Adsorption Research Inc.

Management Team


ARI consists of a highly skilled team of professionals uniquely qualified to tackle your most challenging separation and purification projects.



Kent Knaebel, PE, Ph.D.

Founder & President

Dr. Kent Knaebel is the founder and president of ARI and has overall responsibility for the day-to-day operations of the firm. Considered one of the world's foremost adsorption experts, he teaches short courses on adsorption technology in the U.S. and Europe. In addition, he served as editor-in-chief of the journal, Adsorption, for its first 16 volumes, and is the founder of the International Adsorption Society. He has co-authored the textbook, Pressure Swing Adsorption, as well as the mass transfer chapter in the 7th and 8th editions of Perry's Chemical Engineers' Handbook.

Dr. Knaebel holds a bachelor's degree in chemical engineering from the University of Kentucky, and master's and Ph.D. degrees in chemical engineering from the University of Delaware. He taught at Ohio State University for twelve years in the chemical engineering department. Prior to his teaching career he worked for Eastman Chemical Co. He is a Professional Engineer, registered in Ohio. Dr. Knaebel has been awarded 16 US patents.


Heungsoo Shin, Ph.D.

Senior Research Engineer

Dr. Shin is Senior Research Engineer for ARI and holds bachelor's, master's and Ph.D. degrees in chemical engineering. His doctoral thesis was on pressure swing adsorption, from the Ohio State University. Dr. Shin's areas of expertise are in process development and computer modeling of adsorption processes. Prior to joining ARI, Dr. Shin taught chemical engineering in South Korea for 10 years.


Linda Kerscher, PE

Senior Chemical Engineer

Ms. Linda Kerscher is a Senior Chemical Engineer at ARI. She earned a bachelor's degree in chemical engineering from the Ohio State University and is a licensed Professional Engineer registered in the state of Ohio. She has been with ARI since 1993, and her specialties are process development, adsorbent evaluation, system troubleshooting, data acquisition, and process control.


Seth Knaebel, MS

Vice President & Chemical Engineer

Mr. Knaebel is a chemical engineer and Vice President at ARI. He earned bachelor's and master's degrees in chemical engineering from Carnegie Mellon University. His master's thesis focused on simulation and optimization of pressure swing adsorption systems. He joined ARI in 2004 and his specialties include biogas upgrading, natural gas processing, air separation, carbon dioxide capture from flue gas, adsorbent evaluation under extreme conditions, pilot plant studies, process controls, process integration, plant startup, and plant optimization.


Jarret Chirafisi

Director, Marketing & Business Development

Mr. Chirafisi serves as Director, Marketing & Business Development. He leads the company's brand building initiatives, business process refinement, and go-to-market strategy development & implementation in new and existing markets. He joined ARI in 2014 and brings nearly 15 years of marketing and portfolio management experience. He is skilled at building and refining product portfolios that deliver outstanding stakeholder value, leveraging key consumer insights to drive meaningful product innovation, and P&L management. He earned his MBA from Penn State's Smeal College of Business, as well as a BS in Multinational Business Operations and a BS in Information Studies from the Florida State University.