Widening Synthesis Bottlenecks: Realization of Ultrafast and Continuous‐Flow Synthesis of High‐Silica Zeolite SSZ‐13 for NOx Removal1. (20th March 2015)

• Record Type: Journal Article
• Authors: Liu, Zhendong; Wakihara, Toru; Oshima, Kazunori; Nishioka, Daisuke; Hotta, Yuusuke; Elangovan, Shanmugam P.; Yanaba, Yutaka; Yoshikawa, Takeshi; Chaikittisilp, Watcharop; Matsuo, Takeshi; Takewaki, Takahiko; Okubo, Tatsuya
• Is Part Of: Angewandte Chemie. Volume 127:Number 19(2015)
• Page Start: 5775
• Page End: 5779
• Publication Date: 2015-03-20
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201501160
• Languages: English
• ISSNs: 0044-8249

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Characteristics of zeolite formation, such as being kinetically slow and thermodynamically metastable, are the main bottlenecks that obstruct a fast zeolite synthesis. We present an ultrafast route, the first of its kind, to synthesize high‐silica zeolite SSZ‐13 in 10 min, instead of the several days usually required. Fast heating in a tubular reactor helps avoid thermal lag, and the synergistic effect of addition of a SSZ‐13 seed, choice of the proper aluminum source, and employment of high temperature prompted the crystallization. Thanks to the ultra‐short period of synthesis, we established a continuous‐flow preparation of SSZ‐13. The fast‐synthesized SSZ‐13, after copper‐ion exchange, exhibits outstanding performance in the ammonia selective catalytic reduction (NH₃‐SCR) of nitrogen oxides (NO_{<italic>x</italic>}), showing it to be a superior catalyst for NO_{<italic>x</italic>} removal. Our results indicate that the formation of high‐silica zeolites can be extremely fast if bottlenecks are effectively widened.</p> </abstract>