Welcome…!!! OLC International invites all the participants from all over the world to attend 2nd International Conference and Exhibition on Chemical Engineering & Catalysis during October 25-27, 2021 at Cologne, Germany which includes Keynote presentations, Oral talks, Poster presentations and Exhibitions and theme of the conference is "Revealing the Advances and Innovations in the Field of Chemical Engineering & Catalysis". Catalysis-2021 will have 5-6 world level (Highly cited class) plenary speakers, established Keynote speakers, active Invited speakers and fresh contributed speakers. In addition, variety of poster presentations along with workshops and special sessions would be interested in audience. The aim of the Catalysis-2021 is to promote quality research and real-world impact in an atmosphere of true international cooperation between scientists and engineers by bringing together the world class researchers, International Communities and Industrial heads to discuss the latest developments and innovations in the fields of Chemical Engineering & Catalysis. We sincerely hope that Catalysis-2021 serves as an international platform for meeting researchers from around the world, widen professional contact and create new opportunities, including establishing new collaborations. We are looking forward to seeing you at Catalysis-2021 in Cologne, Germany.