Sir Eric Keightley Rideal FRS (11 April 1890 – 25 September 1974) was an English physical chemist. He worked on a wide range of subjects, including electrochemistry, chemical kinetics, catalysis, electrophoresis, colloids and surface chemistry. He is best known for the Eley–Rideal mechanism, which he proposed in 1938 with Daniel D. Eley. He is also known for the textbook that he authored, An Introduction to Surface Chemistry (1926), and was awarded honours for the research he carried out during both World Wars and for his services to chemistry.
Early years 
Eric Keightley Rideal was born on 11 April 1890 in Sydenham, which at that time was part of the county of Kent. His father was the chemist Samuel Rideal, whose work on water purification and disinfection included the Rideal–Walker test. His mother was Elizabeth Keightley, daughter of Samuel Keightley. Rideal was educated at Farnham Grammar School, Surrey, and then at Oundle School, Northamptonshire. In 1907 he won a scholarship in Natural Sciences to Trinity Hall, Cambridge. After he graduated in 1910 he continued his studies in Germany, obtaining his Ph.D. in chemistry in 1912 at the University of Bonn under Richard Anschütz.
When World War I broke out, Rideal was working on water supplies in Ecuador, an assignment that had come to him through his father. He returned home and enlisted with the Artists Rifles, eventually serving on the Western Front at the Somme in 1916 with the Royal Engineers. He was invalided home the same year after an outbreak of dysentery, and spent the rest of the war carrying out research in catalysis at University College London under Frederick G. Donnan. During this period he also worked with Hugh Stott Taylor, co-authoring Catalysis in Theory and Practice (1919), described as a "seminal" work in the field. Rideal was made MBE in 1918 for his war work.
Career and research 
Following the war, Rideal went to the USA in 1919 to take a position for a year as visiting professor at the University of Illinois at Urbana, a position for which he had been recommended by James Kendall. He then returned to the UK to take up a fellowship at his old college (Trinity Hall), and the Humphrey Owen Jones lectureship in physical chemistry at Cambridge. It was on the return voyage from the USA by ship in 1920 that he met his future wife Peggy (Margaret Atlee Jackson), whom he married the following year.
Rideal remained at Cambridge for the next 26 years, becoming Professor of Colloid Science in 1930, the same year he was made a Fellow of the Royal Society. During this time, he founded the Colloid Science Laboratory which became a world centre for surface science, and was used for war work during World War II. Rideal's students at Cambridge included the physicist and future novelist C. P. Snow, and the future Nobel laureate Ronald G. W. Norrish. Snow later depicted Rideal in two of his novels: The Search (1934) and Strangers and Brothers (1940). Rideal's career at Cambridge was disrupted by an operation in 1936 for an intestinal tumour, an operation that left him with a colectomy and dissuaded him from applying for the vacant chair of physical chemistry in 1937.
Following World War II, Rideal left Cambridge to take up the position of Fullerian Professor of Chemistry at the Royal Institution in London (1946 to 1949). This was followed by a period at King's College, London (1950 to 1955). After his retirement in 1955, Rideal took up a position as senior research fellow at Imperial College, enabling him to write the book Concepts in Catalysis (1968). It is estimated that over a period of some 60 years, Rideal authored or co-authored nearly 300 papers and a dozen books.
During his career, Rideal also gave a number of public lectures. These included the Cantor Lecture of the Royal Society of Arts (1921, 1924 and 1948). He also delivered the 1932 Robert Boyle Lecture, titled 'On some aspects of adsorption'. In 1947, Rideal gave the Royal Institution Christmas Lecture, titled 'Chemical Reactions: How They Work'.
In 1949, Rideal was one of the founding editors of the journal Advances in Catalysis.
Awards and honours 
Rideal was awarded the Davy Medal of the Royal Society in 1951 "For his distinguished contributions to the subject of surface chemistry". He was knighted in 1951 for his services to the Ministry of Supply during World War II. Also in 1951, he delivered the Bakerian Lecture with the title 'On Reactions in Monolayers'. Between 1951 and 1967 Rideal received honorary degrees from the universities of Dublin, Birmingham, Brunel, Belfast, Turin, and Bonn. He was also President of the Faraday Society (1938 to 1945), the Society of Chemical Industry (1945 to 1946), and the Chemical Society (1950 to 1952). He was elected a Fellow of King's College London in 1963.
