DOI: 10.1002/cphc.201201023 Unraveling the Reaction Mechanisms Governing Methanol- to-Olefins Catalysis by Theory and Experiment Karen Hemelsoet,* Jeroen Van der Mynsbrugge, Kristof De Wispelaere, Michel Waroquier, and Veronique Van Speybroeck* [a] # 2013 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim ChemPhysChem 2013, 14, 1526 – 1545 1526 CHEMPHYSCHEM REVIEWS