晶种法合成UZM-9分子筛及其CO2/CH4/N2吸附分离性能

韦小丽; 孙天军; 柯权力; 刘小伟; 王树东

晶种法合成UZM-9分子筛及其CO₂/CH₄/N₂吸附分离性能

韦小丽^{1, 2},
孙天军¹,
柯权力^{1, 2},
刘小伟^{1, 2},
王树东^1, ,

1.
中国科学院大连化学物理研究所洁净能源国家实验室, 辽宁大连 116023
2.
中国科学院大学, 北京 100049

基金项目:

国家自然科学基金 21476231

详细信息

通讯作者:
王树东, Tel: 0411-8379052, E-mail: wangsd@dicp.ac.cn, suntianjun@dicp.ac.cn

中图分类号: TE624.9
计量
- 文章访问数: 136
- HTML全文浏览量: 47
- PDF下载量: 16
- 被引次数: 0
出版历程
- 收稿日期: 2017-03-30
- 修回日期: 2017-05-05
- 网络出版日期: 2021-01-23
- 刊出日期: 2017-07-10

Adsorptive separation properties of CO₂/CH₄/N₂ on UZM-9 synthesized by seed-assisted method

WEI Xiao-li^{1, 2},
SUN Tian-jun¹,
KE Quan-li^{1, 2},
LIU Xiao-wei^{1, 2},
WANG Shu-dong^{1
, ,}

1.
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Funds:

the National Natural Science Foundation of China 21476231

摘要

摘要: 以TEAOH和TMAOH为有机模板剂，酸处理的UZM-9分子筛为晶种，采用水热法在48 h内合成出分子筛UZM-9，并对其CO₂/CH₄/N₂的吸附分离性能进行了研究。采用XRD、ICP、TG、SEM与气体吸附等手段对晶种法合成的UZM-9分子筛结构、耐水稳定性与吸附性能进行了研究。结果表明，晶种法可以在2 d内合成出硅铝原子比在3以上、收率达到65%的UZM-9分子筛；所得分子筛的CO₂吸附容量可以达到5 mmol/g以上，吸附热为34 kJ/mol，CO₂/CH₄、CO₂/N₂与CH₄/N₂的平均分离因子分别为100、240与2.4，CO₂分离性能优良且具有一定耐水性能。
- 酸处理晶种 /
- UZM-9 /
- 吸附分离性能 /
- 二氧化碳 /
- 吸附热
Abstract: The UZM-9 zeolite was synthesized in 48 h via a seed-assisted method, in which TEAOH and TMAOH were used as organic structure directing agent (OSDA) while acid-treated UZM-9 zeolites were employed as seeds. The textural properties and hydrophobicity of the as synthesized UZM-9 zeolites and their adsorption properties for CO₂/CH₄/N₂ were characterized by XRD, physical adsorption, SEM, ICP and TG, respectively. The results show that UZM-9 zeolites can be obtained in 2 d with the Si/Al atomic ratio up to 3 and the yield up to 65%. At 298 K and 1atm, the capacity and adsorption heat of CO₂ are 5 mmol/g and 34 kJ/mol, and the selectivity of CO₂/CH₄, CO₂/N₂ and CH₄/N₂ are 100, 240 and 2.4 respectively. These results reveal that the as synthesized UZM-9 zeolites have good performances for carbon capture and possess considerable water resistance.
- acid-treated seed /
- UZM-9 /
- adsorptive separation properties /
- CO₂ /
- adsorption heat

HTML全文

图 1 UZM-9分子筛以及酸处理晶种的XRD谱图

Figure 1 XRD patterns of the as-prepared zeolite, acid treated seed and zeolite prepared by seed assisted method

a: 0.3-seed; b: 14d-UZM-9; c: 0.3-UZM-9

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图 2 UZM-9分子筛的SEM照片

Figure 2 Typical SEM images of the synthesized zeolites

(a): 14d-UZM-9; (b): 0.3-UZM-9

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图 3 UZM-9分子筛的热重曲线

Figure 3 TG curves of UZM-9 zeolites

a: 0.3-seed; b: 14d-UZM-9; c: 0.3-UZM-9

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图 4 0.3-UZM-9分子筛水处理前后的XRD谱图

Figure 4 XRD patterns of zeolite 0.3-UZM-9

a: before water treatment; b: after water treatment

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图 5 水吸附循环处理前后0.3-UZM-9分子筛的Ar吸附等温线

Figure 5 Ar adsorption-desorption isotherms of 0.3-UZM-9 zeolite before and after water treatment

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图 6 分子筛0.3-UZM-9水处理前后的孔径分布

Figure 6 Pore size distribution of 0.3-UZM-9 before and after water treatment

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图 7 0.3-UZM-9分子筛水处理前后的CO₂、CH₄与N₂在不同温度下的吸附等温线

Figure 7 Adsorption isotherms for CO₂, CH₄ and N₂ on 0.3-UZM-9 zeolite at 288, 298 and 308 K: before (square) and after (circle) water treatment

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表 1 分子筛的结构表征及收率

Table 1 Characteristic results and yields of zeolites

表 2 水处理前后分子筛0.3-UZM-9孔结构的变化

Table 2 The textural properties of 0.3-UZM-9 before and after water treatment

表 3 水处理前后分子筛0.3-UZM-9的分离性能

Table 3 Separation performances of 0.3-UZM-9 zeolite before and after water treatment

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