Characterization of surface acidity and catalytic ability of natural clay minerals by means of test catalytic reaction

Title:

Characterization of surface acidity and catalytic ability of natural clay minerals by means of test catalytic reaction

Creator:

Novikova, Lyudmila, Belchinskaya, Larisa, Roessner, Frank, and Alsawalha, Murad

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:47093597-a38b-4b24-b550-3465d991d237
uuid:47093597-a38b-4b24-b550-3465d991d237
doi:10.13168/AGG.2013.0048
issn:1214-9705

Subject:

Geologie. Meteorologie. Klimatologie, jílové minerály, clay minerals, test catalytic reaction, methylbutynol conversion, surface acidity, 7, and 551

Type:

article, články, model:article, and TEXT

Format:

print, bez média, and svazek

Description:

Catalytic test reaction of methylbutynol (MBOH) conversion was applied to investigation of natural clays and non-clay minerals from Jordanian (bentonite, kaolinite, diatomite, zeolit e) and Russian (palygorskite, kaolinite, hydromica) deposits as well as H-ZSM-5. Palygorskite and kaolinite containing samples have shown the highest catalytic activity. Conversionove r Jordanian clay minerals decreased in the order: zeolite > bentonite > red kaolinite > white kaolinite > diatomite that agreed to change of acidity, surface area of samples. Sufficient deactivation was observed for H-ZSM-5, kaolinite and hydromica due to adsorption of secondary product in micropores of raw minerals. Products of both acidic and basic pathways of test reaction were formed indicating the presence of acid and basic sites on clays surface, apart from acidic catalyst H-ZSM-5. Theyield ratio of acidic to basic products was above the unity for zeolite, bentonite, red kaolinite, and palygorskite; equal to unity for diatomite and hydromica, and less then unity for white kaolinite. It was observed for kaolinite containing sample that high activation temperature increased conversion of MBOH owing to fo rmation of additional basic sites as a result of mineral dehydroxylation. Rise of montmorillonite content from 30 to 80 % provided 91-97 % of MBOH conversion., Lyudmila Novikova, Larisa Belchinskaya, Frank Roessner and Murad Alsawalha., and Obsahuje bibliografické odkazy

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Acta geodynamica et geomaterialia : | 2013 Volume:10 | Number:4 (172)

Harvested from:

CDK

Metadata only:

false