Catalytic steam reforming has grown during the last two or three decades
into one of the world's great catalytic processes. It is of major
economic significance since the products from it form the feed for a
number of other major processes. Nevertheless, catalytic steam reforming
is a relatively difficult technology. It operates at high temperatures
where problems of the maintenance of materials integrity and of catalyst
stability and activity are severe, the establishment of high thermal
efficiency of the plant is economically vital, and reactor operation is
strongly influenced by mass and heat transport effects. The process is
the subject of a thorough review by Dr. J. R. Rostrup-Nielsen who
discusses both the basic cataly- tic chemistry and the way in which this
is interrelated with reactor and plant design. The use of catalytic
converters for the purification of automotive exhaust gases is a
relatively new technology which was brought into existence by social
pressures for the preservation of acceptable environmental conditions.
The majority of catalytic practitioners have been able to watch the
growth of this technology from its inception to its current state of
sophistication. Automotive catalytic converter technology is now in a
mature state, and the chapter in this volume by Dr. K. C. Taylor
provides a review which covers both the process chemistry and the most
important converter design factors.