Hydroconversion process and catalyst
A process and hydrodeoxygenation catalyst for producing high-quality diesel and naphtha fuels from a feedstock that contains oxygen containing components derived from renewable organic material in which the hydrodeoxygenation catalyst is a supported Mo catalyst and in which the support has a bimodal porous structure. The hydrodeoxygenation catalyst has a Mo content of 0.1 to 20 wt %. The support is alumina, silica, titania or combinations thereof, and the support has a bimodal porous structure with pores with a diameter larger than 50 nm that constitute at least 2 vol % of the total pore volume.
1. Process for production of a hydrocarbon fuel from renewable organic material of biological origin comprising the steps:
(a) forming a feedstock by combining a fossil hydrocarbon fuel with a renewable organic material wherein the content of renewable organic material material is 1 to 35 vol %; and
(b) mixing the feedstock of step (a) with a hydrogen-rich gas and conducting the combined stream to a hydrodeoxygenation stage by contacting said combined stream with a hydrodeoxygenation catalyst,
wherein the hydrodeoxygenation catalyst is a supported unpromoted Mo catalyst having Mo content of 0.1 to 20 wt %, the support being selected from alumina, silica, titania and combinations thereof, and said support having a bimodal porous structure with pores with a diameter larger than 50 nm that constitute at least 2 vol % of the total pore volume.
2. Process according to claim 1 , wherein the hydrogen-rich gas is a hydrogen-recycle gas stream, a hydrogen make-up gas or a combination of both.
3. Process according to claim 1 , wherein the hydrodeoxygenation catalyst of step (b) is Mo supported on alumina.
4. Process according to claim 1 , further comprising:
(c) passing the effluent stream from step (b) to a hydrotreating stage by contacting said stream with a hydrotreating catalyst.
5. Process according to claim 1 , further comprising:
(d) passing the effluent stream from step (b) or (c) to a hydroisomerization stage by contacting said stream with a hydroisomerization catalyst.
6. Process according to claim 1 , wherein the renewable organic material is selected from triglycerides, fatty acids, resin acids, fatty acid esters or combinations thereof.
7. Process according to claim 1 , wherein the hydrodeoxygenation step (b) is carried out at a hydrogen pressure of 1-200 bar, at a temperature of 50-350° C., and at a liquid hourly space velocity of 0.1-10 h −1 .
8. Process according to claim 1 , further comprising separating the effluent from any of the steps (b), (c) and (d) into a liquid effluent stream and a gaseous effluent stream, mixing said liquid effluent stream with a fresh hydrogen-rich gas, forming a purified hydrogen containing gas stream by removing H2S, NH3, CO, CO2 and light hydrocarbons from said gaseous effluent, and recycling said purified hydrogen containing gas to any of the steps (b), (c) and (d).
9. Process according to claim 1 , wherein steps (b), (c) and (d) are carried out in the same hydroprocessing reactor or in separate hydroprocessing reactors.
10. Process according to claim 4 , wherein the hydrotreating catalyst of step (c) comprises a metal component selected from Group VIII and/or VI of the Periodic System and being supported on a carrier containing alumina, silica, titania or combinations thereof.
11. Process according to claim 5 , wherein the hydroisomerization treating catalyst of step (d) comprises a metal component selected from Group VIII and/or VI of the Periodic System and being supported on a carrier containing alumina, silica, titania, silica-alumina, ZSM-5, zeolite beta or combinations thereof.
12. Process according to claim 5 , wherein the hydrotreating step (c) and hydroisomerization step (d) are carried out at a hydrogen pressure of 1-200 bar and at a temperature of 50-450° C., and at a liquid hourly space velocity of 0.1-10 h −1 .
13. A hydrodeoxygenation catalyst in the form of a supported unpromoted Mo catalyst having Mo content of 0.1 to 20 wt %, the support being selected from alumina, silica, titania, and combinations thereof, and said support having a bimodal porous structure with pores with a diameter larger than 50 nm that constitute at least 2 vol % of the total pore volume, for the treatment of feedstocks combining a fossil hydrocarbon fuel with a renewable organic material wherein the content of renewable organic material material is 1 to 35 vol %.