1. A one-step conversion of benzene to phenol with a palladium membrane.

    Science 295(5552):105 (2002) PMID 11778042

    Existing phenol production processes tend to be energy-consuming and produce unwanted by-products. We report an efficient process using a shell-and-tube reactor, in which a gaseous mixture of benzene and oxygen is fed into a porous alumina tube coated with a palladium thin layer and hydrogen is ...
  2. A one-step conversion of benzene to phenol with a palladium membrane.

    Science 295(5552):105 (2002) PMID 11778042

    Existing phenol production processes tend to be energy-consuming and produce unwanted by-products. We report an efficient process using a shell-and-tube reactor, in which a gaseous mixture of benzene and oxygen is fed into a porous alumina tube coated with a palladium thin layer and hydrogen is ...
  3. Methanol decomposition over palladium supported mesoporous CeO2–ZrO2mixed oxides

    Microporous and Mesoporous Materials 44:565 (2001)

    Mesoporous CeO 2–ZrO 2 mixed oxides with high surface area and regular pore system were synthesized and their applications as an active support of palladium catalysts prepared by the deposition–precipitation (DP) method is investigated. The nanometer sized particle strongly inte...
  4. Methanol decomposition over palladium supported mesoporous CeO2–ZrO2mixed oxides

    Microporous and Mesoporous Materials 44:565 (2001)

    Mesoporous CeO 2–ZrO 2 mixed oxides with high surface area and regular pore system were synthesized and their applications as an active support of palladium catalysts prepared by the deposition–precipitation (DP) method is investigated. The nanometer sized particle strongly inte...
  5. Synthesis of mesoporous hexagonal titanium aluminophosphate molecular sieves and their catalytic applications

    Applied Catalysis A: General 203(2):311 (2000)

    The synthesis of stable titanium containing hexagonal mesoporous aluminophosphate (TAP) molecular sieves obtained by hydrothermal crystallization using the fluoride route is described. Catalysts were well characterized using XRD, FTIR, DRS-UV, solid-state NMR, SEM, TEM, ICP and sorption stu...
  6. Epoxidation over niobium and titanium grafted MCM-41 and MCM-48 mesoporous molecular sieves.

    Studies in Surface Science and Catalysis 129:327 (2000)

    Highly dispersed niobium or titanium containing molecular sieve catalysts were prepared by post synthesis modification of anchoring at surface silanol groups, using direct grafting of niobium and titanium compounds onto the totally accessible inner and outer surface of siliceous MCM-41...
  7. Synthesis of mesoporous hexagonal titanium aluminophosphate molecular sieves and their catalytic applications

    Applied Catalysis A: General 203(2):311 (2000)

    The synthesis of stable titanium containing hexagonal mesoporous aluminophosphate (TAP) molecular sieves obtained by hydrothermal crystallization using the fluoride route is described. Catalysts were well characterized using XRD, FTIR, DRS-UV, solid-state NMR, SEM, TEM, ICP and sorption stu...
  8. Epoxidation over niobium and titanium grafted MCM-41 and MCM-48 mesoporous molecular sieves.

    Studies in Surface Science and Catalysis 129:327 (2000)

    Highly dispersed niobium or titanium containing molecular sieve catalysts were prepared by post synthesis modification of anchoring at surface silanol groups, using direct grafting of niobium and titanium compounds onto the totally accessible inner and outer surface of siliceous MCM-41...
  9. Critical nuclei size effect in the densification of nanostructured niobia ceramics

    Materials Research Bulletin 34(2):225 (1999)

    An effective technique for obtaining near-theoretical density niobium oxide by utilizing the critical nuclei size effect is reported. Dense nanostructured niobium oxide with more than 99% of the theoretical maximum and an average grain size of less than 90 nm was produced by sintering durin...
  10. Critical nuclei size effect in the densification of nanostructured niobia ceramics

    Materials Research Bulletin 34(2):225 (1999)

