基于吸附剂/木浆纤维纸耦合材料的空气净化

doi:10.11949/0438-1157.20201486

摘要/Abstract

摘要：

随着人们对室内环境质量的要求越来越高，空气净化技术已成为日益重要的研究课题。提出了一种以木浆纤维纸为基材，通过浸渍的方法将吸附剂耦合于其表面的新型空气净化材料制备技术，并对其性能进行了测试和分析。首先，制备了具有不同上胶量的木浆纤维纸并测试了它们的苯吸附性能。结果显示，浸渍硅胶三次的木浆纤维纸为最优的材料，其具有较高的吸附量及良好的稳定性。此外，在相对压力低于0.5时，苯的静态吸附试验数据和动态吸附试验数据可以分别用Freundlich模型和LDF模型较好地拟合，它们的相关系数平方R²分别不小于0.97和0.94。在吸附CO₂方面，使用硅胶作为黏合剂，将13X分子筛粉末涂覆于纤维纸表面，得到的复合纤维纸材料在15 kPa和100 kPa下的CO₂吸附量分别可达到1.17 mmol/g和1.92 mmol/g。可见，使用本材料可有效地对气体进行捕集处理，为制作空气过滤网提供思路和参考。

关键词: 木浆纤维纸, 苯, 二氧化碳, 浸渍, 吸附剂

Abstract:

With the increasing demand for indoor environmental quality, air purification technology has become an indispensable project. In this paper, a new preparation technology of air purification material based on wood pulp fiber paper is proposed. The adsorbent is coupled to its surface by impregnation method, and its performance is tested and studied. Firstly, wood pulp fiber paper impregnated with different quality silica gel is prepared and their benzene adsorption properties are tested. The results show that the wood pulp fiber paper impregnated by silica gel three times has high adsorption capacity and good material stability, so we conclude that for benzene adsorption, the best impregnation times are three times. In addition, when the relative pressure is lower than 0.5, the static experimental data and dynamic experimental data of benzene adsorption can be well fitted by Freundlich model and LDF model, and their square correlation coefficients R² are greater than 0.97 and 0.94 respectively. As for CO₂ adsorption, silica gel was used as adhesive to coat 13X molecular sieve powder on the surface of fiber paper. The material shows good CO₂ capture performance and stability. The CO₂ adsorption capacity of the composite fiber paper material at 15 kPa and 100 kPa can reach 1.17 mmol/g and 1.92 mmol/g respectively. It can be seen that this material can effectively capture different gas and provide ideas and reference for the production of air filter.

Key words: wood pulp fiber paper, benzene, carbon dioxide, impregnation, adsorbent

中图分类号:

X 131.1

吴俊晔, 葛天舒, 吴宣楠, 代彦军, 王如竹. 基于吸附剂/木浆纤维纸耦合材料的空气净化[J]. 化工学报, 2021, 72(S1): 520-529.

WU Junye, GE Tianshu, WU Xuannan, DAI Yanjun, WANG Ruzhu. Indoor air purification based on adsorbent/wood pulp fiber paper coupling material[J]. CIESC Journal, 2021, 72(S1): 520-529.

图/表 14

图1 原木浆纤维纸

Fig.1 Raw wood pulp fiber paper

表1 木浆纤维纸的参数及对应的硅胶涂覆量

Table 1 Parameters of wood pulp fiber paper and their silica gel coating amount

样品

尺寸/mm²

原纸质量/g

单位面积上胶量/

(g/m²)

图2 不同方法处理后的纤维纸照片

Fig.2 Photos of wood pulp fiber paper treated by different methods

图3 各样品的扫描电镜照片

Fig.3 SEM micrographs of each sample

图4 样品在-195.80℃下的氮气吸附/解吸等温线

Fig.4 Nitrogen adsorption/desorption isotherms of samples at -195.80℃

图5 样品的比表面积

Fig.5 Specific surface area of samples

图6 样品的孔径分布曲线

Fig.6 Pore distribution of samples

图7 样品的苯吸附等温线

Fig.7 Benzene adsorption isotherm of samples

图8 样品W2苯吸附数据的拟合曲线及相关系数

Fig.8 Fitting curve and correlation coefficient of W2 benzene adsorption data

表2 各样品的拟合参数及平方相关系数

Table 2 Fitting parameters and square correlation coefficients of each sample

样品	a	b	R₁²
W1	154.98	1.0752	0.9947
W2	199.35	1.1061	0.9942
W3	202.21	1.1183	0.9927
纯硅胶	377.31	1.3018	0.9760

图9 各样品的苯动态吸附曲线及拟合数据

Fig.9 Benzene dynamic adsorption curve and fitting data of each sample

表3 各样品在25℃、0.1相对压力下的拟合参数及平方相关系数

Table 3 Fitting parameters and square correlation coefficient of each sample at 25℃ and 0.1 relative pressure

样品	M(mg/g)	k/min^-1	$R 22$
W1	14.88292	0.09256	0.97699
W2	18.29658	0.09426	0.98660
W3	19.57589	0.08670	0.99608
纯硅胶	32.61482	0.31696	0.94180

表3 各样品在25℃、0.1相对压力下的拟合参数及平方相关系数

Table 3 Fitting parameters and square correlation coefficient of each sample at 25℃ and 0.1 relative pressure

样品	M(mg/g)	k/min^-1	$R 22$
W1	14.88292	0.09256	0.97699
W2	18.29658	0.09426	0.98660
W3	19.57589	0.08670	0.99608
纯硅胶	32.61482	0.31696	0.94180

图10 样品的光学显微镜照片

Fig.10 Optical microscope photos of samples

图11 各样品在25℃的CO2吸附等温线

Fig.11 CO2 adsorption isotherm of each sample at 25℃(1 bar=105 Pa)

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