Methanol synthesis, membrane

Struis RPWJ, Quintilii M, and Stuck S. Feasibility of Li-Nafion hollow fiber membranes in methanol synthesis Mechanical and thermal stability at elevated temperature and pressure. J Membr Sci 2000 177(l-2) 215-223. 

Struis RPWJ and Stuck S. Verification of the membrane reactor concept for the methanol synthesis. Appl Catal A Gen 2001 216(1-2) 117-129. 

Technical tour to visit Research Institute of Innovation Technology for the Earth (RITE) was planned on one day morning during the period of the conference, and made a strong impression on the visitors. There are the first world demonstration plant for methanol synthesis from carbon dioxide and other related technologies such as membrane devices for separation of CO2 from the flue gas. The visitors could see also biochemical studies concerning CO2 fixation, and studies on total systems for CO2 mitigation. On the afternoon of the same day, they visited to Todai-ji temple located in the world famous ancient capital of... 

Struis and Stuck [6.12] have evaluated the application of membrane reactors for methanol synthesis using methanol permselective Nafion membranes. In their design calculations they utilize kinetic and membrane permeation data measured in their laboratory. They estimate that with 10 im thin membrane under methanol synthesis plant technically relevant conditions (T = 200 C, P = 40 bar, GHSV = 5000 h ), the single pass reactor yield improves by 40 %, and that the additional costs for the membrane materials correspond only to two production months. The ability of the Nafion membranes to withstand such conditions for prolonged periods still remains, however, questionable. 

GaUucci F, Basile A. A theoretical analysis of methanol synthesis from CO2 and in a ceramic membrane reactor. Int J Hydrogen Energy 2007 132 5050-5058. 

Verification of the Membrane Reactor Concept for the Methanol Synthesis. 

M. H. Khademi, M. R. Rahimpour and A. Jahanmiri, Differential evolution (DE) strategy for optimization of hydrogen production, cyclohexane dehydrogenation and methanol synthesis in a hydrogen-permselective membrane thermally coupled reactor, Int. J. Hydrogen Energy, 2010, 35, 1936-1950. 

Rahimpour MR, Bayat M, Rahmani F Dynamic simulation of a cascade fluidized-bed membrane reactor in the presence of long-term catalyst deactivation for methanol synthesis, Chem Eng Set 65 4239—4249, 2010. 

It yields an ideal feedstock with H2/CO ratio of 2 1 for methanol synthesis and the Fisher-Tropsch reaction to produce linear hydrocarbons. The use of dense ceramic MRs makes it possible to combine oxygen separation from air, partial oxidation, and reforming of methane in a single step, thus enabling significant reductions of capital investment in the gas-to-liquid industry [40]. Although perovskite membranes may exhibit catalytic activity in the POM reaction, a POM catalyst is usually applied to improve the methane conversion and CO selectivity. Figure 5.7... 

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. 

Franco, E.G., Neto, A., Linardi, M., and Arico, E., Synthesis of electrocalysts by the Bonnemann method for the oxidation of methanol and the mixture of H2/CO in a proton exchange membrane fuel cell, J. Braz. Chem. Soc., 13, 516, 2002. 

Bhattakarya, S. K., N. K.. Nag and N. D. Ganguly. 1971. Kinetics of vapor phase oxidation of methanol on reduced silver catalyst. J. Catai 23 158-167 Burggraaf, A. J. and K. Keizer. 1991. Synthesis of Inorganic Membranes. In Inorganic Membranes Synthesis Characteristics and Applications, Eds R. Bhave, van Nostrand Reinhold, New York (Chapter 2). 

The use of a mixed oxygen ion-electronic conductor membrane for oxygen separation with direct reforming of methane, followed by the use of a mixed protonic-electronic membrane conductor for hydrogen extraction has also been proposed in the literature [34]. The products are thus pure hydrogen and synthesis gas with reduced hydrogen content, the latter suitable, for example, in the Fish-er-Tropsch synthesis of methanol [34]. 

Fmoc-deprotection After the reaction is complete, wash the membrane three times with DMF for at least 30 s each. For storage, wash the modified membrane at least twice with methanol or ethanol and dry it in the air stream of a fume hood or using a hair dryer without heat. For resumption of synthesis after storage, treat the membrane once with DMF for 20 min (see Note 5). The Fmoc-deprotection is carried out by treatment of the membrane twice with 20% piperidine in DMF for at least 5 min each. 

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