Reversible deactivation of γ-alumina by steam in the gas-phase dehydration of methanol to dimethyl ether

Abstract

Reversible deactivation of γ-alumina by steam in the gas-phase dehydration of methanol to dimethyl ether.

Sorption enhanced dimethyl ether synthesis under industrially relevant conditions: experimental validation of pressure swing regeneration

“…The experimental procedure for the γ-alumina catalyst testing can be found in previous work. 27 A combination of commercially obtained CZA catalyst, γ-Al 2 O 3 catalyst and zeolite 3A adsorbent were used for the experimental demonstration of direct DME synthesis from CO/CO 2 /H 2 -mixtures.…”

“…Reaction kinetics have been determined for the used catalyst materials by fitting the parameters in the models of Graaf et al (1988) and Berčič et al (1992) for the methanol synthesis and methanol dehydration respectively, shown in Table 2. 5,27,30,31 The steam adsorption isotherm of the LTA zeolite adsorbent is determined under the high pressure and temperature working conditions of the SEDMES process. A Sips isotherm best describes the experimental data, in accordance with the available literature at lower temperature and pressure conditions.…”

“…Sorption enhanced DME synthesis is a promising process intensification strategy for the direct production of DME from CO 2 . 7,8,24,[26][27][28] While enabling increased single-pass conversion and selectivity, experimental studies have indicated that time and energy intensive temperature swing regeneration would be required for adsorbent regeneration. 8,26 Pressure swing regeneration is faster and more energy efficient as indicated in a previous SEDMES modelling study 26 and highlighted in our most recent communication.…”

Steam adsorption on molecular sieve 3A for sorption enhanced reaction processes

“…Even so, the production and efficient handling of steam remains a major bottleneck for industrial CO 2 utilization (Centi and Perathoner 2009; Accelerating Breakthrough Innovation in Carbon Capture 2017; Katelhon et al 2019). In this context, several groups have experimentally demonstrated the benefit of sorption enhancement in terms of product yield that exceeds the thermodynamic equilibrium in absence of steam adsorption (van Kampen et al ,2020aKim et al 2001;Carvill et al 1996;Borgschulte et al 2013;Ressler et al 2006;Choi et al 2002;Boon et al 2019;Liuzzi et al 2020). In parallel, modelling studies on sorption enhanced reactions have sought to conceptually understand sorption enhancement and focus on process design (van Kampen et al 2020b;Iliuta et al 2011;Parra et al 2017Parra et al ,2018Bayat et al 2016;Guffanti et al 2021).…”

Experimental validation of pressure swing regeneration for faster cycling in sorption enhanced dimethyl ether synthesis

“…9,10 Sorption enhanced DME synthesis (SEDMES), which combines direct DME synthesis with in situ water removal using a solid adsorbent, is a promising process intensification for the direct production of DME from CO 2 . 7,[11][12][13] While enabling increased single-pass conversion and selectivity, experimental studies have indicated that time and energy intensive temperature swing regeneration would be required for adsorbent regeneration. 7,13 A potentially faster and more energy efficient approach is pressure swing regeneration as recently indicated in a SEDMES modelling study.…”