Production of BHD (Bio Hydrofined Diesel) with Improved Cold Flow ...

Cracking Ratio, mass%
40
35
30
25
20
15
10
5
0
Amorphous Type
Zeolite Type
0 20 40 60 80 100
Isomerization Ratio, mass%
Fig. 7
Relationship between Isomerization and Cracking
The relationship between reaction pressure and feed conversion is shown in Fig. 8. Activity is
higher under low pressure conditions. It is thought that this is because dehydrogenation of normal
paraffin, which is the origin of the isomerization reaction, occurs more readily at lower pressure.
Feed Conversion, %
Fig. 8
100
80
60
40
20
0
3MPa
6MPa
10MPa
280 300 320 340 360
Reaction Temperature, ℃
Relationship between Reaction Pressure and Feed Conversion
3.3 Properties of isomerization products
Table 6 shows the properties of the isomerized BHD (isomerization ratio: 50%), which was made
by distilling off the fraction lighter than 185°C. The isomerized BHD has greatly improved cold flow
properties compared to the normal BHD. The cetane number was slightly lower after isomerization,
but the isomerized BHD still has a cetane number higher than that of conventional diesel oil, and
should have good ignition properties.
Table 6
Properties of Isomerized BHD