This book is targeted to the readers who have interests in heterogeneous catalysis and its application in renewable energy conversion field. In order to get better understanding of what have been discussed in this book, the readers have to bear a basic knowledge regarding heterogeneous catalysis and chemical engineering. For those readers who have little or no background on heterogeneous and chemical engineering, it is better to refer to other books which give an entry level introduction to heterogeneous catalysis and chemical engineering while reading through this book. After reading this book, the readers will equip themselves with the strategies of logical development of a catalyst system for a certain application and the state-of- art techniques to efficiently and economically convert bioethanol to hydrogen, a crucial clean energy carrier for next generation. In addition, this book might also help the readers to realize the importance of creating an environmentally friendly and sustainable energy conversion technology and work with the author of this book together to make their own contributions to our future.