Progress Report
Zhou Jingjie2013/10/16
The addition of DMP
2CH3OH + CO2 ( CH3O) 2CO + H2O
(CH3O)2C(CH3)2 +H2O→ 2CH3OH+ (CH3)2COCH3OH
H2O
the reversible reaction hinders final production quantity
inactivation of catalysts
Water existence
TEM image of spindle CeO2
Effect of the content of DMP
DMP/ml DMC/(mmol/g)0 8.43065
1.2 19.096952.4 26.994833.6 28.242984.8 27.007837.2 24.0630211.8 20.10754
Effects of the amount of DMC on the amounts of DMPReaction conditions:T=140℃, t=2h,mcat=0.1g
Effect of Reaction Time
t/h DMC/(mmol/g)2 28.242984 29.86926 39.04383
12 44.1847924 57.02999
Effects of the amount of DMC on reaction timeReaction conditions: T=140 ℃VDMP=3.6ml,mcat=0.1g
Effect of the content of Catalyst
mcat/g DMC/(mmol/g) DMC/mmol0.5 6.66451 3.332260.1 28.24298 2.824298
0.05 35.54438 1.77722
Effects of the amount of DMC on the amount of catalyst Reaction conditions: T=140 ℃VDMP=3.6ml,t=2h
H2R, S2R
Thermodynamics calculation
(CH3O)2C(CH3)2 +H2O 2CH3OH+ (CH3)2CO
2CH3OH + CO2 ( CH3O) 2CO + H2O
298K, 0.1MPa(real liquid)
413.15K, 8MPa( saturated vapor)
413.5K, 8MPa( real liquid)
ΔH , ΔS
Tb, 0.1MPa(Saturated vapor)
413.15K, 8MPa( Ideal gas)
Tb, 0.1MPa( Ideal gas)
ΔvH, ΔvS
-H1R, -S1RΔHig, ΔSig
-ΔvH, -ΔvS
The Liquid Methanol Reforming
CH3OH+H2O=CO2+3H2
2CH3OH + CO2 (CH3O)2CO + H2O
catalyst CeO2 Pt/CeO2 Pt/Al2O3 和 CeO2 Pt/TiO2 和 CeO2
DMC/(mmol/g) 3.82040 0.46732 3.17957 4.09615
H2O
CO2
Low activity
Destruct the acid and basic sites
Cover the crystal surface of ( 111 ) The effect of the precursor
T/K P/MPa deltaH/KJ deltaS/(J/K) deltaG/KJ K
413.15 5 125.682 394.329 -37.235 5.11E+04
XRD
XRD patterns of CeO2
TEM/HRTEM images and structural model of CeO2 spindles: (a) TEM image (b) HRTEM image
(b)
((111)
0.308nm
(111)
2nm
(a)
2um
TEM
12
TEM/HRTEM images and structural model of Pt/CeO2 spindles: HRTEM image
(110)
(100)
EDS
Element Wt % At % C K 32.14 41.05 O K 60.51 58.02 PtM 01.50 00.12 CeL 04.59 00.50 CuK 01.26 00.30
EDS spectrum of Pt/CeO2
TPD
CO2-TPD patterns of Pt/CeO2 and CeO2
NH3-TPD patterns of Pt/CeO2 and CeO2
Coprecipitation method
*将硝酸盐溶解在去离子水中,将离子溶液加入到 CeO2中*加 25%的氨水溶液直至 PH=9.5,在 290K搅拌 1h*沉淀用 JGWP04700膜过滤,用去离子水洗涤*353K干燥 12h*在 H2氛围 673K还原 1h
*抽真空 673K,焙烧 30min
Work plan
Finish the experiment of the addition of DMP
*finish the calculation of the equation of the addition of DMP
Choose the feasible catalyst for the liquid methanol reforming *find the reason why the catalyst is not efficient
*look for the feasible catalyst, change the catalyst production method
Thanks for Your Attention!
Qs & As