载银介孔SBA-15吸附剂的制备及其对脂肪酸甲酯的吸附研究

doi:10.3969/j.issn.1673-5854.2019.03.001

Abstract

Abstract:

The mesoporous Ag⁺-APTS/SBA-15 adsorbent was prepared by surface modification of 3-aminopropyltriethoxysilane (APTS) and loading silver ion with the mesoporous molecular sieve SBA-15 as support. The adsorbent was characterized by nitrogen adsorption-desorption, X-ray diffraction(XRD), Fourier transform infrared spectroscopy(FT-IR), transmission electron microscopy(TEM), and scanning electron microscopy-energy spectrum(SEM-EDS). The adsorbent was applied to separating the mixed fatty acid methyl esters to investigate its adsorption properties. The results of nitrogen adsorption-desorption, XRD and TEM showed that the adsorbent had regular ordered pore structure; FT-IR data showed that the surface of mesoporous SBA-15 was successfully modified by APTS; SEM-EDS results showed that silver ion was successfully loaded onto the support SBA-15. The adsorbent had good adsorptive effect on unsaturated fatty acid methyl esters(UFAMEs), with the increase of loading amount of silver ion and the double-bond number of UFAMEs, the adsorption capacity of adsorbent increased gradually for the UFAMEs. When the silver ion loading amount was 25%, the adsorption rate of methyl linolenate on the adsorbent got to 53.47%.

Key words: 3-aminopropyltriethoxysilane, silver ion, unsaturated fatty acid methyl ester

CLC Number:

TQ35

Bo CHEN,Yuanbo HUANG,Peiyan WANG,Shouqing LIU,Delu NING,Zhifeng ZHENG. Preparation of Silver Ion-loaded Mesoporous SBA-15 Adsorbent and Its Application in Adsorption of Fatty Acids Methyl Ester[J]. Biomass Chemical Engineering, 2019, 53(3): 1-7.

Figures/Tables 9

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References 21

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样品 sample	S_BET/(m²·g^-1)	总孔容/(cm³·g^-1) pore volume	平均孔径/nm pore size
SBA-15	651.05	0.87	6.14
APTS/SBA-15	418.86	0.67	6.04
15% Ag⁺-APTS/SBA-15	363.23	0.68	6.83
20% Ag⁺-APTS/SBA-15	335.50	0.63	6.74
25% Ag⁺-APTS/SBA-15	307.05	0.58	6.81

吸附剂 adsorbent	吸附率adsorption rate/%
吸附剂 adsorbent	棕榈酸甲酯 methyl palmitate	硬脂酸甲酯 methyl stearate	油酸甲酯 methyl oleate	亚油酸甲酯 methyl linoleate	亚麻酸甲酯 methyl linolenate
SBA-15	2.38	3.65	2.67	6.67	1.33
APTS/SBA-15	1.57	1.20	9.10	5.45	3.64
15% Ag⁺-APTS/SBA-15	2.04	1.75	8.50	16.67	17.35
20% Ag⁺-APTS/SBA-15	2.12	2.46	10.62	17.36	30.47
25% Ag⁺-APTS/SBA-15	3.61	2.44	13.47	18.78	53.47

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Preparation of Silver Ion-loaded Mesoporous SBA-15 Adsorbent and Its Application in Adsorption of Fatty Acids Methyl Ester

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