负载型氨基酸离子液体的制备及其对二氧化碳的吸附性能

杨刚胜; 曾淦宁; 赵强; 陈徐; 陈盛积; 艾宁

负载型氨基酸离子液体的制备及其对二氧化碳的吸附性能

杨刚胜^{1, 2},
曾淦宁³,
赵强¹,
陈徐³,
陈盛积¹,
艾宁^{1, 2, ,}

1.
浙江工业大学化学工程学院, 浙江杭州 310014
2.
浙江省生物燃料利用技术研究重点实验室, 浙江杭州 310014
3.
浙江工业大学海洋学院, 浙江杭州 310014

基金项目:

浙江省科技厅公益项目 2013C33005

详细信息

通讯作者:
艾宁, Tel:0571-88320870, E-mail:aining@zjut.edu.cn

中图分类号: TQ028
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- 被引次数: 0
出版历程
- 收稿日期: 2015-07-24
- 修回日期: 2015-09-29
- 网络出版日期: 2022-03-23
- 刊出日期: 2016-01-01

Preparation of silica gel supported amino acid ionic liquids and their performance capacity towards carbon dioxide

1.
College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
2.
Zhejiang Province Key Laboratory of Biofuel, Hangzhou 310014, China
3.
Ocean College, Zhejiang University of Technology, Hangzhou 310014, China

Funds:

The project was supported by the Public Welfare Project of Science and Technology Department of Zhejiang Province 2013C33005

More Information

Corresponding author: AI Ning, Tel:0571-88320870, E-mail:aining@zjut.edu.cn

摘要

摘要: 采用浸渍蒸发法将四甲基铵甘氨酸([N₁₁₁₁][Gly]) 和四甲基铵赖氨酸([N₁₁₁₁][Lys]) 两种离子液体分别负载到硅胶(SG) 表面, 利用EA、TGA、BET和FT-IR等技术对所得到的吸附剂进行表征, 考察了离子液体种类、离子液体负载量和温度等条件对其CO₂吸附性能的影响。结果表明, 离子液体成功负载到硅胶表面, 所制得的负载型氨基酸离子液体对二氧化碳具有良好的吸附性能。在所考察的温度范围(303.15-323.15 K) 内, 温度越高, 平衡吸附量越小; 在负载量为10%-60%, 随着负载量的增加, 平衡吸附量先增加后减小。对于[N₁₁₁₁][Gly]/SG, 当负载量为22.4%(质量分数)、吸附温度为30 ℃、压力为0.1 MPa时, 二氧化碳的平衡吸附量可达到41 mg/g (相对于1 mol AAILs吸附0.62 mol CO₂), 而且, 吸附20 min即可达到平衡吸附量的90%。吸附剂在循环使用六次之后, 其结构与性能均保持良好。
- 氨基酸离子液体 /
- 二氧化碳捕集 /
- 负载 /
- 浸渍蒸发法
Abstract: Two amino acid ionic liquids (AAILs), viz., tetramethyl ammonium glycinate ([N₁₁₁₁][Gly]) and tetramethyl ammonium lysine ([N₁₁₁₁][Lys]) were supported on porous silica gel through impregnation evaporation method and used as the adsorbents for carbon dioxide. They were characterized by elemental analysis (EA), thermogravimetric analysis (TGA), nitrogen physisorption and Fourier transform infrared (FT-IR) spectroscopy; the effects of AAIL type, loading and temperature on their adsorption capacity towards carbon dioxide were investigated. The results illustrate that AAILs are successfully immobilized into the porous silica gel and the supported sorbents exhibit excellent performance towards carbon dioxide, i.e. fast adsorption rate and high capacity. At 303.15-323.15 K, the adsorption capacity reduces with the increase of temperature, whereas there is a optimal loading of ionic liquids to get highest adsorption capacity towards carbon dioxide. Under 30 ℃ and 0.1 MPa, the [N₁₁₁₁][Gly]/SG adsorbent with a [N₁₁₁₁][Gly] loading of 22.4% exhibits the highest CO₂ capture capacity, i.e. 41 mg/g, equivalent to 0.62 mol CO₂ per mol AAILs; moreover, 90% of the equilibrium adsorption amount can be achieved in 20 min. Furthermore, no obvious decrease in the adsorption capacity is observed after recycling for six times.
- amino acid ionic liquids /
- CO₂ capture /
- support /
- impregnation evaporation method

HTML全文

图 1 [N₁₁₁₁][Gly]/SG的红外光谱谱图

Figure 1 FT-IR spectra of pure SG (a), [N₁₁₁₁][Gly]/SG (b) and [N₁₁₁₁][Gly]/SG (c) after regeneration

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图 2 [N₁₁₁₁][Gly]/SG的TG和DTG曲线

