Abstract
Methylcyclohexane (MCH) dehydrogenation is an important reforming reaction and is considered as a model naphthene dehydrogenation reaction. An increase in the rate of this reaction with the addition of hydrogen at low pressures has been observed by various researchers in the field. This enhancement in rate is described, in the present study, using the concept of associative adsorption of MCH with hydrogen in Langmuir–Hinshelwood–Hougen–Watson single-site and dual-site surface reaction mechanisms. The various rate equations developed on these bases are tested against the experimental data of Usman over Pt/Al2O3 and the best-fit rate model is presented. An activation energy of 52.0 kJ mol−1 is obtained for the best-fit rate model.
Keywords
References
1.
Usman M.R.
(2010 ) Kinetics of methylcyclohexane dehydrogenation and reactor simulation for “on-board” hydrogen storage. The University of Manchester .
2.
Antos G.J.
, and
Aitani A.M.
(2004 ) Catalytic naphtha reforming. p. 7 . Marcel Dekker, Inc. , New York .
3.
Speight J.G.
, and
Özüm B.
(2002 ) Petroleum refining processes. p. 602 . Marcel Dekker, Inc. , New York .
4.
Usman M.R.
, and
Cresswell D.L.
(2013 ) Int. J. Green Energy , 10 , 177 –189 .
5.
Rohrer J.C.
, and
Sinfelt J.H.
(1962 ) J. Phys. Chem. , 66 , 1193 –1194 .
6.
Jossens L.
(1982 ) J. Catal. , 73 , 377 –386 .
7.
Usman M.R.
,
Aslam R.
, and
Alotaibi F.
(2011 ) Energy Sources, Part A Recover. Util. Environ. Eff. , 33 , 2264 –2271 .
8.
Usman M.R.
,
Cresswell D.L.
, and
Garforth A.A.
(2013 ) ISRN Chem. Eng. , 2013 , 1 –8 .
9.
Usman M.R.
,
Cresswell D.
, and
Garforth A.
(2012 ) Ind. Eng. Chem. Res. , 51 , 158 –170 .
10.
Kittrell J.R.
(1970 ) Adv. Chem. Eng. , 8 , 97 –183 .
11.
Schildhauer T.
(2001 ) J. Catal. , 198 , 355 –358 .
12.
Zengel A.E.
(1967 ) A study of methylcyclohexane dehydrogenation over a platinum on alumina catalyst at 602°F. Ohio State University , USA .
13.
Corma A.
,
Cid R.
, and
Agudo A.L.
(1979 ) Can. J. Chem. Eng. , 57 , 638 –642 .
14.
Touzani A.
,
Klvana D.
, and
Belanger G.
(1984 ) Stud. Surf. Sci. Catal. , 19 , 357 –364 .
15.
Van Trimpont P.A.
,
Marin G.B.
, and
Froment G.F.
(1986 ) Ind. Eng. Chem. Fundam. , 25 , 544 –553 .
16.
Chaouki J.
,
Touzani A.
,
Klvana D.
,
Belanger G.
, and
Bournonville J.P.
(1988 ) Oil Gas Sci. Technol. , 43 , 873 –881 .
17.
Chai M.R.
, and
Kawakami K.
(1991 ) J. Chem. Technol. Biotechnol. , 51 , 335 –345 .
18.
García de la Banda J.F.
,
Corma A.
, and
Melo F.V.
(1986 ) Appl. Catal. , 26 , 103 –121 .
19.
Tsakiris D.
(2007 ) Catalytic production of hydrogen from liquid organic hydride, The University of Manchester. Manchester, UK .
20.
Alhumaidan F.
,
Cresswell D.
, and
Garforth A.
(2011 ) Ind. Eng. Chem. Res. , 50 , 2509 –2522 .
21.
Blakely D.
(1976 ) J. Catal. , 42 , 181 –196 .
22.
Saeys M.
,
Reyniers M.
,
Thybaut J.
,
Neurock M.
, and
Marin G.
(2005 ) J. Catal. , 236 , 129 –138 .
23.
Usman M.R.
,
Cresswell D.L.
, and
Garforth A.A.
(2011 ) Pet. Sci. Technol. , 29 , 2247 –2257 .
24.
Sinfelt J.H.
,
Hurwitz H.
, and
Shulman R.A.
(1960 ) J. Phys. Chem. , 64 , 1559 –1562 .
25.
Jothimurugesan K.
,
Bhatia S.
, and
Srivastava R.D.
(1985 ) Ind. Eng. Chem. Fundam. , 24 , 433 –438 .
26.
El-Sawi M.
,
Infortuna F.A.
,
Lignola P.G.
,
Parmaliana A.
,
Frusteri F.
, and
Giordano N.
(1989 ) Chem. Eng. J. , 42 , 137 –144 .
27.
Maria G.
,
Marin A.
,
Wyss C.
,
Muller S.
, and
Newson E.
(1996 ) Chem. Eng. Sci. , 51 , 2891 –2896 .
28.
Ritchie A.W.
, and
Nixon A.C.
(1966 ) Ind. Eng. Chem. Prod. Res. Dev. , 5 , 59 –64 .
29.
Pacheco M.
(1985 ) J. Catal. , 96 , 507 –516 .
30.
Pal A.K.
,
Bhowmick M.
, and
Srivastava R.D.
(1986 ) Ind. Eng. Chem. Process Des. Dev. , 25 , 236 –241 .