Swelling of MCM-56 and MCM-22P with a new medium - surfactant-tetramethylammonium hydroxide mixtures

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F13%3A00422067" target="_blank" >RIV/61388955:_____/13:00422067 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.cattod.2012.07.040" target="_blank" >http://dx.doi.org/10.1016/j.cattod.2012.07.040</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.cattod.2012.07.040" target="_blank" >10.1016/j.cattod.2012.07.040</a>

Result language
angličtina
Original language name
Swelling of MCM-56 and MCM-22P with a new medium - surfactant-tetramethylammonium hydroxide mixtures
Original language description
Two different types of layered MWW zeolite, i.e., delaminated MCM-56 and multilayer MCM-22P, have been studied for swelling using a new surfactant/tetraalkylammonium combination as the swelling reagent. The commonly used in the past tetrapropylammonium hydroxide (TPA-OH) was replaced by its tetramethylammonium (TMA-OH) homologue. The latter was previously considered unsuitable for use in swelling of MCM-22P. The extent of swelling with different amounts of TMA-OH accompanying surfactant was determined first by X-ray diffraction. Selected samples were pillared with silica and evaluated quantitatively by nitrogen sorption at 77 K and FTIR. The swelling of MCM-56, which is reported in detail for the first time, has been found to be more facile and extensive compared to the multi-layer MCM-22P, consistent with its delaminated nature. BET surface areas of pillared MCM-56 samples increase with the amount of hydroxide used for swelling and approach 700 m(2)/g. Pillared MCM-22P show similar tr
Czech name
—
Czech description
—

Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CF - Physical chemistry and theoretical chemistry
OECD FORD branch
—

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)