A novel cascade membrane reactor concept for methanol synthesis in the presence of long-term catalyst deactivation

Abstract

SUMMARYIn this study, a dynamic model for a novel cascade membrane methanol reactor (CMMR) in the presence of long term catalyst deactivation was developed. In the first catalyst bed the synthesis gas partially convert to methanol. In the second reactor the reaction heat is used to preheat the feed gas to the first bed. The wall of the tubes in the both of reactors is covered with a palladium-silver membrane. The simulation results represent 4.7% and 3.92% enhancement in the yield of methanol production during 1400 days of operation in the CMMR in comparison with conventional dual type methanol reactor (CDMR) and membrane dual type methanol reactor (MDMR), respectively and a favorable profile of temperature and activity along the CMMR relative to MDMR and CDMR.

Methane oxidation with low O2/CH4 ratios in the present of water: Combustion or reforming

“…The reaction mechanism, reaction intermediates, and structures of metal clusters have been studied by DFT, Raman spectroscopy, DRIFTS, HRTEM, etc. [7,11]. Oxidation and reforming reactions have both been reported on these noble metal catalysts, and a high reactivity is achieved at a low temperature.…”

Production of hydrogen and methanol enhancement via a novel optimized thermally coupled two-membrane reactor

“…Rezaie et al compared the results of heterogeneous and homogeneous models in a dynamic simulation for fixed-bed methanol synthesis and reported similar results [13]. The importance of methanol has motivated numerous studies whose aim was to improve the efficiency of the industrial methanol synthesis reactor [14][15][16][17].…”

A novel water perm-selective membrane dual-type reactor concept for Fischer–Tropsch synthesis of GTL (gas to liquid) technology

“…These properties cause Pd-based membranes such as PdeAg membranes to be attractive to apply in petrochemical gases. The extensive literature survey of the PdeAg membrane can be found in previous work [42].…”