Primarily. Gasoline. Methanol. Generation. Commercial technology with multiple technology .... New Zealand MTG Unit Gasoline Octane (R+O)*. *12 RVP.
ExxonMobil Methanol to Gasoline Commercially Proven Route for Production of Synthetic Gasoline
Routes for Synthetic Transportation Fuel Natural Gas Coal BioMass
Fischer Tropsch (LT)
Refining
Primarily Diesel
Methanol Generation
Methanol to Gasoline
Primarily Gasoline
SynGas Generation
Steam
• Both are 3 Step Process • Thermal Efficiencies are Essentially Governed by Coal or Natural Gas C/H Ratios • Coal is CH to Fuels plus CO2 • Natural gas is CH4 to Fuels plus H2O
Routes for Synthetic Transportation Fuel Natural Gas Coal BioMass
Commercial technology with multiple technology suppliers
SynGas Generation
Steam
Methanol Generation
Methanol to Gasoline
Primarily Gasoline
Comparison of Fischer Tropsch with MTG* ARGE FT (Low Temp) 2.0
Synthol FT (High Temp) 10.1
MTG
Ethylene
3.1
4.0
-
Ethane
1.8
4.0
0.4
Propylene
2.7
12.0
0.2
Propane
1.7
2.0
4.3
Butylenes
3.1
9.0
1.1
Butane
1.9
2.0
10.9
Naphtha
18
40.0
82.3
Gasoil/Distillate
14.0
7.0
-
Heavy Oil/Wax
52.0
4.0
-
-
3.2
0.1
100
100
100
Compound Methane
Oxygenates
* Shields, Fox & Chaung GPA 64th. Conv.
0.7
MTG Scale-up and Development • Unique “Shape Selective” chemistry discovered in the early 1970’s • Major Challenge – Make marketable gasoline • Development done through the 70’s on a verity of process options – Pilot operations up to 4 bpd in the US – Pilot operations up to 100 bpd in Germany
• Decision by New Zealand Government in 1979 to build commercial 14.5 kbd plant in New Plymouth NZ. Plant ownership 75% NZ Government/25% ExxonMobil • Plant started up 1985 and operated successfully for ~10 years till conversion to chemical grade Methanol production
MTG Product Yields
Products
Production Per 1000 tonnes MeOH
Fuel Gas, bbl FOE/Day
96.6
LPG, bbl/Day
420
Gasoline, bbl/Day
3200
MTG Commercialization • Fixed bed is generally conventional type hardware. However – Multireactor System – Cyclic Operation
• Feed can be a wide range of crude Methanol compositions (water/methanol) • Significant challenges in catalyst scale-up and development – Yield – Cycle length
• Advantages over Fischer Tropsch – Methanol is proven and widely used technology – Methanol is storable which enhances operability between stages – Methanol to Gasoline uses gas phase conventional type fixed bed reactors
Schematic of New Zealand Gas to Gasoline Complex Finished Gasoline
Fuel Gas / LPG
Natural Gas
Crude
Distillation
Water Product to Treatment
HGT
Methanol
Steam
Gasoline
MTG
Heavy
Methanol Synthesis
Light Gasoline
Blending
New Zealand Synfuel Plant Built with Modular Construction
•
A Methanol Plant Compressor in Route
•
Modular Construction History – Maximum Module • 33 by 15 Meters • 600 tonnes
– Total Lift • 66 Modules • 15,000 tonnes
New Zealand Synfuel Plant
Methanol 01 Production 100
MONTHLY Production (‘000’s te) Stream Factor (x)
80
60
40
20
0
Oct 1985
Feb 1986
Jun 1986 Production
Oct 1985 Stream Factor
Feb 1987
Methanol 02 Production 100
MONTHLY Production (‘000’s te) Stream Factor (x)
80
60
40
20
0
Oct 1985
Feb 1986
Jun 1986 Production
Oct 1985 Stream Factor
Feb 1987
Total Gasoline Yield 12
(te Gasoline / TJ Nat Gas)
11
10
9
8 Yield
7 Nov 1985
Mar 1986
Jul 1986
Nov 1986
New Zealand MTG Unit Gasoline Yield*
12 RVP GASO YIELD, WT PCT OF HC
95
90
85 Expected Plant
80
75 Jan
*12 RVP
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
New Zealand MTG Unit Gasoline Octane (R+O)*
12 RVP GASO YIELDRON+O
98 96 94 92 90 Expected Plant
88 86
Jan Feb Mar Apr May Jun *12 RVP
Jul Aug Sep Oct Nov Dec
New Zealand Finished Gasoline Quality Average
Range
Octane Number, RON
92.2
92.0 – 92.5
Octane Number, MON
82.6
82.2 – 83.0
Reid Vapor Pressure, kPa
85
82 – 90
Density, kg/m3
730
728 – 733
Induction Period, min.
325
260 – 370
Durene Content, wt%
2.0
1.74 – 2.29
% Evaporation at 70° C
31.5
29.5 – 34.5
% Evaporation at 100° C
53.2
51.5 – 55.5
% Evaporation at 180° C
94.9
94 – 96.5
End Point, °C
204.5
196 - 209
Distillation
Methanol to Gasoline Commercially Proven Route for Gasoline
