Convective Boiling Heat Transfer of Methanol - Hydrogen Peroxide Solutions in a Microchannel Evaporator

•Develop a divergent microchannel evaporator with an innovative inlet design.•Decomposition of hydrogen peroxide making the boiling of the mixture extraordinary.•An optimal flow rate of 0.36 ml/min enhancing the critical heat flux most.•The mixture with C = 1/3 demonstrates the best heat transfer coefficient.•Competing effects between Marangoni convection and two-phase flow instability.