Behavior of SAPO-11 as acid function in the direct synthesis of dimethyl ether from syngas and CO2

Publication date: 25 July 2018Source: Journal of Industrial and Engineering Chemistry, Volume 63Author(s): M. Sánchez-Contador, A. Ateka, A.T. Aguayo, J. BilbaoAbstractThe kinetic behavior for methanol dehydration of different SAPOs (-11 and -18) and HZSM-5 zeolites (with different acidity and various acidity modification treatments) has been studied under the suitable conditions for the direct synthesis of dimethyl ether (DME) from H2 + CO + CO2. SAPO-11 shows a good performance for methanol dehydration, with DME yield above 80% and negligible paraffin formation, and has been assessed as acid function of a bifunctional catalyst in the single-stage synthesis of DME (with CuO–ZnO–ZrO2 as metallic function, metallic/acid mass ratio = 1/2). The bifunctional catalyst (CZZr/S-11) shows a stable kinetic behavior with high selectivity to DME (over 80%).Graphical abstract

Source: Journal of Industrial and Engineering Chemistry - July 11, 2018 Category: Chemistry Source Type: research