RT Conference Proceedings
T1 Kinetic study of methanol dehydration over Zro2 supported-activated carbons
A1 Palomo-Jiménez, José
A1 Rodríguez-Cano, Miguel Ángel
A1 Rosas-Martínez, Juana María
A1 Rodríguez-Mirasol, José
A1 Cordero-Alcántara, Tomás
K1 Carbón activado
AB The growing concerns about climate change and energy consumption have been the driving force inseek of alternative fuels such as DME, mainly produced via methanol dehydration over a solid acidcatalyst. The use of activated carbons for this aim has been little studied up to date. Only a few studiescan be found in the literature, reporting all of them materials with a low thermal stability of the acidsurface groups, which results into a fast deactivation of the catalyst.In this work, the preparation of activated carbons via chemical activation with phosphoric acid, theirmodification with different ZrO2loads, and their application as methanol dehydration catalysts have beenstudied. The catalytic results showed that the best methanol conversion and selectivity towards DMEwere achieved with the activated carbon prepared with an impregnation mass ratio value(H3PO4/precursor) of 2 and an activation temperature of 800 ºC, loaded with a 7 % (wt) of ZrO2. Thiscatalyst exhibits high steady state methanol conversion values even at temperatures as high as 400 ºC(XCH3OH= 80%, 0.1 g·s/μmol, PCH3OH= 0.08 atm in helium), keeping a selectivity to DME higher than96%. The effect of oxygen in the reaction atmosphere was also analysed. In this sense, an increase of15 % in the DME yield was obtained when using air instead of helium as reaction atmosphere (350 ºC,0.1 g·s/μmol, PCH3OH= 0.04 atm).A kinetic study has been carried out on this catalyst in which two mechanisms (Eley Rideal and LangmuirHinshelwood) for methanol dehydration have been analysed. The models proposed also consider thepresence of oxygen in the reaction media.
YR 2018
FD 2018-07-12
LK https://hdl.handle.net/10630/16207
UL https://hdl.handle.net/10630/16207
LA eng
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. MINECO (CTQ2015-68654-R).MECD  (FPU13/02413).
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026