    An effective technique for obtaining near-theoretical density niobium oxide by utilizing the critical nuclei size effect is reported. Dense nanostructured niobium oxide with more than 99% of the theoretical maximum and an average grain size of less than 90 nm was produced by sintering durin...
  11. Selective catalytic reduction of NO under ambient conditions using ammonia as reducing agent and MFI zeolites as catalysts

    Applied Catalysis B: Environmental 10(4):L237 (1996)

    Ambient temperature SCR of NO was studied over Ti, V and B silicalite-1, silicalite-1 and H-ZSM-5 catalysts. It was observed that even at 0°C silicalite-1 possesses some activity which falls off sharply with increasing temperature. An enhanced activity could be correlated to the titanium co...
  12. Selective catalytic reduction of NO under ambient conditions using ammonia as reducing agent and MFI zeolites as catalysts

    Applied Catalysis B: Environmental 10(4):L237 (1996)

    Ambient temperature SCR of NO was studied over Ti, V and B silicalite-1, silicalite-1 and H-ZSM-5 catalysts. It was observed that even at 0°C silicalite-1 possesses some activity which falls off sharply with increasing temperature. An enhanced activity could be correlated to the titanium co...
  13. Convenient synthesis of crystalline microporous transition metal silicates using complexing agents

    Studies in Surface Science and Catalysis 84:109 (1994)

    A general convenient method is described for the hydrothermal synthesis of transition metal silicate molecular sieves using complexing agent. This method is particularly useful for the incorporation of those metal ions which form insoluble hydroxides/oxides, such as iron, titanium, zir...
  14. Convenient synthesis of crystalline microporous transition metal silicates using complexing agents

    Studies in Surface Science and Catalysis 84:109 (1994)

    A general convenient method is described for the hydrothermal synthesis of transition metal silicate molecular sieves using complexing agent. This method is particularly useful for the incorporation of those metal ions which form insoluble hydroxides/oxides, such as iron, titanium, zir...
  15. CATALYTIC PROPERTIES OF [Al]-, [Ga]- AND [Fe]-SILICATE ANALOGS OF ZSM-11 IN C7 AND C8 AROMATIC HYDROCARBON REACTIONS: INFLUENCE OF ISOMORPHOUS SUBSTITUTION

    A comparison of the catalytic properties of [Al]-, [Ga]- and [Fe]-silicate analogs of MEL (ZSM-11), at similar conversion levels and at same temperature and feed ratio in the methylation of toluene, methylation and isomerization of m-xylene and disproportionate of ethylbenzene revealed t...
  16. SYNTHESIS AND CHARACTERISATION OF A NEW HIGH-SILICA, LARGE-PORE ALUMINOSILICATE ZEOLITE, NCL-1

    A new, high-silica (Si/Al = 20 to infinity) large pore zeolite, NCL-1 as well as its Al-free silica polymorph have been synthesised and characterised by XRD, electron microscopy, thermal analysis, framework IR and solid state MAS NMR spectroscopies, adsorption and catalytic methods. Prel...
  17. Selective formation of 1,2,4 isomer among trimethyl benzenes in the methylation of xylenes over Al-, Ga-, and Fe-silicates with MEL structure

    Journal of Catalysis 138(2):518 (1992)

    The methylation of m-xylene with methanol over Al-, Ga-, and Fe-silicate analogs of ZSM-11 (MEL topology) resulted in very high selectivities for the 1,2,4 isomer (98.5 ± 1%) among trimethylbenzenes (TMBs) at about 50–80 wt% TMB yield. The methanol selectivity for alkylation reaction...
  18. Selective formation of 1,2,4 isomer among trimethyl benzenes in the methylation of xylenes over Al-, Ga-, and Fe-silicates with MEL structure

    Journal of Catalysis 138(2):518 (1992)

    The methylation of m-xylene with methanol over Al-, Ga-, and Fe-silicate analogs of ZSM-11 (MEL topology) resulted in very high selectivities for the 1,2,4 isomer (98.5 ± 1%) among trimethylbenzenes (TMBs) at about 50–80 wt% TMB yield. The methanol selectivity for alkylation reaction...