This study investigated the equilibrium sorption capacities and
rates of sorption of some alcohols on Na- and/or H- form of
ZSM-35 at different temperatures by gravimetric method using
an electrobalance. The alcohols studied were methanol, ethanol, propan-1-ol, propan-2-ol, n-butanol.
The ZSM-35 sample used in sorption experiments resulted from
a study for synthesis of high silica ZSM-35 zeolite. This ZSM-35 sample was called as NaZSM-35. The influence of ion-exchange on the sorption capacity and kinetics was investigated by converting NaZSM-35 into H-form by the ion exchange method. In this method, a sufficient amount of ZSM-35 sample (200-250 mg) was mixed with 25 ml of 1 N NH4Cl solution for 24 hours at room temperature. This procedure was repeated until no Na+ was detected by a Flame Photometer. After the ion exchange was completed , the sample was washed with deionized water, filtered, dried and recalcined for the removal of the ammonia and this sample was denoted as HZSM-35.
The highest sorption capacity (cm3/g) was observed for
methanol on HZSM-35 / 0.1656 cm3/g and the lowest sorption
capacity was observed for propan-2-ol at NaZSM-35 / 0.003
cm3/g. Sorption of methanol and ethanol were very rapid. The
sorption capacities of other three alcohols / propan-1-ol,
propan-2-ol and n-butanol, were lower and they had slower
rates of sorption.
HZSM-35 had greater limiting sorption capacity than NaZSM-35 for propan-1-ol, propan-2-ol and n-butanol at all temperatures.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12608183/index.pdf |
| Date | 01 January 2007 |
| Creators | Babuccuoglu, Yurdaer |
| Contributors | Yucel, Hayrettin |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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