Synthesis of dimethyl ether from syngas using a hierarchically porous composite zeolite as the methanol dehydration catalyst

Simultaneous production of dimethyl ether (DME), methyl formate (MF) and hydrogen from methanol in an integrated thermally coupled membrane reactor

“…Besides, CO conversion to CO 2 and CO 2 emission is a major environmental problem. Hence, the direct method is not commercially suitable [13,14].…”

Coated HZSM‐5 catalyst with aluminophosphate for methanol dehydration to produce dimethyl ether reaction

“…Gamma‐alumina and HZSM‐5 do have some drawbacks such as promoting hydrocarbon formation and hydrothermal stability, which ultimately leads to catalyst deactivation. Although, some researchers are focused to modify and improve the catalyst properties to optimize DME production; aluminophosphate is reported as a promising catalyst for methanol dehydration reaction even though it possesses weakly acidic sites . In this study, a series of aluminophosphate catalysts with varying P/Al molar ratios were successfully synthesized using aluminum nitrate nona‐hydrate (ANN) with the addition of Al and P over HZSM‐5 material.…”

Ethanol as a Binder to Fabricate a Highly‐Efficient Capsule‐Structured CuO−ZnO−Al2O3@HZSM‐5 Catalyst for Direct Production of Dimethyl Ether from Syngas

“…[2][3][4][21][22][23][24][25][26][27][28][29][30] The hybrid catalysts prepared by physically mixing methanol synthesis catalyst (CuÀ ZnOÀ Al 2 O 3 ) and methanol dehydration catalyst (solid acid) were attempted to catalyze the STD process. [31][32][33][34][35][36][37][38][39][40] The methanol synthesis unit in the hybrid catalysts have been focused on tuning catalysts composition, [21][22][23][24][25] synthetic method, [26,27] preparation parameters of Cu-based catalysts [28,29] and alternatives to Cu-based. [30] The methanol dehydration unit in the hybrid catalysts has been focused on the modulation of particle size, [31] structure [32][33][34] and modification of acidic sites by metal [35][36][37][38] of zeolite and γ-Al 2 O 3 .…”

“…[31][32][33][34][35][36][37][38][39][40] The methanol synthesis unit in the hybrid catalysts have been focused on tuning catalysts composition, [21][22][23][24][25] synthetic method, [26,27] preparation parameters of Cu-based catalysts [28,29] and alternatives to Cu-based. [30] The methanol dehydration unit in the hybrid catalysts has been focused on the modulation of particle size, [31] structure [32][33][34] and modification of acidic sites by metal [35][36][37][38] of zeolite and γ-Al 2 O 3 . [27][28][29]39,40] Especially, HZSM-5 has been considered as an excellent candidate for methanol dehydration.…”

“…[27][28][29]39,40] Especially, HZSM-5 has been considered as an excellent candidate for methanol dehydration. [31][32][33][34][35][36][37][38] In addition, reaction conditions, [41][42][43][44][45][46][47][48] catalyst regeneration [49] and interaction between different functional components [50] have also been investigated. However, some deficiencies still exist in STD process over the hybrid catalyst.…”