Figure 2 TG and DTG curves of [N₁₁₁₁][Gly]/SG

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图 3 [N₁₁₁₁][Gly]/SG的离子液体负载量对CO₂吸附效果的影响

Figure 3 CO₂ adsorption of [N₁₁₁₁][Gly]/SG sorbents with different ionic liquid loadings

a: 0%;b: 8.6%;c: 16%;d: 22.4%;e: 23.4%;f: 34%;g: 57.3%

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图 4 温度、离子液体负载量对CO₂吸附量的影响

Figure 4 CO₂ adsorption capacities of the sorbents with various ionic liquid loadings at different temperatures

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图 5 温度对吸附剂平衡吸附量的影响

Figure 5 Equilibrium adsorption capacities of various absorbent towards CO₂ at different temperatures

a: 16.0% [N₁₁₁₁][Gly]; b: 22.4% [N₁₁₁₁][Gly]; c: 26.7% [N₁₁₁₁][Gly];
d: 8.6% [N₁₁₁₁][Lys]; e: 16.2% [N₁₁₁₁][Lys]; f: 28.3% [N₁₁₁₁][Lys]

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图 6 [N₁₁₁₁][Gly]/SG吸附剂的质量和温度随时间的变化

Figure 6 TGA mass and temperature curves against time for [N₁₁₁₁][Gly]/SG sorbent

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表 1 不同离子液体负载量制得吸附剂的元素组成

Table 1 Elementary composition of the sorbents loading with different ionic liquid contents

Sample	Element content w/%			Loading w/%(EA)	Loading w/%(TG)
Sample	C	H	N	Loading w/%(EA)	Loading w/%(TG)
SG	0.09	0.738	0.04	0.00	0.00
[N₁₁₁₁][Gly]/SG=1：5	8.54	2.839	3.01	16.04	16.01
[N₁₁₁₁][Gly]/SG=1：3	13.90	4.521	5.00	26.64	26.67
[N₁₁₁₁][Lys]/SG=1：5	9.51	2.616	3.15	16.45	16.18
[N₁₁₁₁][Lys]/SG=1：3	14.72	4.234	4.88	25.48	25.27

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表 2 不同负载量制得吸附剂的结构参数

Table 2 Textual properties of the sorbents loading with different ionic liquid contents

[N₁₁₁₁][Gly]/SG				[N₁₁₁₁][Lys]/SG
loading w/%	A_p /(m²·g^-1)	v_p /(cm³·g^-1)	d_p /nm	loading w/%	A_p /(m²·g^-1)	v_p /(cm³·g^-1)	d_p /nm
0.00	348.741 2	1.052	7.66	0.00	348.741 2	1.052	7.66
8.63	286.897 5	0.952	7.12	8.56	278.346 7	0.974	7.40
16.01	268.357 8	1.399 1	11.51	16.18	224.528	0.966 9	9.54
26.67	140.036 8	1.083 2	15.78	28.27	150.876 9	0.822 5	11.40
33.72	78.110 4	0.726 1	18.40	37.44	79.346 9	0.629 1	15.09
44.51	23.456 9	0.268 2	18.75	47.51	10.479	0.177 6	22.16
57.34	4.076 8	0.081 4	21.87	-	-	-	-

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表 3 不同吸附剂CO₂吸附性能对比

Table 3 Comparison of different adsorbents in their adsorption performance towards CO₂

Support	Ionic liquid	Number of amino	Loading w/%	t/℃	C_s^a/(mg·g^-1)	C_s^b(mol ratio)	Ref.
SG	[N₁₁₁₁][Gly]	1	22.4	30	41	0.62	this work
SG	[N₁₁₁₁][Lys]	2	8.6	30	21	1.22	this work
SG	[NH₃P-mim][BF₄]	1	39.3	30	-	0.3	[15]
SG	[AEMP][Gly]	3	20	30	-	1.5	[23]
SG	[apaeP₄₄₄][Gly]	3	32.4	25	72.6	1.29	[14]
SG	[apaeP₄₄₄][Lys]	4	32.4	25	82.3	1.73	[14]
Al₂O₃	[MEA]L	1	20	30	1.32	-	[16]
AC	[NH₃P-mim][BF₄]	1	20	30	2.77	-	[16]
PAI	[BMIM][Tf₂N]	0	13.4	35	10.12	-	[25]
Sepiolite	[Bmim][BF₄]	1	13	0	19.2	-	[26]
PMMA	[EMIM][Lys]	2	48.7	40	73.48	0.87	[27]
PMMA	[EMIM][Gly]	1	48.7	40	67.32	0.49	[27]
note: C_s^a: CO₂ adsorption capacity (mg CO₂/g sorbent); C_s^b: CO₂ adsorption capacity (mol CO₂/mol AAILs)

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