DOEGO85004_1: Final Non-proprietary Technical Report, Generating Process and Economic Data for Preliminary Design of PureVision Biorefineries DOEGO85004_2: One Original Final Proprietary Technical Report to be mailed to DOE Golden. Page: 3 of 102

                                
TABLE OF CONTENTS
1.         PREAM            BLE       .......................................................................................................................................................5
PUREVISION'S FRACTIONATION TECHNOLOGY .........................................................................................................5
PROJECT OBJECTIVE ..................................................................................................................................................5
PROJECT TASKS, MILESTONES AND ASSOCIATED METRICS.......................................................................................6
2.         M   A   TERIALS              AND         M   ETH       O  DS.......................................................................................................................6
S U  B  S T R A  T E  ................................................................................................................................................................6
OPERATING CONDITIONS...........................................................................................................................................8
PROTOCOL FOR SAMPLE PREPARATION .....................................................................................................................9
LIGNIN PRECIPITATION............................................................................................................................................10
DATA        ANALYSIS......................................................................................................................................................10
SEVERITY FACTORS .................................................................................................................................................10
3. RESUL TS AND DISCUSSION ......................................................................................................................12
PUREVISION PROCESS: ORIGINAL DESIGN VS. MODIFIED DESIGN ..........................................................................12
TASK 1. OPTIMIZE FRACTIONATION OF CORN STOVER AT PDU-SCALE ..................................................................14
First Stage Optimization ....................................................................................................................................14
3 .1 .1 .1  .         A  u to h y  d ro ly  sis...........................................................................................................................................         14
3.1.1.2.              Acid     Catalyzed Prehydrolysis ....................................................................................................................15
3.1.1.3.              Cocurrent vs. Countercurrent M                        ode........................................................................................................... 15
Selection of Prehydrolysis Mode .................................................................................................................................... 17
Second Stage Optimization ................................................................................................................................17
Mass Balance .....................................................................................................................................................17
3.1.1.4.              Sugar Degradation under Alkaline Conditions........................................................................................                                           18
3.1.1.5.              Lignin      Analysis of Liquors and                   Solids...................................................................................................               18
3 .1 .1 .6  .         S o u  rc e s  o f  E rro rs  .......................................................................................................................................         1 8
Bagasse Fractionation .......................................................................................................................................19
TASK 2. INVESTIGATE CORN STOVER HYDROLYZATE LIQUOR FRACTIONS FOR SEPARATION AND PURIFICATION
TECHNIQUES AND COMMERCIAL APPLICATIONS .....................................................................................................19
Simulated Moving Bed Chromatography ...........................................................................................................19
NREL..................................................................................................................................................................19
PPG Industries...................................................................................................................................................20
University of Utah..............................................................................................................................................20
W  ey   erh   a e u ser   .....................................................................................................................................................2                           2
MAST .................................................................................................................................................................22
MTR ...................................................................................................................................................................22
TASK 3. CELLULOSE FRACTION EVALUATION, UTILIZATION AND MARKET ANALYSIS...........................................24
Enzymatic Hydrolysis.........................................................................................................................................24
Pulp and Paper Production ...............................................................................................................................24
TASK 4. PERFORM ASPEN MODELING OF THE PUREVISION BIOREFINING PROCESS .................................................25
Technoeconomic Analysis ..................................................................................................................................25
3 .1 .1 .7  .         M   e th o d o lo g y  ..............................................................................................................................................2          5
3 .1 .1 .8  .         A  n a ly sis   R  e su lts .........................................................................................................................................        2  7
Bagasse Feedstock Assessment ..........................................................................................................................28
TASK 5. FINALIZE PRELIMINARY DESIGN SPECIFICATIONS, ENGINEERING, AND COSTING FOR THE PROTOTYPE
REACTOR .................................................................................................................................................................29
4.         CON        CLU      SION.................................................................................................................................................29
5.         PRODUCTS DEVELOPED AND TECHNOLOGY TRANSFER ACTIVITIES......................................31
P  R E  SE  N T  A T  IO N  S  ......................................................................................................................................................3                           1
PUBLICATIONS .........................................................................................................................................................32
6.         FUTURE              W    ORK        .............................................................................................................................................32

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