Vietnam Journal of Catalysis and Adsorption

RESEARCH PAPER

open access logo 200x200Influence of organic structure directing agents on the formation of SAPOs structure

Doan Anh Tuan1, Nguyen Ngoc Khang1, Dam Le Quoc Phong1, Vuong Thanh Huyen1,2, Le Minh Thang1, Pham Thanh Huyen1,This email address is being protected from spambots. You need JavaScript enabled to view it.

1School of Chemical Engineering, Hanoi University of Science and Technology, Vietnam
2Leibniz Institute for Catalysis, University of Rostock, Germany

ABSTRACT

Silicoaluminophotphate (SAPO) are potential eco-friendly catalysts for the selective catalytic reduction (SCR) of NOx by NH3 at low-temperature. This study investigated the effects of organic structure directing agents on the formation of SAPOs structure. Different organic structure directing agents namely, triethylamine (TEA), tetramethylammonium hydroxide (TMAOH) and morpholine were chosen for the synthesis. Obtained SAPOs were characterized by XRD, FE-SEM, BET and EPR methods.
The results showed that the template TEA was preferable to synthesize SAPO-5 molecular sieve, whereas morpholine was the most suitable template for SAPO-34. TMAOH and a combination of organic templates (TMAOH and TEA) led to the formation of SAPO-11 and SAPO-37, respectively.

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