Process for upgradation of heavy crude oil/residue using waste plastic as hydrogen donating agent
Waste plastics are mixed with heavy crude and vacuum residues at temperature within the range from 180-220° C. and the resulting mixture are hydroprocessed to produce lighter products. The hydrodemetallization, asphaltene conversion and hydrocracking activities of the resulting mixture have been tested in an autoclave batch reactor. This process provides a very cheap material and method to upgrade problematic feeds to produce transportation fuels.
1. A process to make waste plastic as a hydrogen donating agent for hydro-conversion of heavy crude oil and vacuum residues, the process comprising the steps of:
a) mixing the heavy crude oil or the vacuum residues with waste plastic in a ratio in the range of 1:1 to 4:1 wt % and taken into a reactor vessel,
b) preheating the mixture obtained in step (a) at a temperature in the range of 130-220° C. for a period in the range of 20-30 minutes, resulting in a preheated mixture,
c) further heating the preheated mixture obtained in step (b) for hydrocracking reactions at a temperature in the range of 390-420° C. and at a pressure in the range of 40-100 kg/cm 2 for a period of 30-90 minutes with stirring in the presence of hydrogen in the reactor vessel to separate desired products.
2. The process as claimed in claim 1 , comprising a conversion of hydrodemetallization of 97 wt % and a conversion of hydrocracking of 84 wt % with vacuum residue (VR-I).
3. The process as claimed in claim 1 , wherein the heavy crude oil comprises a metals content >100 wppm; comprises a microcarbon residue content >3 wt %; and contains 550° C. plus material not less than 20 wt %.
4. The process as claimed in claim 1 , wherein the vacuum residues comprise a metals content >150 wppm; comprise a microcarbon residue content in the range 5-25 wt %; and contain 550° C. plus material not less than 60 wt %.
5. The process as claimed in claim 1 , wherein the waste plastic used in the process is plastic used for packaging purposes.
6. The process as claimed in claim 1 , wherein the desired product of the process is transportation fuels.
7. The process as claimed in claim 1 , wherein the process produces middle distillates.