a colourless gaseous hydrocarbon that is an isomer of butane and which is used as a fuel and a refrigerant. Formula: (CH3)3CH
isobutane in American English
(ˌaisəˈbjuːtein, -bjuːˈtein)
noun
Chemistry
a colorless, flammable gas, C4H10, used as a fuel, as a refrigerant, and in the manufacture of gasoline by alkylation
Word origin
[1875–80; iso- + butane]This word is first recorded in the period 1875–80. Other words that entered Englishat around the same time include: cross-fertilization, hat trick, musical chairs, overdraft, weekendiso- is a combining form meaning “equal,” used in the formation of compound words (isochromatic). In chemistry, iso- is used in the names of substances which are isomeric with the substance denotedby the base word (isocyanic acid). Other words that use the affix iso- include: isoelectronic, isomorphous, isoseismic, isostasy, isotope
Examples of 'isobutane' in a sentence
isobutane
Intrinsic activation energies and associated isobutane collision frequencies are also estimated.
Trevor C. Brown, David J. Miron, Abdullah K. Alanazi, Cam Le Minh 2013, 'Rate Parameter Distributions for Isobutane Dehydrogenation and Isobutene Dimerizationand Desorption over HZSM-5', Catalystshttp://www.mdpi.com/2073-4344/3/4/922. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Isobutane was mainly oxidized to iso-butene and carbon oxides.
GHEORGHITA MITRAN, IOAN–CEZAR MARCU, TATIANA YUZHAKOVA, IOAN SANDULESCU 2008, 'Selective oxidation of isobutane on V–Mo–O mixed oxide catalysts', Journal of the Serbian Chemical Societyhttp://www.shd.org.yu/JSCS/Vol73/No1/JSCS-3687.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
This in turn leads to an increase in the activity of the catalyst in the dehydrogenation of isobutane.
Giyjaz E. Bekmukhamedov, Alya N. Mukhamed'yarova, Svetlana R. Egorova, Alexander A.Lamberov 2016, 'Modification by SiO2 of Alumina Support for Light Alkane Dehydrogenation Catalysts',Catalystshttp://www.mdpi.com/2073-4344/6/10/162. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
For the zeotropic mixture, a mole fraction of 90% isobutane leads to the lowest specific costs per unit exergy.
Florian Heberle, Dieter Brüggemann 2016, 'Thermo-Economic Analysis of Zeotropic Mixtures and Pure Working Fluids in OrganicRankine Cycles for Waste Heat Recovery', Energieshttp://www.mdpi.com/1996-1073/9/4/226. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The absence of propane and the presence of isobutane (at lower temperature) among the products were discussed.
Janusz Ryczkowski, Marcin Kuśmierz, Dobiesław Nazimek, Sylwia Pasieczna 2002, 'Hydrogenolysis of n-Butane over Ru/AlO Catalysts', Adsorption Science & Technologyhttps://doi.org/10.1260/026361702321705276. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)