![]() ![]() ![]() There are two good economic reasons for cracking oil fractions – (i) there isn't enough of fuels like petrol or diesel in the original crude oil and (ii) alkenes are NOT found in oil, so must be manufactured from oil. petrol or diesel) and alkenes which are used to make polymers–plastics and other important compounds. The products are smaller alkanes used for fuels (e.g. – Cracking is a thermal decomposition process by which large alkane hydrocarbon molecules are broken down by passing them over a heated catalyst at high pressure. Cracking – a problem of supply and demand, other products ![]() Oil, useful products, environmental problems, introduction to organic chemistryĦ. Although not included your answer should include both chemical equations and a diagramĭoc Brown's GCSE/IGCSE/O Level KS4 science–CHEMISTRY Revision Notes To predict efficiently the heat transfer characteristics of the hydrocarbon fuel flowing inside the engine cooling channel with endothermic pyrolysis,a fast algorithm based on an n-decane thermal cracking mechanism is established for simulating the endothermic pyrolysis and supercritical-pressure heat transfer phenomena of n-decane.The three-dimensional look-up table method is adopted to acquire the thermo-physical properties of cracked mixtures.Meanwhile,the species transport equations are simplified,and finally only one species transport equation needs to be solved.The computational efficiency and accuracy of the fast algorithm are examined by comparing with the available experimental and numerical results.Results indicate that the computation efficiency is improved by about 20 times,with the computation accuracy being equivalent to that of the original algorithm,which solves fully species transport equations.Simulation of the endothermic pyrolysis and heat transfer processes of n-decane flowing inside a three-dimensional rectangular cooling channel under supercritical pressures demonstrates the accuracy of the proposed algorithm and its applicability in practice.2. ![]()
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