Physically pretreated biomass composition comprising high concentration of biomass
A biomass and pretreatment technology, applied in the preparation of sugar derivatives, sugar derivatives, sugar derivatives, etc., can solve the problems of low sugar conversion rate, increased investment cost, high power consumption, etc., and achieves the goal of reducing pretreatment costs. Effect
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Embodiment 1
[0054] Example 1: Preparation of Compositions for Physical Pretreatment of Herbaceous Biomass
[0055] To prepare physically pretreated herbal biomass compositions, the following experiments were performed.
[0056] Specifically, five types of herbaceous biomass including corn stover, wheat straw, grass, rice straw, and bagasse were physically pretreated by double-disc milling, grinder milling, hammer milling, or cutter milling. . Double-disk grinding was performed at 300 rpm for 10 minutes using a double-disc grinder (KHAM-30S, Hankook Mineral Powder, Co., Ltd.). In addition, grinder milling, hammer milling, and cutter milling were performed using a multipurpose grinder (Multi Mill, RD1-15, グローENGINEERING). Cutter milling and hammer milling used 2 mm sieves, and grinder milling was processed by adjusting the gap to 50 μm.
Embodiment 2
[0057] Example 2: Particle Size and Density Measurements and Compositional Analysis of Comminuted Biomass Compositions
[0058] The following experiments were performed to determine the particle size, density and composition of physically pretreated herbal biomass compositions.
[0059] Specifically, after tapping for 1 minute using 10 g of the physically pretreated composition prepared in Example 1 above, the density was measured by determining its volume (Table 1), and by using a particle size analyzer (Particle sizeAnalysis , LS I3 220, BECKMAN COULTER TM ) dry analysis measured the average particle size of the physical pretreatment composition (Table 2). In addition, the components of biomass processed by double disc milling were analyzed by the method of NREL Procedures LAP-002 (Table 3).
[0060] As a result, when processed by double disc milling, the average particle size was 50 μm or less, and the density was 0.5 g / ml or more, showing significant differences in ave...
Embodiment 3
[0070] Example 3: Evaluation of the Mixing Properties of Physically Pretreated Biomass Compositions and Solvents
[0071] In order to examine the mixing properties of solvents at 20% (w / w), which is a high concentration matrix condition for physically pretreated herbaceous biomass, 20 g of water was added to 5 g of ground treated biomass and stirred ( figure 1 ). As a result, in the case of physical pretreatments other than twin-disc milling, because due to the significantly low raw material density, with figure 1The moisture content is extremely limited compared to the biomass volume shown in , so at 20% (w / w) there is a phenomenon that the solvent does not wet the biomass sufficiently. However, when processed by twin disc milling, it was confirmed that mixing and flow was easy at a substrate concentration of 20% (w / w) due to smooth agitation.
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