Dual-membrane reactor

Godini, H.R., Xiao, S., Kim, M., Gorke, O., Song, S., and Wozny, G. (2013) Dual-membrane reactor for methane oxidative coupling and dry methane reforming reactor integration and process intensification. Chem. Eng. Process. Process Intensif., 74, 153-164. 

Similarly, enantiomerically pure hydrophobic (S)-l-phenyl-2-propanol, (S)-4-phe-nyl-2-butanol, and (S)-6-methylhept-5-en-2-ol (sulcatol) were obtained with high purities in a dual-loop enzyme membrane reactor unit with separate membrane extraction unit (Kruse, 1996). Whereas substrate concentrations were low at 9-12 mM, space-time yields higher than 100 g (L d) 1 as well as concentrated product solutions were obtained. 

Zaspalis and Burggraaf [47] have summarized typical membrane reactor configurations, different membrane/ catalyst combinations, and a large number of membrane reactor studies. Their article clearly shows that inorganic membranes prepared by the sol-gel method, with their dual ability in catalysis and separation, have many unique advantages over other product forms. At the same time, it is important to realize that the parameters which affect a membrane s characteristics and the advantages which the sol-gel process offers are similar to what has been presented thus far. 

Like zeolites that combine shape selectivity with catalysis (Chapter 6), membranes combine separation with catalysis to enhance reaction rates. The dual functionality of zeolites derives from the nature of the catalytic material, whereas that of membranes derives from the nature of the reactor material. The catalyst in the membrane reactor can be a part of the membrane itself or be external to it (i.e., placed inside the membrane tube). The chief property of a membrane is its ability for selective permeation or permselectivity with respect to certain compounds. 

Wu Z, Wang B and Li K (2010), A novel dual-layer ceramic hollow fibre membrane reactor for methane conversion ,/ Membrane Sci, 352,63-70. 

Zhu X, Li Q, He Y, Cong Y and Yang W (2010), Oxygen permeation and partial oxidation of methane in dual-phase membrane reactors , J Membr Sci, 360, 454-460. 

Anderson, M., Lin, Y. S. (2013). Carbon dioxide separation and dry reforming of methane for synthesis of syngas by a dual-phase membrane reactor. AIChE Journal, 59(6), 2207—2218. 

Sa, S., Sousa, J. M., Mendes, A. (2010). Methanol steam reforming in a dual-bed membrane reactor for producing PEMFC grade hydrogen. Catalysis Today, 156, 254—260. 

Diuta I, Iliuta MC, Fongarland P, Larachi F. Integrated aqueous glycerol reforming to dimethyl ether synthesis—a novel allother-mal dual bed membrane reactor concept Chem. Eng. J. 2012b 187 311... 

Wu, Z., Wang, B. and Li, K. (2010). A novel Dual-Layer Ceramic Hollow Fibre Membrane Reactor for Methane Conversion, J. Membrane Sci., 352, pp. 63-70. 

O Neill, C. and Wolf, E.E. (2010) Partial oxidation of propane to acrolein in a dual bed inert membrane reactor. Catalysis Today, 156,124-131. 

Rahimpour, M.R., Rahmani, F. and Bayat, M. (2010) Contribution to emission reduction of CO2 by a fluidized-bed membrane dual-type reactor in methanol synthesis process. Chemical Engineering and Processing Process Intensification, 49, 589-598. 

In a zeolite membrane reactor the dual functions of reaction and separation are coupled in a single unit. Zeolite membrane reactors can be classified into two main groups ... 

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