Later years 
Rideal's name is still honoured today, with bursaries, grants, lectures and conferences named for him. The travel bursaries are administered jointly in the form of the Rideal Trust by the Royal Society of Chemistry and the Society of Chemical Industry. The Tadion–Rideal Prize for Molecular Science is an annual grant awarded by King's College London since 1983. The Sir Eric Rideal Lecture is a lectureship awarded every year since 1970 by the Society of Chemical Industry. The Rideal Conference is a triennial UK research conference on surface science and catalysis. It started in 1962 as the Chemisorption and Catalysis Conference and was renamed in his honour in 1971, with the 17th conference scheduled to take place in April 2011.
Selected works 
- Catalysis in Theory and Practice (1919, co-author)
- Industrial electrometallurgy (1919)
- Ozone (1920)
- An Introduction to Surface Chemistry (1926)
- Interfacial Phenomena (1963, co-author)
- Concepts in Catalysis (1968)
- Sixty Years of Chemistry (1970)
- Eley, D. D. (1976). "Eric Keightley Rideal. 11 April 1890 -- 25 September 1974". Biographical Memoirs of Fellows of the Royal Society 22: 381–326. doi:10.1098/rsbm.1976.0017.
- Rideal, Sir Eric Keightley (1890–1974) rev., D. D. Eley, Oxford Dictionary of National Biography, Oxford University Press, 2004, accessed 17 Feb 2011
- 'Biographical Notes' entry for Rideal in The World of Physical Chemistry, Keith J. Laidler, 1993, p. 445
- Sir Eric Keightly Rideal, The UCL Periodic Table of the Lecturers, UCL website, accessed 18 February 2011
- Rideal, Eric Keightley, Complete Dictionary of Scientific Biography. 2008. Retrieved February 18, 2011 from Encyclopedia.com
- Sir Eric K. Rideal (1890–1974) by D. D. Eley, in Advances in Catalysis (Eley and Weisz, 1977), pp.xiii–xv
- Eric Rideal, Notable Chemists section, Society of Chemical Industry website, accessed 18 February 2011
- The Rideals had a daughter, Mary, who married the future Lord Justice Peter Oliver, Baron Oliver of Aylmerton (see the ODNB entry)
- On some aspects of adsorption: being the thirty-fourth Robert Boyle lecture, delivered before the Oxford University Junior Scientific Club on May 13, 1932, Sir Eric Keightley Rideal, H. Milford and Oxford University Press, 1932
- Martin, T. (1948). "The Christmas Lectures at the Royal Institution". Physics Today 1 (3): 10. doi:10.1063/1.3066071.
- Davy archive winners 1989–1900, The Royal Society website, accessed 17 February 2011
- Rideal, E. (1951). "Bakerian Lecture. On Reactions in Monolayers". Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 209 (1099): 431–426. doi:10.1098/rspa.1951.0217.
- RIDEAL, Sir Eric, Who Was Who, A & C Black, 1920–2008; online edn, Oxford University Press, Dec 2007, accessed 18 Feb 2011
- The Chemical Society 1944 to 1980, RCS Presidents, Royal Society of Chemistry website, accessed 19/02/2011
- Sir Eric Rideal, The Times, 27 September 1974
- Sir Eric Rideal Travel Bursaries, Royal Society of Chemistry website, accessed 18 February 2011
- Tadion Rideal Prize Details, University of London, RDfunding.org.uk website, accessed 17 February 2011
- Sir Eric Rideal Lecture, Society of Chemical Industry website, accessed 18 February 2011
- Sir Eric Rideal, North American Catalysis Society website, accessed 17 February 2011
- Cardiff 2011 Rideal Conference, conference website, Cardiff University, accessed 17 February 2011
- Sir Eric Keightley Rideal, portrait circa 1922 (National Portrait Gallery)
- Sir Eric Keightley Rideal, portrait in later life (Advances in Catalysis, 1977)
- Eric Keightley Rideal (1890–1974) (Biography page at the Royal Institution)
- Eric Keightley Rideal (Archives page at the Royal Institution)
- Eric Rideal Collection (AIM25 listing of the collection at the Royal Institution)
- Rideal, Sir Eric Keightley (1890–1974) Knight Physical Chemist (The National Archives)
- Sir Eric Rideal (Obituary published in Nature)