Process for producing bio-products from biomass using rotary compression unit
A bio-product such as biochar, bio-coal, bio-oil, coke, and/or activated carbon material is formed by processing a starting biomass material comprising water-laden material. The starting biomass material is heated to below or above an autoignition temperature through a rotary compression unit (RCU) by generating steam through releasing unbound and bound waters in the biomass thus forming a bio-product. The biomass material being processed may be, without limitation, a woody or non-woody biomass material, such as cellulosic material and/or grain. The process can also form bio-oil from pyrolysis vapors which can be processed to other bio-products.
1. A method of producing bio-products from starting biomass materials, the method comprising the steps of:
providing a starting biomass material comprising a moisture-containing or water-laden material;
producing friction and compression to generate a desired elevated temperature and steam from bound and unbound water within the starting biomass material;
mixing and heating the starting biomass material resulting from the steam that is formed from increased friction and pressure such that the biomass flows evenly onto itself;
removing the bio-product;
cooling the bio-product; and
collecting the bio-product.
2. The method of claim 1 , wherein the starting biomass material is either a woody or a non-woody biomass.
3. The method of claim 1 , wherein the starting biomass material is heated to a temperature below autoignition.
4. The method of claim 3 , wherein steam explosion and hydro-flaking occurs by causing cell explosion and wherein the bio-product is dried flakes of the starting biomass material free from bound water.
5. The method of claim 4 , wherein the bio-product from the hydro-flaking is operable to form starting materials for any one of animal bedding, animal feed, and ethanol.
6. The method of claim 1 , wherein the starting biomass material is heated to a temperature at or above autoignition causing pyrolysis of the starting biomass material and wherein the pyrolysis reaction generates steam, pyrolysis vapors, and biochar.
7. The method of claim 6 , further comprising the step of condensing the bio-product.
8. The method of claim 7 , wherein the bio-product is bio-coal.
9. The method of claim 7 , further comprising the steps of condensing the pyrolysis vapors to generate a pyrolysis liquid, the pyrolysis liquid comprising bio-oil, pyroligneous acid (PLA), and tar and the bio-product is biochar.
10. The method of claim 9 , further comprising cooling the pyrolysis vapors and wherein the pyrolysis vapors move downward and then turn back upward, the cooling and turning of the pyrolysis vapors causing fines and particles of tar to drop.
11. The method of claim 10 , wherein the pyrolysis vapors are sprayed with water causing the pyrolysis vapors and the water to cool and condense into pyrolysis liquid forming a mixture of water, bio-oil and PLA.
12. The method of claim 11 , further comprising the steps of spraying water on the pyrolysis vapors to about 30-40% water mixed with the pyrolysis liquid and separating the bio-oil from the PLA.
13. The method of claim 9 , further comprising the steps of combining the bio-oil with the biochar forming a bio-coal.
14. The method of claim 9 , wherein the biochar is pretreated to remove inorganic compounds in order to form coke.
15. The method of claim 6 , further comprising subjecting the biochar to a second energy source and an activation agent in order to form activated carbon.
16. The method of claim 6 , wherein the biochar is used as a starting material for any one of a soil amendment, a filtration device, activated carbon, and graphene.