- Email: [email protected]
18-P-10 - Adsorption of CO2, SO2 and NH3 on zeolitic materials synthesized from fly ash
227
18-P-09 - Preparation of Na-A zeolite capillary columns by in-situ synthesis D. Kou, Z. Li, J. Wu, Ming Liu and S. Xiang*
Department of chemistry, Nan Kai University, Tianjin, P.R. China- [email protected] The traditional zeolite PLOT column has lots of shortcomings, which considerably restrict the further development of zeolite in practical utilization. In this paper, a new kind of NaA zeolite GC column has been prepared and characterized by in-situ synthesis technique. The form process and mechanism in capillary column have also been discussed. On the basis, gas-solid and gas-liquid capillary columns have been prepared, which both show good separation of various organic compounds and extensively broaden the range of the utilization of zeolite in GC. Furthermore, the zeolite large bore column has also been prepared and the test result is very good. Consequently, the possibility to replace packed column in a great deal of regular analysis has been pursued.
18-P-10 - Adsorption of CO2, SO2 and NH3 on zeolitic materials synthesized from fly ash S. Hernfindez (a), R.Juan (a), X. Querol (b), N. Moreno (b), P. Ferrer (a) and J.M. Andr6s (a). a Instituto de Carboquimica (CSIC), [email protected], Spain. b Instituto de Ciencias de la Tierra ((Jaume Almera))(CSIC), [email protected]'a.csic.es, Spain Zeolites synthesized from fly ash were selected for determining the adsorption capacity of CO2, SO2 and NH3 and the surface area. The results showed a low retention capacities for Sodalite, Analcime, NAP1, F Linde and KM (3.2-9.3 mg CO2/g, 1.1-3.9 mg SO2/g and 0.5-4.8 mg NH3/g) that could be explained for the low Sco2 measured in the working conditions (2347 m2/g). High retention capacities were found for Herschelite and Zeolite A by the same technique (30.3-73.5 mg CO2/g, 9.3-21.7 mg SO2/g and 8:1-110.7 mg NH3/g). The results suggest a certain relationship between surface area and adsorption capacities.
18-P-II structure
Dibenzothiophene
adsorption
over
zeolites
with
faujasite
J.L. Sotelo, M.A. Uguina, M.D. Romero, J.M. G6mez, V.I. Agueda and M.A. Ortiz.
Chemical Engineering Department. Faculty of Chemistry. Complutense University of Madrid, Madrid, Spain. [email protected], ucm. es Adsorption of dibenzothiophene (DBT) over FAU zeolites exchanged with alkali cations has been studied. Cristallinity (by XRD and IR), exchange level (XRF) and basic properties (CO2 TPD) of different adsorbents used have been determined. The influence of Si/A1 molar ratio and type of cation exchanged in the zeolite as well as the presence of toluene in feedstock mixture on DBT adsorption capacity and selectivity of adsorbent has been also determined. Thermogravimetric analysis showed a stronger DBT adsorption over X zeolites.
18-P-09 - Preparation of Na-A zeolite capillary columns by in-situ synthesis D. Kou, Z. Li, J. Wu, Ming Liu and S. Xiang*
Department of chemistry, Nan Kai University, Tianjin, P.R. China- [email protected] The traditional zeolite PLOT column has lots of shortcomings, which considerably restrict the further development of zeolite in practical utilization. In this paper, a new kind of NaA zeolite GC column has been prepared and characterized by in-situ synthesis technique. The form process and mechanism in capillary column have also been discussed. On the basis, gas-solid and gas-liquid capillary columns have been prepared, which both show good separation of various organic compounds and extensively broaden the range of the utilization of zeolite in GC. Furthermore, the zeolite large bore column has also been prepared and the test result is very good. Consequently, the possibility to replace packed column in a great deal of regular analysis has been pursued.
18-P-10 - Adsorption of CO2, SO2 and NH3 on zeolitic materials synthesized from fly ash S. Hernfindez (a), R.Juan (a), X. Querol (b), N. Moreno (b), P. Ferrer (a) and J.M. Andr6s (a). a Instituto de Carboquimica (CSIC), [email protected], Spain. b Instituto de Ciencias de la Tierra ((Jaume Almera))(CSIC), [email protected]'a.csic.es, Spain Zeolites synthesized from fly ash were selected for determining the adsorption capacity of CO2, SO2 and NH3 and the surface area. The results showed a low retention capacities for Sodalite, Analcime, NAP1, F Linde and KM (3.2-9.3 mg CO2/g, 1.1-3.9 mg SO2/g and 0.5-4.8 mg NH3/g) that could be explained for the low Sco2 measured in the working conditions (2347 m2/g). High retention capacities were found for Herschelite and Zeolite A by the same technique (30.3-73.5 mg CO2/g, 9.3-21.7 mg SO2/g and 8:1-110.7 mg NH3/g). The results suggest a certain relationship between surface area and adsorption capacities.
18-P-II structure
Dibenzothiophene
adsorption
over
zeolites
with
faujasite
J.L. Sotelo, M.A. Uguina, M.D. Romero, J.M. G6mez, V.I. Agueda and M.A. Ortiz.
Chemical Engineering Department. Faculty of Chemistry. Complutense University of Madrid, Madrid, Spain. [email protected], ucm. es Adsorption of dibenzothiophene (DBT) over FAU zeolites exchanged with alkali cations has been studied. Cristallinity (by XRD and IR), exchange level (XRF) and basic properties (CO2 TPD) of different adsorbents used have been determined. The influence of Si/A1 molar ratio and type of cation exchanged in the zeolite as well as the presence of toluene in feedstock mixture on DBT adsorption capacity and selectivity of adsorbent has been also determined. Thermogravimetric analysis showed a stronger DBT adsorption over X zeolites.