— Management Chemical Content of Rice Husk
The percentage of silica content varies from 90-98% with the change of region. The silica obtained is very largely amorphous. - IOSR Journal of Applied Chemistry
| Market | Market Size | Market Trend | Challenge |
| Rice Producer | 496 | Growing | Husk utilization |
| Oat Producer | 22 | Stable | No challenge |
| Barley Producer | 140 | Growing | Lack of Barley for beer production after beer utilization |
Source: Based on actual tests and EEM research
| The composition and properties | Unit | SiO2 96% | SiO2 99,99% |
| Powder Color | Light Gray | Snow White | |
| pH (5 g / 100 ml H2O) | 9,5 — 10,6 | 5,5 — 8,0 | |
| Surface area (BET analysis) | m2 / g | 167 | 350-600 |
| Moisture content, % (2 hours at 105 °C) | [%] | 1 | 10-27 |
| Loss on ignition (2 hours 1000 °C) | [%] | 1,5 | 13-30 |
| Total content of water-soluble salts | [%] | 5,3 | ≤ 2 |
| Carbon content | [%] | 1,5 | ≤ 0,01 |
| SiO2 content | [%] | 96,06 | 99,99 |
| Na2O content | [%] | 0,11 | Not detected |
| MgO content | [%] | 0,39 | Not detected |
| CaO content | [%] | 0,61 | Not detected |
| K2O content | [%] | 1,98 | Not detected |
| Cl content | [%] | 0,12 | Not detected |
| Al2O3 content | [%] | 0 | Not detected |
| P2O5 content | [%] | 0,31 | Not detected |
| SO3 content | [%] | 0,08 | Not detected |
| MnO content | [%] | 0,11 | Not detected |
| Mass fraction of residue on sieving on a sieve 75μm | [%] | 22 | 4-16 |
| FeO impurity | [%] | 0,23 | Not detected |
| Size of nanoparticles | nm | 0,23 | Not detected |
| Size of nanoparticles | nm | Not detected | 15-50 |
Source: Based on actual tests and EEM research
Component
N2
CO
CO2
H2
CH4
C2 H4 , C2 H6 , C2 H2
Composition
71%
12%
11%
4%
together less than 1%
During the implementation of the company's projects, amorphous silica was obtained, with a purity of 99.99%, with a surface area of 350-600 m2 / g (BET analysis). Setting up the equipment allows to produce a product with the different characteristics, depending by the preferences of the customer.
A highly developed surface determines the excellent sorption properties of silicon dioxide. It can selectively absorb from the environment or bind gases, vapors and dissolved substances. In the synthesis of amorphous silicon dioxide, is possible to preset the surface parameters (modify the surface) and thereby obtain a product with selective sorption. Chemical neutrality and the huge surface area of the resulting amorphous silica are able to impart new characteristics to different compositions, materials, products without changing their chemical properties
The large specific surface area of the resulting silica is an excellent material for modification. The modification of the silica particles with various modifying agents imparts new properties to the composite material.
For example, the use of composite materials based on silicon dioxide can increase the resistance to scratching and abrasion and the hardness of organically soluble 2K polyurethane coatings by 110%. The content of 5-10% per formulation is generally sufficient to obtain these advantages without impairing transparency, gloss, resistance to water condensate and adhesion of the coating.
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