Construction of Paired Al Sites in High-silica MFI-type Zeolite Framework via Transcription-induced Method

被引：0

作者：

Imamsto, Yoshiyasu ^{[1
]}

Osuga, Ryota ^{[2
]}

Muramatsu, Atsushi ^{[1
,3
]}

Yabushita, Mizuho ^{[4
]}

机构：

[1] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, 2-1-1 Katahira,Aoba Ku, Sendai 9808577, Japan

[2] Hokkaido Univ, Inst Catalysis, Kita 21 Nishi 10,Kita Ku, Sapporo 0010021, Japan

[3] Tohoku Univ, Int Ctr Synchrotron Radiat Innovat Smart SRIS, 2-1-1 Katahira,Aoba Ku, Sendai 9808577, Japan

[4] Tohoku Univ, Sch Engn, Dept Appl Chem, 6-6-07 Aoba,Aoba Ku, Sendai 9808579, Japan

来源：

JOURNAL OF THE JAPAN PETROLEUM INSTITUTE | 2023年 / 66卷 / 06期

关键词：

Paired aluminum site; Transcription-induced method; Cobalt ion exchange; High-silica zeolite; MFI-type framework; PENTASIL-CONTAINING ZEOLITES; CO2+ ION SITES; AL-27; NMR-SPECTROSCOPY; ZSM-5; ALUMINUM; OCCUPATION; SUBSTITUTION; ADSORPTION; CONVERSION; RESOLUTION;

D O I：

10.1627/jpi.66.246

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Paired Al sites were formed in high-silica MFI-type zeolite frameworks with Si/Al molar ratios of 11-13 via the transcription-induced method, where Al-rich amorphous silica-alumina enriched with paired Al species was employed as a zeolite precursor. Quantification by the Co' titration technique demonstrated that the aging time for the precursor in synthesis gels prior to the hydrothermal treatment was the key to controlling the amount of paired Al sites in the MFI-type frameworks. Ultraviolet-visible spectra of the Coe+-exchanged MFI-type zeolites indicated that the paired Al sites captured bare Co' without any oxygen-containing ligands and also that most of the paired Al sites were present at the channel intersections of the MFI-type framework.

引用

页码：246 / 253

页数：8

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