Deoxygenation of Methanol over ZSM-5 in a High-Pressure Catalytic Pyroprobe

被引:7
作者
Gunawardena, Duminda A. [1 ]
Fernando, Sandun D. [1 ]
机构
[1] Texas A&M Univ, Dept Biol & Agr Engn, College Stn, TX 77845 USA
基金
美国国家科学基金会;
关键词
Catalysis; Gasoline; High-pressure catalytic pyroprobe; Methanol; ZSM-5; ZEOLITE CATALYSTS; LIGHT OLEFINS; MTO REACTION; CONVERSION; HYDROCARBONS; MECHANISM; SELECTIVITY; BENZENE; DEACTIVATION; H-ZSM-5;
D O I
10.1002/ceat.201000347
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Deoxygenation is a critical step in making hydrocarbon-rich biofuels from biomass constituents. Although the thermal effects of oxygenate aromatization have been widely reported, the effect of pressure on this critical reaction has not yet been closely investigated, one primary reason being the unavailability of a reactor that can pyrolyze oxygenates, especially those in solid form, under pressurized conditions. Here, the first of a series of studies on how oxygenates behave when catalytically pyrolyzed under elevated pressure and temperature conditions is reported. Methanol, the simplest alcohol, was selected as the candidate to study the chemical phenomena that occur under pressurized catalytic pyrolysis. The reactions were carried out over the shape-selective catalyst ZSM-5 (SiO2/Al2O3 = 30) under varying pressure (0 to 2.0684 MPa (300 psi) in 0.3447 MPa (50 psi) increments) and temperature (500 to 800 degrees C in 50 degrees C increments) conditions. Benzene, toluene, ethyl benzene, and xylenes (BTEX) were analyzed as the deoxygenated products of the reaction. The results indicate that the reactor pressure significantly affects deoxygenated product composition.
引用
收藏
页码:173 / 178
页数:6
相关论文
共 25 条
[1]   Aromatization of methanol and methylation of benzene over Mo2C/ZSM-5 catalysts [J].
Barthos, Robert ;
Bansagi, Tamas ;
Zakar, Timea Suli ;
Solymosi, Frigyes .
JOURNAL OF CATALYSIS, 2007, 247 (02) :368-378
[2]   TG-FTIR and isotopic studies on coke formation during the MTG process [J].
Bauer, F ;
Geidel, E ;
Geyer, W ;
Peuker, C .
MICROPOROUS AND MESOPOROUS MATERIALS, 1999, 29 (1-2) :109-115
[3]   Conversion of methanol to hydrocarbons over zeolite H-ZSM-5: On the origin of the olefinic species [J].
Bjorgen, Morten ;
Svelle, Stian ;
Joensen, Finn ;
Nerlov, Jesper ;
Kolboe, Stein ;
Bonino, Francesca ;
Palumbo, Luisa ;
Bordiga, Silvia ;
Olsbye, Unni .
JOURNAL OF CATALYSIS, 2007, 249 (02) :195-207
[4]   Methanol to hydrocarbons: spectroscopic studies and the significance of extra-framework aluminium [J].
Campbell, SM ;
Jiang, XZ ;
Howe, RF .
MICROPOROUS AND MESOPOROUS MATERIALS, 1999, 29 (1-2) :91-108
[5]  
CAMPO AES, 1998, ING ENG CHEM RES, V37, P2336
[6]   CONVERSION OF METHANOL AND OTHER O-COMPOUNDS TO HYDROCARBONS OVER ZEOLITE CATALYSTS [J].
CHANG, CD ;
SILVESTRI, AJ .
JOURNAL OF CATALYSIS, 1977, 47 (02) :249-259
[7]   The effect of crystal size of SAPO-34 on the selectivity and deactivation of the MTO reaction [J].
Chen, D ;
Moljord, K ;
Fuglerud, T ;
Holmen, A .
MICROPOROUS AND MESOPOROUS MATERIALS, 1999, 29 (1-2) :191-203
[8]   Selective transformation of methanol into light olefins over a mordenite catalyst: reaction scheme and mechanism [J].
Fougerit, JM ;
Gnep, NS ;
Guisnet, M .
MICROPOROUS AND MESOPOROUS MATERIALS, 1999, 29 (1-2) :79-89
[9]  
Gates B.C., 1991, Catalytic Chemistry
[10]   The mechanism of methanol to hydrocarbon catalysis [J].
Haw, JF ;
Song, WG ;
Marcus, DM ;
Nicholas, JB .
ACCOUNTS OF CHEMICAL RESEARCH, 2003, 36 (05) :317-326