scholarly journals Polytype distributions in low-defect zeolite beta crystals synthesized without an organic structure-directing agent

2016 ◽  
Vol 225 ◽  
pp. 210-215 ◽  
Author(s):  
Yukichi Sasaki ◽  
Yoko Yoshida ◽  
Craig A.J. Fisher ◽  
Takuji Ikeda ◽  
Keiji Itabashi ◽  
...  
Keyword(s):  
Zeolite Beta ◽  
Structure Directing Agent ◽  
Organic Structure

scholarly journals Mechanism of seeding in hydrothermal synthesis of zeolite Beta with organic structure-directing agent-free gel

2014 ◽  
Vol 35 (11) ◽  
pp. 1800-1810 ◽  
Author(s):  
Bumei Zheng ◽  
Yufeng Wan ◽  
Weiya Yang ◽  
Fengxiang Ling ◽  
Hong Xie ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Zeolite Beta ◽  
Structure Directing Agent ◽  
Organic Structure

Structure-directing study of 1-methylimidazolium-based dication with tetramethylene as spacer length in the synthesis of microporous silicoaluminophosphates

2021 ◽  
Author(s):  
Thayara Kellen Tavares ◽  
Gabrielli Almeida ◽  
Yuri Variani ◽  
Katia Bernardo-Gusmão ◽  
Paloma Vinaches ◽  
...  
Keyword(s):  
Structure Directing Agent ◽  
Spacer Length ◽  
Organic Structure ◽  
Directing Effect

In this work we study the structure-directing effect of 1-methylimidazolium-based dications with four methylene units as spacer length (4BI), as Organic Structure-Directing Agent (OSDA) in the synthesis of silicoaluminophosphate (SAPO)...

scholarly journals AFX Zeolite for Use as a Support of NH3-SCR Catalyst Mining through AICE Joint Research Project of Industries–Academia–Academia

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 163
Author(s):  
Masaru Ogura ◽  
Yumiko Shimada ◽  
Takeshi Ohnishi ◽  
Naoto Nakazawa ◽  
Yoshihiro Kubota ◽  
...  
Keyword(s):  
High Performance ◽  
Ionic Species ◽  
Research Project ◽  
Joint Research ◽  
Structure Directing Agent ◽  
Scr Catalyst ◽  
Organic Structure ◽  
Nh3 Scr ◽  
Joint Research Project ◽  
The One

This paper introduces a joint industries–academia–academia research project started by researchers in several automobile companies and universities working on a single theme. Our first target was to find a zeolite for NH3-SCR, that is, zeolite mining. Zeolite AFX, having the same topology of SSZ-16, was found to be the one of the zeolites. SSZ-16 can be synthesized by using an organic structure-directing agent such as 1,1′-tetramethylenebis(1-azonia-4-azabicyclo[2.2.2]octane; Dab-4, resulting in the formation of Al-rich SSZ-16 with Si/Al below five. We found that AFX crystallized by use of N,N,N′,N′-tetraethylbicyclo[2.2.2]oct-7-ene-2,3:5,6-dipyrrolidinium ion, called TEBOP in this study, had the same analog as SSZ-16 having Si/Al around six and a smaller particle size than SSZ-16. The AFX demonstrated a high performance for NH3-SCR as the zeolitic support to load a large number of divalent Cu ionic species with high hydrothermal stability.

scholarly journals Organic Structure-Directing Agent-Free Synthesis of Mordenite-Type Zeolites Driven by Al-Rich Amorphous Aluminosilicates

ACS Omega ◽  
2021 ◽  
Author(s):  
Ting Xiao ◽  
Mizuho Yabushita ◽  
Toshiki Nishitoba ◽  
Ryota Osuga ◽  
Motohiro Yoshida ◽  
...  
Keyword(s):  
Structure Directing Agent ◽  
Organic Structure

A powerful structure-directing agent for the synthesis of nanosized Al- and high-silica zeolite Beta in alkaline medium

2011 ◽  
Vol 142 (1) ◽  
pp. 17-25 ◽  
Author(s):  
Olivier Larlus ◽  
Svetlana Mintova ◽  
Stephen T. Wilson ◽  
Richard R. Willis ◽  
Hayim Abrevaya ◽  
...  
Keyword(s):  
Alkaline Medium ◽  
Zeolite Beta ◽  
Structure Directing Agent ◽  
High Silica

Influence of Organic Structure Directing Agent Isomer Distribution on the Synthesis of SSZ-39

2015 ◽  
Vol 27 (7) ◽  
pp. 2695-2702 ◽  
Author(s):  
Michiel Dusselier ◽  
Joel E. Schmidt ◽  
Roger Moulton ◽  
Barry Haymore ◽  
Mark Hellums ◽  
...  
Keyword(s):  
Structure Directing Agent ◽  
Organic Structure ◽  
Isomer Distribution

scholarly journals Revisiting the seed-assisted synthesis of zeolites without organic structure-directing agents: insights from the CHA case

RSC Advances ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 5304-5315 ◽  
Author(s):  
Grandprix T. M. Kadja ◽  
Iftitah R. Kadir ◽  
Adroit T. N. Fajar ◽  
Veinardi Suendo ◽  
Rino R. Mukti
Keyword(s):  
Crystallization Behaviour ◽  
Structure Directing Agent ◽  
Organic Structure ◽  
Structure Directing Agents

Herein, the crystallization behaviour of the CHA zeolite synthesized via the seed-assisted method and in the absence of an organic structure-directing agent has been revisited.

Direct synthesis of three-dimensional MWW zeolite with cyclohexylamine as an organic structure-directing agent

2018 ◽  
Vol 6 (26) ◽  
pp. 12244-12249 ◽  
Author(s):  
Weifeng Chu ◽  
Xiujie Li ◽  
Shenglin Liu ◽  
Xiangxue Zhu ◽  
Sujuan Xie ◽  
...  
Keyword(s):  
Direct Synthesis ◽  
Three Dimensional ◽  
Cost Effective ◽  
Hydrothermal Conditions ◽  
Structure Directing Agent ◽  
Organic Structure ◽  
Low Toxicity ◽  
Mww Zeolite

MCM-49 zeolite with a three-dimensional MWW framework was directly synthesized using low-toxicity and cost-effective cyclohexylamine (CHA) as an organic structure-directing agent under hydrothermal conditions.

Synthesis of (Silico)aluminophosphate Molecular Sieves Using an Alkanolamine as a Novel Organic Structure-directing Agent

2015 ◽  
Vol 44 (10) ◽  
pp. 1300-1302
Author(s):  
Xiying Li ◽  
Watcharop Chaikittisilp ◽  
Zhendong Liu ◽  
Yutaka Yanaba ◽  
Takeshi Yoshikawa ◽  
...  
Keyword(s):  
Molecular Sieves ◽  
Structure Directing Agent ◽  
Organic Structure ◽  
Aluminophosphate Molecular Sieves
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