Catalytic hydropyrolysis of organophillic biomass
View Patent ↗A process for producing fuel from biomass is disclosed herein. The process includes torrefying biomass material at a temperature between 80° C. and 300° C. to form particulated biomass having a mean average particle size from about 1 μm to about 1000 μm. The particulated biomass is mixed with a liquid to form a suspension, wherein the liquid comprises bio-oil, wherein the suspension includes between 1 weight percent to 40 weight percent particulated biomass. The suspension is fed into a hydropyrolysis reactor; and at least a portion of the particulated biomass of the suspension is converted into fuel.
1. A process for producing fuel from biomass comprising:
(i) torrefying biomass material at a temperature between 80° C. and 300° C., to form particulated biomass having a mean average particle size from about 1 μM to about 1000 μm;
(ii) mixing the particulated biomass with an organic liquid solvent to form a suspension, wherein the particulated biomass is present in the suspension in an amount between about 1 weight percent to about 40 weight percent, based on the total weight of the suspension;
(iii) feeding the suspension into a hydropyrolysis reactor;
(iv) feeding hydrogen into the hydropyrolysis reactor; and
(v) converting at least a portion of the particulate biomass of the suspension into bio-oil at a temperature of at least 300° C., and a pressure between 1 atm to 200 atm.
2. The process of claim 1 wherein the organic liquid solvent is bio-oil.
3. The process of claim 1 , wherein the organic liquid solvent is a mixture of bio-oil and liquid hydrocarbon, wherein the liquid hydrocarbon is obtained from a refinery stream.
4. The process of claim 3 , wherein the liquid hydrocarbon material is selected from the group consisting of naphtha, gasoil, light cycle oil, heavy cycle oil, atmospheric residuum, vacuum residuum, FCC bottoms, aromatic furfural extract, slurry oil, decant oil, de-asphalted oil, crude oil, atmospheric tower bottoms, atmospheric gas oil, vacuum gas oil, light vacuum gas oil, heavy vacuum gas oil, clarified slurry oil, hydrotreated vacuum gas oil, hydrotreated de-asphalted oil, coker gas oil, hydrotreated coker gas oil and mixtures thereof.
5. The process of claim 1 , further comprising: heating the suspension prior to feeding the suspension into the hydropyrolysis reactor.
6. The process of claim 1 , further comprising: demineralizing the biomass material prior to torrefying the biomass material, wherein following demineralization the biomass material has a mineral content of less than about 2.5 weight percent, based on a total composition of the biomass material.
7. The process of claim 6 , wherein the step of demineralizing the biomass material further comprises: soaking the solid biomass material with a solvent, and subsequently removing at least part of the solvent, wherein the solvent is selected from the group consisting of: an aqueous solvent, a mineral acid, an organic acid, acetic acid and a carboxylic acid, and wherein the solvent has a pH of less than about 7.
8. The process of claim 6 , wherein the step of demineralizing the biomass material further comprises: soaking the solid biomass material with a solvent, and subsequently removing at least part of the solvent, wherein the solvent is an aqueous basic solution and wherein the solvent has a pH above 7.
9. The process of claim 1 , further comprising: contacting the suspension with a heat-carrier material in the hydropyrolysis reactor.
10. The process of claim 9 , wherein the heat-carrier material is an inert material.
11. The process of claim 9 , wherein the heat carrier material further comprises a catalyst, the catalyst having a material selected from the group consisting of synthetic hydrotalcite or a calcinated synthetic hydrotalcite, a synthetic hydrotalcite-like material or a calcinated synthetic hydrotalcite-like material, a layered hydroxy salt or a calcinated layered hydroxy salt and mixtures thereof.
12. The process of claim 9 , wherein the heat carrier material further comprises a catalyst, the catalyst having a material selected from the group consisting of a zeolite, modified zeolites, ion-exchanged zeolites, dealuminated zeolites, ultrastable zeolites, ZSM-5, zeolite-Y, modified forms of ZSM-5 and zeolite-Y, and combinations thereof.
13. The process of claim 9 , wherein the heat carrier material further comprises a catalyst, the catalyst having a material selected from the group consisting of kaolin or calcinated kaolin or combinations thereof.
14. The process of claim 9 , wherein the heat carrier material further comprises a catalyst, the catalyst having a material selected from the group consisting of a mixed metal oxide or a calcinated mixed metal oxide, a supported noble metal, a supported transition metal and mixtures thereof.
15. The process of claim 14 wherein the metal oxide is selected from the group of alumina, zirconia, silica, silica-alumina, titiania, and combinations thereof.
16. The process of claim 14 wherein the catalyst is impregnated with transition metals selected from the group consisting of nickel, cobalt, tungsten, molybdenum and combinations thereof.
17. The process of claim 1 , wherein the step (v) of converting is in presence of a catalyst, and wherein the catalyst comprises a metal selected from the group consisting of Co, Mo, Ni, W and combinations thereof.
18. The process of claim 1 wherein the biomass is ligno-cellulosic biomass and further comprising removing at least a portion of the lignin from the biomass cellulose prior the step (i).
19. The process of claim 1 further comprising recycling hydrogen to the hydropyrolysis reactor.
20. The process of claim 1 wherein the process produces a gaseous product comprising a light hydrocarbon portion and further using the light hydrocarbon portion in a reforming process to produce hydrogen wherein hydrogen is recycled for use in the hydropyrolysis reactor.