响应面法优化双电层电极槐木炭的制备

doi:10.3969/j.issn.1673-5854.2023.03.009

生物质化学工程 ›› 2023, Vol. 57 ›› Issue (3): 61-65.doi: 10.3969/j.issn.1673-5854.2023.03.009

响应面法优化双电层电极槐木炭的制备

孔繁铸, 高丽娟(), 苏英杰, 赵开创, 钱程

辽宁科技大学化工学院, 辽宁鞍山 114051

收稿日期:2022-01-17 出版日期:2023-05-30 发布日期:2023-05-31
通讯作者: 高丽娟 E-mail:gaolijuan@ustl.edu.cn
作者简介:高丽娟, 教授, 研究领域: 煤焦油体系的分离分析、新型碳素材料及煤焦油的深加工利用; E-mail: gaolijuan@ustl.edu.cn
孔繁铸(2001—), 男, 辽宁大连人, 本科生, 主要从事生物质能源与碳材料相关工作
基金资助:
2022年辽宁科技大学大学生创新创业训练计划项目(无编号)

Optimization of Preparation Process of Locust Carbon as Electrical Double-layer Electrode Using Response Surface Methodology

Fanzhu KONG, Lijuan GAO(), Yingjie SU, Kaichuang ZHAO, Cheng QIAN

College of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China

Received:2022-01-17 Online:2023-05-30 Published:2023-05-31
Contact: Lijuan GAO E-mail:gaolijuan@ustl.edu.cn

摘要/Abstract

摘要：

以刺槐树枝为原料, 采用水蒸气活化法, 以电流密度1 A/g下的比电容为指标, 响应面法优化双电层电极活性炭的活化工艺, 并利用恒电流充/放电、循环伏安曲线和交流阻抗方法对所制得的双电层电极槐木炭的电化学性能进行研究。实验结果表明: 活化条件对活性炭比电容影响的显著性大小为活化温度＞水蒸气流量＞活化时间。制备双电层电极槐木炭的最佳工艺为1 g槐木炭, 活化温度674.85 ℃、活化时间82.42 min、水蒸气流量0.92 g/min, 模型预测比电容为133.2 F/g(电流密度1 A/g); 优化条件下制备的双电层电极槐木炭, 电阻较小, 导电性强, 其孔结构有利于离子的电极表面迁移, 在10~50 mV/s扫速范围内保持较好的双电层特性和倍率性能。

关键词: 刺槐树枝, 双电层电极材料, 比电容, 响应面法优化

Abstract:

Using Robinia pseudoacacia branches as raw materials, the activation process of activated carbon with double-layer electrode was optimized by response surface method using water vapor activation method and the mass specific capacitance at current density of 1A/g as the index. The electrochemical properties of the prepared double-layer electrode Robinia pseudoacacia carbon were studied by constant current charge/discharge, cyclic voltammetry curve and AC impedance methods. The experimental results showed that the best process for preparing the double-layer electrode Robinia pseudoacacia charcoal was that the activation temperature of 1 g charcoal was 674.85 ℃, the activation time was 82.42 min, the water vapor flow rate was 0.92 g/min, and the specific capacitance predicted by the model was 133.2 F/g. The significance of the activation conditions on the specific capacitance of activated carbon was: activation temperature>water vapor flow rate>activation time. The double-layer electrode prepared under the optimized conditions had low resistance and strong conductivity. Its pore structure was conducive to the migration of ions on the electrode surface, and maintains good double-layer characteristics and magnification performance in the range of 10-50 mV/s.

Key words: locust branches, electrical double-layer electrode material, specific capacitance, response surface methodology

中图分类号:

TQ35
TQ424.1

孔繁铸, 高丽娟, 苏英杰, 赵开创, 钱程. 响应面法优化双电层电极槐木炭的制备[J]. 生物质化学工程, 2023, 57(3): 61-65.

Fanzhu KONG, Lijuan GAO, Yingjie SU, Kaichuang ZHAO, Cheng QIAN. Optimization of Preparation Process of Locust Carbon as Electrical Double-layer Electrode Using Response Surface Methodology[J]. Biomass Chemical Engineering, 2023, 57(3): 61-65.

图/表 5

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参考文献 14

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序号 No.	X₁ 活化温度/℃ activation temperature	X₂ 活化时间/min activation time	X₃ 水蒸气流量/(g·min^-1) water vapor flow	Y 比电容(C_g)/(F·g^-1) specific capacitance
1	650	80	0.8	122
2	500	120	0.8	8
3	800	40	0.8	88
4	800	80	1.2	56
5	500	40	0.8	6
6	650	80	0.8	131
7	800	80	0.4	59
8	650	80	0.8	129
9	650	120	0.4	90
10	650	40	0.4	91
11	650	40	1.2	110
12	650	120	1.2	125
13	650	80	0.8	135
14	650	80	0.8	130
15	500	80	1.2	39
16	800	120	0.8	77
17	500	80	0.4	10

方差来源 source of variance	平方和 sum of squares	自由度 degree of freedom	均方 mean square	F值 F value	P值 P value	显著性 significant
模型 model	32 487.08	9	3 609.68	21.85	0.000 3	**
X₁	5 886.12	1	5 886.12	35.63	0.000 6	**
X₂	3.12	1	3.12	0.019	0.894 5
X₃	800.00	1	800.00	4.84	0.063 7
X₁ X₂	42.25	1	42.25	0.26	0.628 6
X₁ X₃	256.00	1	256.00	1.55	0.253 3
X₂ X₃	64.00	1	64.00	0.39	0.553 4
X₁²	22 947.92	1	22 947.92	138.90	< 0.000 1	**
X₂²	493.39	1	493.39	2.99	0.127 6
X₃²	894.44	1	894.44	5.41	0.052 9
残差 residual error	1 156.45	7	165.21	15.95	0.010 9	*
失拟误差 lack of fit error	1 067.25	3	355.75
纯误差 pure error	89.20	4	22.30
总误差 total error	33 643.53	16
R²	0.97
校正相关系数R_Adj²	0.92
信噪比 adeq prectsion	13.55

[1]	郭奇, 许伟, 刘军利. 木质素基活性炭氮掺杂改性及其电化学性能[J]. 生物质化学工程, 2022, 56(5): 15-22.
[2]	刘鑫, 马晓军. 氧化铌/木质活性碳纤维复合材料的结构性能表征[J]. 生物质化学工程, 2021, 55(2): 16-22.
[3]	侯敏, 孙康, 邓先伦, 肖凤龙, 杨华, 林冠烽. 椰壳基超级电容活性炭的制备及其电化学性能研究[J]. 生物质化学工程, 2016, 50(2): 13-18.

响应面法优化双电层电极槐木炭的制备

Optimization of Preparation Process of Locust Carbon as Electrical Double-layer Electrode Using Response Surface Methodology

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