Dry gel conversion synthesis of Cu/SSZ-13 as a catalyst with high performance for NH3-SCR

被引：15

作者：

Al Jabri, Hasna ^{[1
]}

Miyake, Koji ^{[2
]}

Ono, Kaito ^{[1
]}

Nakai, Masahiro ^{[1
]}

Inoue, Reina ^{[1
]}

Hirota, Yuichiro ^{[1
]}

Uchida, Yoshiaki ^{[1
]}

Wang, Yunan ^{[3
]}

Nishitoba, Toshiki ^{[3
]}

Yokoi, Toshiyuki ^{[3
]}

Ohnishi, Takeshi ^{[4
]}

Ogura, Masaru ^{[4
]}

Nishiyama, Norikazu ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch Engn Sci, Div Chem Engn, 1-3 Machikaneyama, Toyonaka, Osaka 5608531, Japan

[2] Shizuoka Univ, Fac Engn, Dept Appl Chem & Biochem Engn, Naka Ku, 3-5-1 Johoku, Hamamatsu, Shizuoka 4328561, Japan

[3] Tokyo Inst Technol, Inst Innovat Res, Midori Ku, 4259 Nagatsuta, Yokohama, Kanagawa 2268503, Japan

[4] Univ Tokyo, Inst Ind Sci, Tokyo 1538505, Japan

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2020年 / 297卷 / 297期

关键词：

SSZ-13; Dry gel conversion; NH3-SCR; SMALL-PORE ZEOLITES; NITRIC-OXIDE; HYDROTHERMAL STABILITY; REDUCTION; NOX; AMMONIA; SCR; SITES; NH3; DESIGN;

D O I：

10.1016/j.micromeso.2019.109780

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Selective catalytic reduction (SCR) of NOx with zeolite catalysts has been reported as the most promising technique for the removal of NOx from diesel engine exhaust. In this research, SSZ-13 zeolite doped with Cu species was synthesized by dry gel conversion (DGC) method and applied as a catalyst for NH3-SCR. The obtained Cu/SSZ-13 was characterized using X-ray diffraction (XRD), Energy-Dispersive X-ray (EDX), Scanning Electron Microscopy (SEM), NMR spectroscopy, ESR spectroscopy, nitrogen adsorption. Cu/SSZ-13 synthesized by DGC method has higher crystallinity and porosity than that synthesized by conventional hydrothermal synthesis (HTS) method. Due to its higher crystallinity and porosity, higher amount of Cu ions was introduced into SSZ-13 synthesized by DGC method, leading to a higher catalytic performance for the SCR of NOx compared with Cu/SSZ-13 prepared by HTS. In addition, Cu/SSZ-13 synthesized by DGC method showed higher hydrothermal stability.

引用

页数：6

共 49 条

[1] Synthesis of high silica SSZ-13 in fluoride-free media by dry gel conversion method [J].