Dr. Saeed Sahebdelfar received his PhD from Sharif University of Technology in 2002. He is now the manager of the Catalysis Research Group at Petrochemical Research and Technology Company. Dr. Sahebdelfar's main research interests include C1 chemistry on catalytic conversions of carbon dioxide and natural gas to synfuels and chemicals, petroleum refining, biomass conversions and environmental engineering. He has published over 80 original articles (h-index 26) and written or edited 5 books. Dr. Maryam Takht Ravanchi holds a PhD in Chemical Engineering. She is a researcher in the Catalysis Research Group at Petrochemical Research and Technology Company. Her research interests are in the fields of natural gas conversion, C1 chemistry, heterogeneous catalyst synthesis, membrane separation technologies and environmental research. Her recent research activities focus on carbon dioxide utilization, paraffin dehydrogenation, hydrogenation processes, and methanol synthesis. She has more than fifteen years of experience in the petrochemical industry as a process engineer and researcher. She has published about 70 journal papers, 70 conference papers, 6 national patents and 13 books (h-index 20 and i-10 index 29). Dr. Ashok Kumar Nadda is Assistant Professor in the Department of Biotechnology and Bioinformatics, Jaypee University of Information Technology, India. He worked as a postdoctoral fellow in the State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, China and as a Brain Pool Researcher/ Assistant Professor at Konkuk University, South Korea. Dr. Ashok has a keen interest in microbial enzymes, biocatalysis, CO2 conversion, biomass degradation, biofuel synthesis, and bioremediation. Dr. Ashok has published more than 120 scientific contributions in the form of research, review, books, book chapters and in various journals of international repute. He is the Series Editor of the Microbial Biotechnology for Environment, Energy and Health book series published by Taylor and Francis/CRC Press.