Characterization zeolite membranes

The present review of zeolite membrane technology covers synthesis and characterization methods as well as the theoretical aspects of transport and separation mechanisms. Special attention is focused on the performance of zeolite membranes in a variety of applications including liquid-liquid, gas/vapor and reactive... 

Tsuru, T., Takata, Y., Kondo, H., Hirano, F., Yoshioka, T., and Asaeda, M. (2003) Characterization of sol-gel derived membranes and zeolite membranes by nanopermporometry. Separ. Purif. Technol., 32, 23-27. 

In recent years, extensive work has been reported on the synthesis, characterization and applications of zeoUte membranes [5]. ZeoUte membranes are capable of overcoming some of the challenges facing polymer membranes. Under conditions where polymer membranes cannot be used zeolite membranes have the potential... 

In this paper, we consider a zeolite membrane comprised of a single zeolite crystal. While real zeolite membranes are polycrystalline, this approximation is useful because many experimental studies aim to characterize transport that occurs purely through zeolite pores [6], The steady state flux, J, through this membrane is... 

This is the area of zeolitic materials, which can be characterized as crystalline, porous materials built predominantly of oxygen, silica, and alumina (or phosphor) [1,2]. These crystals contain straight or sinusoidal channels that can be interconnected, resulting in a one-, two-, or three-dimensional pore network. At the intersections, small or large cavities may exist. Due to the crystallinity, the pores are uniform and can be prepared with great reproducibility, which is the biggest advantage over attempts to produce amorphous membranes with pores of molecular dimensions. Therefore, in the last decade much research effort has been put into the development of zeolitic membranes, and with success [3-29]. 

Zeolite Membranes Synthesis, Characterization, Important Applications, and Recent Advances... 

Bernal MP, Coronas J, Menendez M, and Santamaria J. Characterization of zeolite membranes by measurement of permeation fluxes in the presence of adsorbable species. Ind Eng Chem Res 2004 41 5071-5078. 

Giroir-Fendler A, Julbe A, Ramsay JDF, and Dalmon JA. CNRS French Patent, PCT Int Appl. FR 94-5562, 940429. 1994. Giroir-Fendler A, Peureux J, Mozzanega H, and Dalmon JA. Characterization of a zeolite membrane for catalytic membrane reactor application. Stud Surf Sci Catal A 1996 101 127-136. 

Xiongfu Z, Yonsheng L, Jinqu W, Huairong T, and Changhou L. Synthesis and characterization of Fe-MFI zeolite membrane on a... 

S. Xiang and Y.H. Ma, Formation and characterization of zeolite membranes from sols. Paper presented at the 3rd International Coivference on Inorganic Membranes, July 10-14,1994, Worcester, MA, USA. 

Arrueb M, MaUada R, and Pina MP, Zeolite membranes Synthesis, characterization, important applications, and recent advances. In Pabby AK, Sastre AM, and Rizvi SSH, eds. Handbook oj Membrane Separations Chemical, Pharmaceutical, and Biotechnological Applications CRC, 2008 pp. 269—324. 

The objective of this review article is to provide students and young researchers in the field, with a general but relatively short overview of the current state of the art in zeolite membranes. It will cover zeolite membrane preparation, characterization and main applications, while referring to the recent literature. For more detailed reviews, the lecturer will refer to a... 

MTBE synthesis from /-butanol and methanol in a membrane reactor has been reported by Salomon et al. [2.453]. Hydrophilic zeolite membranes (mordenite or NaA) were employed to selectively remove water from the reaction atmosphere during the gas-phase synthesis of MTBE. This reaction was carried out over a bed of Amberlyst 15 catalyst packed in the inside of a zeolite tubular membrane. Prior to reaction, the zeolite membranes were characterized by measuring their performance in the separation of the equilibrium mixture containing water, methanol, /-butanol, MTBE, and isobutene. The results obtained with zeolite membrane reactors were compared with those of a fixed-bed reactor (FBR) under the same operating conditions. MTBE yields obtained with the PBMR at 334 K reached 67.6 %, under conditions, where the equilibrium value without product removal (FBR) would be 60.9%. 

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