): 3310-3319.DOI: 10.11949/0438-1157.20240306
丁湧1(), 李文建2, 陈昭宇3, 曹立辉1, 刘轩铭1, 任强强3, 胡松3(), 向军3
收稿日期:
2024-03-18
修回日期:
2024-05-25
出版日期:
2024-09-25
发布日期:
2024-10-10
通讯作者:
胡松
作者简介:
丁湧(1983—),男,硕士,高级工程师,16123129@ceic.com
基金资助:
Yong DING1(), Wenjian LI2, Zhaoyu CHEN3, Lihui CAO1, Xuanming LIU1, Qiangqiang REN3, Song HU3(), Jun XIANG3
Received:
2024-03-18
Revised:
2024-05-25
Online:
2024-09-25
Published:
2024-10-10
Contact:
Song HU
摘要:
资源化处理回收废旧晶体硅光伏组件迫在眉睫,而其关键在于乙烯-醋酸乙烯共聚物(EVA)薄膜的处理。面向EVA处理提出了有氧热解方法,展开有氧热解失重特性、动力学及产物特性分析,结果表明:随着氧气浓度的增加,最大失重速率从1.8%(质量分数)/s增加到3.0%(质量分数)/s,EVA在较低温度下热分解更多且速率更快,整体有氧热解活化能呈现出下降的趋势。这是由于氧气的存在促进了氧化反应,加速了有氧热解过程。随着热解终温的升高,焦与油产率呈下降趋势,气产率则随之增加。在2%氧气浓度下,热解终温的提高有利于CH4、C2H6物质富集,有利于油中羧类物质转化为烷烃、烯烃及醇类,使得焦逐渐由非晶质结构朝芳香化与石墨化转变。
中图分类号:
丁湧, 李文建, 陈昭宇, 曹立辉, 刘轩铭, 任强强, 胡松, 向军. 废旧晶体硅光伏组件EVA有氧热解动力学与产物特性[J]. 化工学报, 2024, 75(9): 3310-3319.
Yong DING, Wenjian LI, Zhaoyu CHEN, Lihui CAO, Xuanming LIU, Qiangqiang REN, Song HU, Jun XIANG. Aerobic pyrolysis kinetic and product characteristics of waste crystalline silicon photovo ltaic modules’ EVA[J]. CIESC Journal, 2024, 75(9): 3310-3319.
工业分析/% | 元素分析/% | 高位 发热量/(MJ/kg) | |||||||
---|---|---|---|---|---|---|---|---|---|
M | V | FC | A | C | H | N | S | O① | |
0.22 | 97.61 | 2.12 | 0.04 | 77.83 | 10.51 | 2.14 | 0.01 | 9.24 | 14.15 |
表1 EVA工业分析和元素分析(质量分数,收到基)
Table 1 Industrial and elemental analysis of EVA (mass fraction, as received basis)
工业分析/% | 元素分析/% | 高位 发热量/(MJ/kg) | |||||||
---|---|---|---|---|---|---|---|---|---|
M | V | FC | A | C | H | N | S | O① | |
0.22 | 97.61 | 2.12 | 0.04 | 77.83 | 10.51 | 2.14 | 0.01 | 9.24 | 14.15 |
图2 不同升温速率及不同氧气浓度下EVA的有氧热解失重与失重速率曲线
Fig.2 Aerobic pyrolysis mass loss and mass loss rate curves of EVA under different heating rates and oxygen concentrations
氧气浓度 | E/(kJ/mol) | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
α=0.1 | α=0.2 | α=0.3 | α=0.4 | α=0.5 | α=0.6 | α=0.7 | α=0.8 | α=0.9 | ||
0 | 46.47 | 50.06 | 80.30 | 80.00 | 85.96 | 89.53 | 91.08 | 92.72 | 91.10 | 78.58 |
2% | 45.14 | 47.64 | 85.07 | 89.91 | 82.78 | 80.72 | 80.06 | 79.63 | 79.43 | 74.49 |
5% | 39.84 | 45.78 | 44.36 | 104.57 | 91.01 | 86.50 | 84.50 | 83.35 | 82.66 | 73.62 |
10% | 30.54 | 42.04 | 38.01 | 110.12 | 85.07 | 77.74 | 74.58 | 73.78 | 78.54 | 67.82 |
表2 不同氧气浓度下EVA有氧热解各转化率下的表观活化能及平均活化能
Table 2 Apparent activation energy and average activation energy of EVA aerobic pyrolysis at different oxygen concentrations
氧气浓度 | E/(kJ/mol) | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
α=0.1 | α=0.2 | α=0.3 | α=0.4 | α=0.5 | α=0.6 | α=0.7 | α=0.8 | α=0.9 | ||
0 | 46.47 | 50.06 | 80.30 | 80.00 | 85.96 | 89.53 | 91.08 | 92.72 | 91.10 | 78.58 |
2% | 45.14 | 47.64 | 85.07 | 89.91 | 82.78 | 80.72 | 80.06 | 79.63 | 79.43 | 74.49 |
5% | 39.84 | 45.78 | 44.36 | 104.57 | 91.01 | 86.50 | 84.50 | 83.35 | 82.66 | 73.62 |
10% | 30.54 | 42.04 | 38.01 | 110.12 | 85.07 | 77.74 | 74.58 | 73.78 | 78.54 | 67.82 |
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