Yurii Shaevich Matros (Юрий Шаевич Матрос; September 16, 1937 – July 21, 2020) was a Soviet and American scientist in the field of chemical engineering, known for his achievement in the theory and practice of heterogeneous catalytic processes.

This reactor is widely known in scientific and applied literature as an example of an application of developed theory of forced unsteady processes.

As an overachieving student, he graduated from Odesa National Polytechnic University in 1959 with a red diploma (highest academic distinction).

The most frequently encountered example of unsteady-state operation is the reverse flow system (Matros reactor) in which the flow through reactor with fixed bed of catalysts is periodically reversed in order to store heat and/or mass, to regenerate heat/catalysts in situ, or to avoid kinetic limitation of a system at equilibrium.

Matros is one of the scientists of the Academy of Sciences who consistently brought his scientific achievements directly to industrial practice.

[12] His achievements have become the basis for a scientific school, which focuses on unsteady state processes in catalysis and which attracts post graduate students and collaboration among scientists from the former Soviet Union and other countries, such as Bulgaria, Hungary, India, Belgium, France, Switzerland, Poland, Germany, China, Italy and the United States.

The PL was about a new type of catalytic processes based on forced unsteady state conditions, was presented by Matros.

[15] It was written: “An excellent lecture delivered by Prof. J. Matros, ... to create a fundamentally new type of catalytic processes based on non-stationary mode.

The lecture was summarized the application of this technology in the industry around the world over the last several decades.”[15] Matros’ role in international conferences reflects recognition in this field of science.

One example of a recommendation includes the following fragment from BASF, signed by vice president of process chemistry, Blumenberg, on April 27, 1992: “He is one of the most famous chemical engineers, who are concerned with reactor technology ... BASF as one of the largest and most experienced chemical companies worldwide has acknowledged this by inviting Prof. Matros as a speaker on the occasion of its 125th anniversary in 1990 ... Prof. Matros has, besides his excellent research work, emphasized sharing of his knowledge with the scientific community.

Excellent textbooks and numerous publications have contributed to the spread of scientific progress around the world.” Another example of a recommendation includes the following fragment from the Head of Institute of Chemishe Verfahrenstechick of the University Stuttgart, Prof. Gerhat Eigenberger from April 23, 1992: “This letter attests to academic and experimental credentials of Dr. Y. Sh.