000 02291nmc a2200325 4500
005 20260520005651.0
008 260224s xxu
082 _aCD W938 1 0013960
210 _aWPC (16th.)
245 0 0 _aPotential and limitations of octane-boosting through isomerization of C7 alkanes over bifunctional zeolites
270 _a12/09/06 ; 26/08/2003
300 _a12 p.
520 _aResumen del autor, extraído del trabajo. The possibility of isomerizing the C7 cut obtained from atmospheric distillation of crude oil as an alternative to its aromatization is elucidated in model compound studies. It is shown that, over selected bifunctional zeolite and zeolite-like catalysts, n-heptane can be isomerized up to medium conversions without significant hydrocracking as consecutive reaction. However, the achieved degree of branching of the isomerization product and, therefore, its research octane number (RON), is much too low. Therefore, process flow schemes are discussed in which the unbranched and the only slightly branched isomers are separated from the di- and tribranched isoheptanes and recycled to the isomerization reactor. In principle, this allows to obtain a product consisting almost exclusively of highly branched heptanes. From model calculations it can be deduced that such a mixture would possess research octane numbers above 86. It is, moreover, shown that the desired molecular sieve separation of n-heptane and the monomethyl hexanes from their multiply branched isomers can be achieved using medium pore zeolites, e.g., silicalite-1 as adsorbent.
773 _gv. 3, p. 27
942 _cCONGTP
100 1 _aErnst, S.
_99859
100 1 _aBischof, C.
_99860
100 1 _aHartmann, M.
_99861
100 1 _aWeitkamp, J.
_99862
110 2 _aUniversity of Kaiserslautern. Department of Chemistry
_99863
110 2 _aUniversity of Stuttgart
_99864
111 2 _aWorld Petroleum Congress (16th. : 2000 jun. 11-15 : Calgary, Alberta, Canada)
_934
700 1 _aBischof, C.
_99860
700 1 _aHartmann, M.
_99861
700 1 _aWeitkamp, J.
_99862
710 2 _aUniversity of Kaiserslautern. Department of Chemistry
_99863
710 2 _aUniversity of Stuttgart
_99864
800 1 _aErnst, S.
_99859
999 _c133554
_d133554