scholarly journals Incorporation of Brazilian Diatomite in the Synthesis of An MFI Zeolite

Molecules ◽  
2019 ◽  
Vol 24 (10) ◽  
pp. 1980 ◽  
Author(s):  
Paloma Vinaches ◽  
Anderson Joel Schwanke ◽  
Christian Wittee Lopes ◽  
Iane M. S. Souza ◽  
Jhonny Villarroel-Rocha ◽  
...  

The need for greener procedures is a fact to reduce residues, to decrease industrial costs, and to accomplish the environmental agreements. In an attempt to address this question, we propose the addition of a natural resource, Brazilian diatomite, to an MFI zeolite traditional synthesis. We have characterized the resulting product with different techniques, such as X-ray diffraction, microscopy, and gas sorption, and, afterwards, we evaluate the greenness of the process by the Green Star method. The results were promising: We obtained the desired topology in the form of small crystallites aggregated and a pore diameter of 0.8 nm. In conclusion, the product has the necessary characteristics for an adsorption or catalytic future tests and escalation to industrial production.

2007 ◽  
Vol 76 (3) ◽  
Author(s):  
Yukio Takahashi ◽  
Yoshinori Nishino ◽  
Tetsuya Ishikawa

1988 ◽  
Vol 27 (Part 1, No. 7) ◽  
pp. 1331-1334 ◽  
Author(s):  
Takahiro Kojima ◽  
Toshiyuki Noguchi ◽  
Tomoya Ogawa

2005 ◽  
Vol 876 ◽  
Author(s):  
Patrick Huber ◽  
Klaus Knorr

AbstractWe present a selection of x-ray diffraction patterns of spherical (He, Ar), dumbbell- (N2, CO), and chain-like molecules (n-C9H20, n-C19H40) solidified in nanopores of silica glass (mean pore diameter 7nm). These patterns allow us to demonstrate how key principles governing crystallization have to be adapted in order to accomplish solidification in restricted geometries. 4He, Ar, and the spherical close packed phases of CO and N2 adjust to the pore geometry by introducing a sizeable amount of stacking faults. For the pore solidified, medium-length chainlike n-C19H40 we observe a close packed structure without lamellar ordering, whereas for the short-chain C9H20 the layering principle survives, albeit in a modified fashion compared to the bulk phase.


2019 ◽  
Vol 10 (1) ◽  
Author(s):  
S. J. Whiteley ◽  
F. J. Heremans ◽  
G. Wolfowicz ◽  
D. D. Awschalom ◽  
M. V. Holt

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