According to foreign media reports, scientists at Tokyo University of Science have used rust as a catalyst for the photo-assisted hydrogen production of organic waste and found that it produces 25 times more hydrogen than previous titanium dioxide catalysts. Countries such as Japan and South Korea regard hydrogen as the clean fuel of the future and are reorganizing to achieve a zero-emission "hydrogen economy", in which transportation will be mainly driven by fuel cell vehicles and hydrogen-fueled engine vehicles, which only emit water as the final product .
However, economical and sustainable hydrogen production methods have not been truly determined. Electrolysis wastes a lot of energy and consumes fresh water. Natural gas or coal production releases large amounts of carbon at the production site, eliminating any appreciable environmental benefits. The solar-powered photocatalytic process invented in the 1970s produced very little hydrogen, so it was not worth the trouble or expense of its titanium dioxide catalyst.
Now, a research team at Tokyo University of Science believes that it has found a cheap, efficient photocatalytic hydrogen production solution based on a special type of corrosion.
Using light from a xenon lamp, a water-methanol solution and a rust-type catalyst called α-FeOOH, the team found that the hydrogen produced was 25 times higher than previous titanium dioxide technology. Another benefit is that this particular form of corrosion seems to help prevent hydrogen from recombining with the oxygen in the container, making it easier to separate and avoid potential explosion hazards. This structure can produce hydrogen continuously and stably for more than 400 hours.
The team next plans to precisely study the role of oxygen in activating the light-induced α-FeOOH reaction, because when oxygen is removed from the reaction chamber, it completely stops working. Although this technology still needs to decompose water to produce hydrogen, this may be an effective method of using sunlight without any expensive catalysts.
The research was published in "Chemistry: A European Journal".
Cement-based non-shrinking self-leveling Grouting Material
KS series of grout is a high-tech one-component grouting material using Portland cement, pre-grade filler and additives that control the expansion in the plastic and can reduce water consumption.
Application of grouting Material:
Widely used in free-flowing precision grouting construction, including heavy machinery floor support, crane tracks and pillars foundation, but also can be used as mast, anchor bolt of the excellent reinforcement of grouting material; also is a good material for concrete repair works; design Beneath bridge supports, posts and flanged lamp posts, heavy pillar bases, and machine bases with dynamic loads. Such as thermal power plants, large paper mills, steel plant, steel mills, large machinery and equipment plants, cement plants.
Product advantages:
1, compensation shrinkage ---- gas expansion system, to compensate for shrinkage and settlement in the plastic slurry, to ensure that the grout material and the foundation in close contact
2, no chloride ---- The formula does not use chloride, thus avoiding the chloride hazards
3, high early strength ---- make the factory equipment faster to install and early use
4, non-ferrous ---- will not be rusty and stains or cracks due to rust expansion
5, reliability ---- factory pre-packaging materials, to eliminate the site produced by the error mixing
According to the standard:
KS series grouting material is based on the following part of the relevant standard test:
ASTMC-1107-97(Type)CRD-C621-82A
YB/T9261-1998 MS 522:part2:1989
ASTM C940-87 BS 4551:1980
JC/T986-2005
Expansion performance:
According to the American Standard ASTMC827 plasticizing stage test expansion rate of 0.5% or more, the long-term expansion of the curing stage to meet the requirements of the relevant standards.
Material properties:
|
project model |
KS-40 |
KS-60 |
KS-801 |
|||
|
40 |
401 |
60 |
601 |
|||
|
(mpa) compression strength(mpa) |
1 day |
20 |
22 |
25 |
30 |
45 |
|
28 day |
40 |
50 |
60 |
70 |
85 |
|
|
(mpa) Flexural strength(mpa) |
28 day |
9 |
10 |
12 |
12 |
12 |
|
Setting time |
Initial setting |
6.5h |
6.5h |
6h |
6h |
6h |
|
Final condensate
|
8h |
8h |
7.5h |
7.5h |
7.5h |
|
|
Expansion time |
Plastic stage |
Start 10min to initial setting |
Start 10min to initial setting |
Start 15min to initial setting |
Start 15min to initial setting |
Start 15min to initial setting |
|
Curing stage |
The final setting to cure more than 28 days |
The final setting to cure more than 28 days |
The final setting to cure more than 28 days |
The final setting to cure more than 28 days |
The final setting to cure more than 28 days |
|
|
Liquid density |
(kg/m³) |
2150 |
2150 |
2200 |
2200 |
2250 |
|
Water consumption |
Ks/dag |
3.8~4.0 |
3.8~4.0 |
3.8~4.0 |
3.8~4.0 |
3.6~3.8 |
1. floor grouting:
The flow distance should be determined based on the slit width and the liquid flow indenter to ensure that the grout flows from the gap to the front exit and the gap must not exceed 200 mm. If you guarantee a pressure head of 250mm, the maximum flow distance of up to 3 meters.
Note: The base surface must be constructed with oil-free and non-adherent loose material. If the surface of the concrete defects or slurry is cut intact before construction, the screw holes or solidified hole dust or sand blown net.
2. Floor:
Clean, no oil and other impurities must be removed to provide relief holes to ensure that all isolated areas are ventilated.
Pre-soaked: A few hours before grouting, the cleaned foundation must be submerged in water. Remove water from the free water and the hole just before pouring.
3. Stir:
To achieve the desired consistency, the amount of water must be accurate, the selected amount of water after slowly pouring it into the mixing vessel, while stirring feed, add complete package and continue stirring for 3-4 minutes until evenly dispersed, no knot Block phenomenon so far.
4. Grout:
The well-mixed material is poured over a period of 10 minutes to fully benefit from the expansion process. Each single perfusion thickness up to 200mm, the minimum width of the seam is 10mm.
5. Specific construction of large volume grouting:
Such as the thickness of more than 200mm. Aggregate grading (stones up to 10 mm in diameter) shall be added to the slurry to reduce the heat of hydration. The amount of aggregate used shall not exceed 1 part by weight of 1 part of KS series grout.
6.Low temperature construction:
When the temperature drops below 2 ° C, warm water (30-40 ° C) may be
used to accelerate the strength increase and the cementitious material
should be handled in winter.
High-temperature construction:
When the temperature exceeds 35 ℃, grouting material should be stored in a cool place, and cold water mixing.
Conservation:After grouting is complete, all exposed parts should be cured with Cask Cares or wet sacks.
Countermeasure :
KS series grout contains cement powder, which when mixed with gypsum or
when wet, releases alkali that is harmful to the skin. Avoid inhaling
dust and avoid touching the skin or eyes.
Estimation:pack
KS series grouting material) 25KG/bag
Under free flow the volume is about 13.0L
CONSTRUCTION schematic:
Storage:
KS series grouting material intact material in dry place storage period
of 12 months, if stored in high temperature and high temperature
storage area will be shortened.
Kasler Building Materials Co., Ltd.
guarantees the quality of its products manufactured and sold, and sells
it according to the agreed sales terms. Casper pledges to make every
effort to advise clients on the construction of the project,
recommending the use of solutions and materials. However, as we are
unable to exercise direct and continuous control over the use of our
products for sale, CASLUS BUILD MATERIALS CO., LTD can not afford to use
whatever advice our customers ultimately end up using and recommending
solutions and materials The use of the product caused by a variety of
direct or indirect responsibility.
Grouting Material
Grouting Material,Cement Grouting Material,High Strength Grouting Material,Non-Shrinkage Grouting Material
Jiangmen Kasole Building Materials Co., LTD. , https://www.kasole-paint.com