Reaction of Ethanol and Ammonia to Pyridine over ZSM-5-Type Zeolites

Gaag, F.J. van der; Louter, F.; Bekkum, H. van

doi:10.1016/s0167-2991(09)60945-9

Cited by 8 publications

(3 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, sponge shape provides more mechanical strength to the membrane. hydrophobic property [1,2,17] while ZSM -5 was quite hydrophilic due to its low Si/Al ratio [32]. Compare to the other researches, the ratio of Si/Al that improved the hydrophobic was about 300 which was almost ten times higher than ZSM -5 used in this study [25,26].…”

Section: Structure Morphology and Hydrophobicity Of The Prepared Memb...mentioning

confidence: 58%

“…The particle size of OPAS (548 ± 120 nm) was slightly larger than ONPS (508 ± 100 nm). The pore size of OAPS and ONPS was reported to be around 1 -3 nm [27,31] while the pore size of ZSM -5 was about 0.54 -0.55 nm [32].…”

Section: Tuning Operating Conditionmentioning

confidence: 99%

“…The addition of ZSM -5 into the PDMS selective, however, reduced the hydrophobicity of the composite membrane. The electric charge of Aland Na + caused the ZSM -5 became more polarity and could interact well with water that promote water transport through the membrane [32]. The incorporated ONPS and OAPS affected the contact angle in the different way.…”

Section: Structure Morphology and Hydrophobicity Of The Prepared Memb...mentioning

confidence: 99%

See 2 more Smart Citations

Comparison Of Zsm - 5 And Poss Nanocomposite Pervaporation Membranes For Furfural/Water Separation

Sawatdiruk

View full text Add to dashboard Cite

The recovery of furfural via a conventional separation technology like distillation and solvent extraction requires very large energy consumption and high amount of chemical solvent. Thus, there is a need for an alternative separation process that is economic and more energy friendly for the furfural recovery. Pervaporation is a well - recognized energy friendly and effective separation tool. If there is suitable pervaporation membrane with efficient separation performance, the pervaporation can be a promising replacement for the conventional separation method. Therefore, this thesis aims to develop a suitable membrane for furfural recovery via pervaporation process. In this work, the polydimethylsiloxane (PDMS) selective membranes with the addition of zeolite?socony?mobil?? 5 (ZSM ? 5),?octanitropheyl?(ONPS) and?octaaminophenyl?(OAPS) at various concentration (5 ? 20 wt%) were prepared. The result showed that membrane prepared with OAPS showed the best separation factor compared to membrane incorporated with other fillers. The low polarity of OAPS improved the interaction between the filler and furfural. The increase amount of OAPS filler loading could enrich the separation factor because the extra OAPS not only increased the furfural pathway but also decreased the water diffusion rate. The PDMS membrane with 15 wt% of OAPS could purify furfural from 3 wt% to 20 wt% furfural concentration. The increase of feed temperature would improve the total flux of membrane because the partial vapor pressure was increased. The separation factor was increased at the temperature ranged 30 ? 50 ?C then dropped at 60?C. While at feed temperature 60?C, the effect of free volume would have more impact over the increased of partial vapor pressure so the separation reduced.?

show abstract

Section: Structure Morphology and Hydrophobicity Of The Prepared Memb...mentioning

confidence: 58%

Section: Tuning Operating Conditionmentioning

confidence: 99%

Section: Structure Morphology and Hydrophobicity Of The Prepared Memb...mentioning

confidence: 99%

See 1 more Smart Citation

Comparison Of Zsm - 5 And Poss Nanocomposite Pervaporation Membranes For Furfural/Water Separation

Sawatdiruk

View full text Add to dashboard Cite

show abstract

The use of zeolites in organic reactions

Bekkum

Kouwenhoven

1989

Recl. Trav. Chim. Pays‐Bas

Self Cite

View full text Add to dashboard Cite

Abstract. The use of zeolites as selective catalysts and adsorbents in organic syntheses is a field of growing importance. A brief discussion of the structure, modification and catalytic properties of zeolites relevant to the topic is presented. Some non-and semi-catalytic applications of zeolites in fine-chemical preparation are mentioned and examples are given of zeolite catalysis in oil refining and petrochemicals production. Further examples of the use of zeolites as catalysts in organic reactions are chosen from the fields of isomerization, aromatic substitution, oxidation, cyclization and heterocyclic ring formation.

show abstract

The reaction of ammonia and ethanol or related compounds towards pyridines over high‐silica zeolites with medium pore size

FEBRE

Hoefnagel

Bekkum

1996

Recl. Trav. Chim. Pays‐Bas

View full text Add to dashboard Cite

Abstract. Pyridine bases were formed by the reaction of ethanol and ammonia over zeolite Nu-10 in the presence of oxygen, which was shown to play an essential role. The use of different proton-introduction procedures resulted in different activities and selectivities of the catalyst. H-Nu-10 and H-ZSMJ showed substantially higher pyridine selectivity than H-mordenite. In order to clarify the reaction mechanism of the title reaction, several other small amines and oxygenates were tested in the presence/absence of oxygen with respect to their selectivity towards pyridines. Zeolitic acid sites were shown to catalyse the dehydrogenation of ethanol, together with condensation, cyclization and aromatization, while structural defects probably produced oxidation products such as acetaldehyde and formaldehyde which are thought to play an important role in the reaction. The use of methylamine instead of ammonia greatly enhanced the pyridine selectivity.Introduction *

show abstract

Reaction of Ethanol and Ammonia to Pyridine over ZSM-5-Type Zeolites

Cited by 8 publications

References 8 publications

Comparison Of Zsm - 5 And Poss Nanocomposite Pervaporation Membranes For Furfural/Water Separation

Comparison Of Zsm - 5 And Poss Nanocomposite Pervaporation Membranes For Furfural/Water Separation

The use of zeolites in organic reactions

The reaction of ammonia and ethanol or related compounds towards pyridines over high‐silica zeolites with medium pore size

Contact Info

Product

Resources

About