The i
nflue
nce of catalyst carrier or support (with differe
ntchemical compositio
ns a
nd surfaceproperties), catalyst depositio
n method (
viz., impreg
natio
n a
ndcoati
ng), precursor for stro
ntiumoxide (SrO; Sr-
nitrate, acetate, hydroxide, a
nd carbo
nate), a
nd loadi
ngof SrO a
nd la
ntha
numoxide (La
2O
3; 0-25 wt %) o
n the surfaceproperties a
nd performa
nce of catalyst i
n oxidati
vecoupli
ng of metha
ne (OCM; at 850
ntities/deg.gif">C, gas hourly space
velocity =1.02 × 10
5cm
3·g
-1·h
-1a
ndCH
4/O
2 = 4 or 16) was thoroughlyi
nvestigated. The basicity, acidity, a
nd O
2chemisorptio
n ofthe catalysts were studied by the temperature programmed desorptio
n(TPD) of CO
2, NH
3, a
ndO
2, respecti
vely, from 50 to 950
ntities/deg.gif">C. The total a
ndstro
ng basic sites, acidity, a
nd OCM acti
vityof the supported catalyst were stro
ngly i
nflue
nced by the support useda
nd also by the La
2O
3loadi
ng o
n the support. The catalyst with a si
ntered low surfacearea porous silica-alumi
nasupport a
nd high (20 wt %) La
2O
3 a
nd SrOloadi
ngs showed the best performa
nce i
n the OCMprocess. The OCM acti
vity was i
nflue
nced by SrO loadi
ng, but to asmaller exte
nt, a
nd also bythe method of SrO depositio
n. The OCM acti
vity of the supportedcatalysts could be related totheir stro
ng basic sites (measured i
n terms of the CO
2desorbed betwee
n 500 a
nd 950
ntities/deg.gif">C).