Systems and apparatus for production of high-carbon biogenic reagents
This invention provides processes and systems for converting biomass into highcarbon biogenic reagents that are suitable for a variety of commercial applications. Some embodiments employ pyrolysis in the presence of an inert gas to generate hot pyrolyzed solids, condensable vapors, and non-condensable gases, followed by separation of vapors and gases, and cooling of the hot pyrolyzed solids in the presence of the inert gas. Additives may be introduced during processing or combined with the reagent, or both. The biogenic reagent may include at least 70 wt %, 80 wt %, 90 wt %, 95 wt %, or more total carbon on a dry basis. The biogenic reagent may have an energy content of at least 12,000 Btu/lb, 13,000 Btu/lb, 14,000 Btu/lb, or 14,500 Btu/lb on a dry basis. The biogenic reagent may be formed into fine powders, or structural objects.
1. A high-carbon biogenic reagent production system, the system comprising:
a material feed system, wherein the material feed system is configured to introduce a carbon-containing feedstock;
a preheater, wherein the preheater is disposed in operable communication with the material feed system, and wherein the preheater is configured to heat and/or preheat the feedstock;
a pyrolysis reactor, wherein the pyrolysis reactor is disposed in operable communication with the preheater, and wherein the pyrolysis reactor is configured to pyrolyze the feedstock;
a cooler, wherein the cooler is disposed in operable communication with the pyrolysis reactor, and wherein the cooler is configured to cool pyrolyzed solids;
a high-carbon biogenic reagent recovery unit, wherein the high-carbon biogenic reagent recovery unit is disposed in operable communication with the cooler;
a gas inlet, wherein the gas inlet is configured to introduce a substantially inert gas into the pyrolysis reactor; and
a gas outlet, wherein the gas outlet is configured to remove a condensable vapor or a non-condensable gas from the pyrolysis reactor.
2. The system of claim 1 , wherein the system comprises a dryer, wherein the dryer is operably connected to the material feed system.
3. The system of claim 1 , wherein the system comprises a deaerater, wherein the deaerater is operably disposed between the material feed system and the preheater.
4. The system of claim 1 , wherein the system comprises two gas inlets and two gas outlets.
5. The system of claim 1 , wherein the pyrolysis reactor or the cooler is configured with a gas inlet or the preheater is configured with a gas outlet, to thereby generate substantially countercurrent flow of the gas phase relative to the solid phase.
6. The system of claim 1 , wherein the system comprises an additive feeder, to thereby introduce an additive into the system.
7. The system of claim 1 , wherein the system comprises a reaction gas probe, wherein the reaction gas probe is disposed in operable communication with the pyrolysis reactor and with a gas-monitoring device.
8. The system of claim 7 , wherein the system comprises a second reaction gas probe, wherein the second reaction gas probe is disposed in operable communication with the preheater or the cooler and with the gas-monitoring device or a second gas-monitoring device.
9. The system of claim 7 , wherein the gas-monitoring device is selected from GC, MS, GC-MS, FTIR, or a combination thereof.
10. The system of claim 1 , wherein the system comprises a computer-programmed controller, wherein the computer-programmed controller is executable to utilize output from the gas monitoring device to thereby adjust a system set point.
11. The system of claim 1 , wherein the system comprises a process gas heater, wherein the process gas heater is disposed in operable communication with the gas outlet to thereby remove the condensable vapor or the non-condensable gas, wherein the process gas heater is configured to receive a separate fuel and an oxidant into a combustion chamber, wherein the combustion chamber is adapted for combustion of the fuel and the condensable vapor.
12. The system of claim 11 , wherein the system comprises a heat exchanger, wherein the heat exchanger is operably disposed between the process gas heater and the dryer, and wherein the heat exchanger is configured to utilize the heat of the combustion for the dryer.
13. The system of claim 11 , wherein the system comprises a heat exchanger, wherein the heat exchanger is operably disposed between the process gas heater and a gas inlet for a multiple-zone reactor, wherein the heat exchanger is configured to utilize the heat of the combustion for preheating a substantially inert gas prior to introduction into the pyrolysis reactor.
14. The system of claim 1 , wherein the system comprises a material enrichment unit, wherein the material enrichment unit is disposed in operable communication with the cooler, and wherein the material enrichment unit is configured to combine the condensable vapor, wherein the condensable vapor is in at least partially condensed form, with the solids, to thereby increase the carbon content of the high-carbon biogenic reagent obtained from the carbon recovery unit.
15. The system of claim 1 , wherein the system comprises a second pyrolysis reactor, wherein the second pyrolysis reactor is adapted to further pyrolyze the high-carbon biogenic reagent, to thereby further increase its carbon content.
16. The system of claim 1 , wherein the system comprises a second pyrolysis reactor, wherein the second pyrolysis reactor is adapted to further pyrolyze the high-carbon biogenic reagent in the presence of a second substantially inert gas, to thereby further increase its carbon content, wherein the process gas heater is configured to preheat the second substantially inert gas.
17. The system of claim 1 , wherein the system is configured for extracting and reusing gases from the biomass pyrolysis unit.
18. The system of claim 1 , wherein the system is configured for extracting and reusing gases from the carbon recovery unit.