1 / 11

NREL/Neoterics Update—CAFI 2 Teleconference

NREL/Neoterics Update—CAFI 2 Teleconference. Rick Elander National Renewable Energy Laboratory National Bioenergy Center Golden, CO Tim Eggeman Neoterics International Lakewood, CO June 23, 2005. Biomass Refining CAFI. Agenda.

elpida
Download Presentation

NREL/Neoterics Update—CAFI 2 Teleconference

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. NREL/Neoterics Update—CAFI 2 Teleconference Rick Elander National Renewable Energy LaboratoryNational Bioenergy CenterGolden, CO Tim Eggeman Neoterics International Lakewood, CO June 23, 2005 Biomass Refining CAFI

  2. Agenda • Additional enzymatic digestibility data on NREL-generated dilute acid pretreated corn stover and hybrid poplar • Process economic modeling plans for CAFI 2 project Biomass Refining CAFI

  3. Additional Digestibility Data • Dilute acid pretreated stover and poplar samples generated by NREL for CAFI 2 project were also used in core DOE program work at NREL • SSF digestibility testing using standard current NREL LAP procedures (some differences from CAFI 2 digestibility protocol) • Enzyme loading on protein (not FPU) basis • Enzyme loading on per g cellulose in pretreated solids (not raw feedstock basis) • Digestibility in SSF mode using washed solids (yield based on conversion in cellulose in pretreated solids to ethanol) • Higher severity pretreated Kramer corn stover controls included • More digestible than CAFI 2-generated dilute acid pretreated corn stover Biomass Refining CAFI

  4. CAFI Labeling Nomenclature for Previously Sent Samples Biomass Refining CAFI

  5. 100 93.9 90 80.87 78.86 77.52 76.7 76.1 75.84 75.46 75.08 75.35 80 73.87 70 60 50 % Cellulose Conversion 40 30 20 10 0 LV, HT HV, LT HV. LT HV, HT Control Air only LV, HT + X HV, HT + X Control +X Air only + X Sunds High Severity HT = High Temperature Wash, LT = Low Temperature Wash HV = High Volume Wash, LV = Low Volume Wash SSF Digestibility of Dilute Acid Sunds Pretreated and Hot Washed Corn Stover to High Severity Pretreated Corn Stover Low Severity with Hot Wash Low Severity SSF using NREL LAP-008 on washed solids. Enzyme load: 20 mg “Old” Spezyme CP protein/g cellulose Conversion of cellulose entering SSF to ethanol after 168 hr X: Xylanase supplementation: 12 mg “Old” Spezyme CP protein + 8 mg Multifect Xylanase protein/g cellulose Biomass Refining CAFI

  6. Biomass Refining CAFI

  7. SSF Digestibility of Dilute Acid Pretreated Hybrid Poplar in NREL Steam Gun Using Various Enzyme Preparations • 190 C, 70 seconds, 0.02 g acid/g dry feedstock • Total enzyme load of 20 mg protein/g cellulose in treated feedstock [mix uses 12 mg protein/g cellulose of “new” Spezyme plus 8 mg protein/g cellulose of Multifect Xylanase]

  8. SSF Digestibility of Dilute Acid Sunds Pretreated and Hot 20 mg protein (GC 220)/g cellulose in pretreated poplar 100 93.40 16/4 = 16 mg protein (GC 220) + 4 mg protein (Multifect Xylanase)/g cellulose in pretreated poplar 90 12/8 = 12 mg protein (GC 220) + 8 mg protein (Multifect Xylanase)/g cellulose in pretreated poplar 80 70 63.05 62.72 62.02 60.35 60.24 56.87 60 52.54 51.87 50.47 49.02 48.24 47.21 50 %Cellulose Conversion 40 30 20 10 0 Water Hot-Wash Sunds Control (Mid) Air Blow Down only 0.5% EtOH Hot Wash Sunds Control (Early) 0.2% NaOH Hot Wash 0.2% NaOH Hot Wash NaOH and EtOH Hot Wash Steam Gun Pretreated Poplar Sunds Control (Mid)+ mix 12/8 Sunds Control (Mid) + mix 16/4 Sunds Control (Early) + mix 16/4 Sunds Control (Early) + mix 12/8 Washed Poplar Compared to Steam Gun Pretreated Poplar SSF using NREL LAP-008 on washed solids. Conversion of cellulose entering SSF to ethanol after 168 hr Biomass Refining CAFI

  9. Process Model - Pretreatment • Create Process Model for SO2 Pretreatment • Update Process Models for Other Pretreatments

  10. Process Model - Overall • NREL 2001 vs. NREL 2002 Model • Integrate into Updated Version of NREL’s 2002 Model • Front-end Feed Handling • Corn Stover • Poplar • State of Technology vs. Market Target

More Related