ATS-1 coated, microchannel reactor was fabricated onto silicon substrate using selective seeding and regrowth. The preparation technique's ability to engineer the zeolite film microstructure and chemistry was used to prepare TS-1 coatings with different titanium-contents and crystal sizes. The zeolite microreactor was utilized for 1-pentene epoxidation to 1,2-epoxypentane with hydrogen peroxide. This exothermic reaction can benefit by good heat transfer and containment of the oxidizing agent. A computational model was employed to simulate the reaction in the microreactor using kinetic data from batch reactor experiments. The influence of reactor geometry, catalyst properties and reaction conditions was evaluated and the results compared with experimental data.