基于碱/尿素溶解体系的自黏结颗粒活性炭的制备

doi:10.3969/j.issn.0253-2417.2020.03.017

林产化学与工业 ›› 2020, Vol. 40 ›› Issue (3): 130-134.doi: 10.3969/j.issn.0253-2417.2020.03.017

• 研究报告 • 上一篇

基于碱/尿素溶解体系的自黏结颗粒活性炭的制备

杨旋¹(),何晨露¹,熊永志¹,林冠烽^1,²,陈燕丹¹,黄彪^1,*()

1. 福建农林大学材料工程学院, 福建福州 350002
2. 福建农林大学金山学院, 福建福州 350002

收稿日期:2020-01-14 出版日期:2020-06-28 发布日期:2020-06-29
通讯作者: 黄彪 E-mail:fafuyxYX@163.com;bhuang@fafu.edu.cn
作者简介:杨旋(1994-),男,湖北襄阳人,博士生,研究方向为生物质能源与炭材料; E-mail:fafuyxYX@163.com
基金资助:
国家重点研发计划资助项目(2017YFD0601006);国家自然科学基金资助项目(31770611);福建省科技计划资助项目(2017N5001)

Preparation of Self-bonding Granular Activated Carbon by Alkali/Urea Dissolution System

Xuan YANG¹(),Chenlu HE¹,Yongzhi XIONG¹,Guanfeng LIN^1,²,Yandan CHEN¹,Biao HUANG^1,*()

1. College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China
2. Jinshan College, Fujian Agriculture and Forestry University, Fuzhou 350002, China

Received:2020-01-14 Online:2020-06-28 Published:2020-06-29
Contact: Biao HUANG E-mail:fafuyxYX@163.com;bhuang@fafu.edu.cn

摘要/Abstract

摘要：

基于碱/尿素体系的纤维素大分子溶解机理，以杉木屑为原料制备自黏结颗粒活性炭；讨论了不同活化温度、碱/尿素比例和有无冷冻条件对颗粒活性炭耐磨强度和吸附性能的影响。结果表明：随着活化温度升高，活性炭的耐磨强度和吸附性能逐渐提高；在碱和尿素的共同作用下，冷冻有利于促进活性炭孔隙结构发达，吸附性能提高。在活化温度900℃、碱/尿素质量比14：36且冷冻12 h的最佳条件下，颗粒活性炭的耐磨强度、碘吸附值、亚甲基蓝吸附值、比表面积、总孔容积和平均孔径分别为99.12%、1 204 mg/g、232 mg/g、1 365 m²/g、0.86 cm³/g和2.46 nm。

关键词: 碱/尿素体系, 耐磨强度, 吸附性能, 孔隙结构

Abstract:

Based on the dissolution mechanism of cellulose macromolecules in alkali/urea system, self-bonding granular activated carbon was prepared with Chinese fir as raw material. The effects of different activation temperature, alkali/urea ratio and freezing conditions on the abrasion resistance and adsorption performance of granular activated carbon were discussed. The results showed that as the activation temperature increased the abrasion resistance and adsorption performance of activated carbon increased. Under the combination effect of alkali and urea, freezing process was beneficial to promote the development of activated carbon pore structure and improve the adsorption performance. Under the optimal conditions of the activation temperature 900℃, the alkali/urea mass ratio 14:36 and freezing time for 12 h, the abrasion resistance, iodine adsorption value, methylene blue adsorption value, specific surface area, total pore volume and average pore diameter of granular activated carbon were 99.12%, 1 204 mg/g, 232 mg/g, 1 365 m²/g, 0.86 cm³/g, and 2.46 nm.

Key words: alkali/urea system, abrasion resistance, adsorption performance, pore structure

中图分类号:

TQ35
TQ424.1

杨旋,何晨露,熊永志,林冠烽,陈燕丹,黄彪. 基于碱/尿素溶解体系的自黏结颗粒活性炭的制备[J]. 林产化学与工业, 2020, 40(3): 130-134.

Xuan YANG,Chenlu HE,Yongzhi XIONG,Guanfeng LIN,Yandan CHEN,Biao HUANG. Preparation of Self-bonding Granular Activated Carbon by Alkali/Urea Dissolution System[J]. Chemistry and Industry of Forest Products, 2020, 40(3): 130-134.

图/表 4

表1

表2

图1

表3

参考文献 18

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条件 conditions		耐磨强度/% abrasion resistance	碘吸附值/(mg·g^-1) iodine adsorption value	亚甲蓝吸附值/(mg·g^-1) methylene blue adsorption value
活化温度 activation temperature	700 ℃	97.64	404	52
	750 ℃	98.12	636	98
	800 ℃	98.46	819	126
	850 ℃	98.64	1056	154
	900 ℃	99.12	1204	232
NaOH用量 NaOH dosage	7%	98.56	964	141
	14%	99.12	1204	232
	21%	98.76	1075	144
	28%	98.24	955	116
	35%	97.72	780	98
尿素用量 urea dosage	12%	97.86	726	53
	24%	98.54	967	117
	36%	99.12	1204	232
	48%	98.46	1089	162
	60%	98.18	890	120

样品 samples	m(NaOH):m(尿素) m(NaOH):m(urea)	冷冻 freezing	耐磨强度/% abrasion resistance	碘吸附值/(mg·g^-1) iodine adsorption value	亚甲蓝吸附值/(mg·g^-1) methylene blue adsorption value
AC₀	14:0	是yes	97.62	864	114
AC₁	14:36	是yes	99.12	1204	232
AC_N	14:36	否no	98.42	1074	136

样品 samples	S_BET/ (m²·g^-1)	总孔容/(cm³·g^-1) total pore volume	微孔孔容/(cm³·g^-1) micropore volume	介孔孔容/(cm³·g^-1) mesopore volume	平均孔径/nm average pore size
AC₀	954	0.48	0.20	0.28	1.79
AC₁	1365	0.86	0.34	0.52	2.46
AC_N	1132	0.74	0.29	0.45	2.32

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基于碱/尿素溶解体系的自黏结颗粒活性炭的制备

Preparation of Self-bonding Granular Activated Carbon by Alkali/Urea Dissolution System

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