Year1
- 规格：
- 0.5-1 1-2 2-4mm
- 外观：
- 黑色
The production and application of Nutshell Activated Carbon promote each other, and the application scope of Nutshell Activated Carbon is rapidly expanded. From the original single general-purpose carbon to a variety of specialized carbons, such as water purification carbon, sugar carbon, monosodium glutamate carbon,
oil carbon, gold carbon, carrier carbon, injection carbon, reagent carbon, etc., it shows that the fruit shell activated carbon Due to the booming domestic economy, the application volume has increased rapidly, and the export volume has increased due to the expansion of production and the reduction of production costs
. The application of nutshell activated carbon in my country has not only developed in the domestic market, but also entered the international market. Nutshell activated carbon is a very excellent adsorbent. It uses charcoal,
bamboo charcoal, various fruit shells and high-quality coal as raw materials. The raw materials are crushed, screened, catalyst activated, etc. through physical and chemical methods. It is manufactured through a series of processes such as rinsing, drying and screening.
It has the dual characteristics of physical adsorption and chemical adsorption, and can selectively adsorb various substances in the gas phase and liquid phase to achieve the purposes of decolorization, refining, disinfection, deodorization, decontamination and purification. Inspection standards can be in accordance with Chinese National Standard B, or in accordance with other national standards, such as American, Japanese, German standards, etc.
Nutshell activated carbon is widely used in all aspects of industrial and agricultural production, such as alkali-free deodorization (refined demercaptan), ethylene desalted water (refined filler), catalyst carrier (palladium,
platinum, < br />Rhodium, etc.), water purification and sewage treatment, power plant water quality treatment and protection in the chemical industry, chemical catalysts and carriers, gas purification, solvent recovery and grease, etc.
Decolorization, beverages and alcohol in the refined food industry Classification, refining of monosodium glutamate mother liquor and food, gold extraction in the decolorization gold industry, sewage treatment in the tail liquid recycling environmental protection industry, treatment of waste gas
and harmful gases, gas purification and filters in related industries, moisture-proof wooden floors, absorption Odor, automobile gasoline evaporation pollution control, preparation of various impregnating agent liquids, etc. Activated carbon will have excellent development prospects and a broad sales market in the future.
Main uses of activated carbon:
. Used for liquid phase adsorption activated carbon
? Tap water, industrial water, electroplating wastewater, pure water, beverages, food, water purification and electronic ultrapure water preparation .
?Decolorization, refining, impurity removal, purification and filtration of sucrose, xylose, MSG, citric acid, chemical products, and food additives
?Decolorization, impurity removal, and deodorization of grease, oil, gasoline, and diesel , Purification, deodorization, and impurity removal of alcohol and beverages
? Purification, refining, decolorization, and filtration of fine chemicals and biological process products.
?Purification, decolorization, deodorization and C reduction of environmental engineering wastewater and domestic wastewater
.Used for gas phase adsorption activated carbon
?Adsorption of benzene, diamine, oil, gas, C and other organic solvents Recycle.
?Filters, decoration deodorization, indoor air purification (removal of formaldehyde, benzene, etc.), industrial gas purification (such as C, etc.)
?Petrochemical industry production, natural gas purification, desulfurization, deodorization , Waste gas treatment
? Air purification and deodorization in biochemical, paint industries, underground places, leather factories, and animal breeding places.
?Adsorption of odor, sulfide adsorption, and removal of mercury vapor from flue gas to reduce the generation of dioxin.
. Used in high-demand fields of activated carbon
? Catalysts and catalyst carriers (palladium carbon catalyst, ruthenium carbon catalyst, rhodium carbon catalyst, platinum carbon catalyst), precious metal catalysts and synthetic diamond, gold extraction.
?Blood purification, automotive carbon canisters, high-performance fuel cells, double-layer supercapacitors, lithium battery anode materials, energy storage materials, military, aerospace and other high-demand fields.
Main factors affecting the adsorption of nutshell activated carbon
①Properties of nutshell activated carbon adsorbent
The larger its surface area, the stronger the adsorption capacity. Nutshell activated carbon is a non-polar molecule and is easy to adsorb non-polar molecules. The size, structure and distribution of pore
and surface chemical properties of adsorbents with very low sex or polarity also have a great influence on adsorption.
② The properties of the adsorbate
depend on its solubility, surface free energy, polarity, size and unsaturation of the adsorbate molecules, concentration of adsorbates, etc.
③ Wastewater value
Nutshell activated carbon generally has a higher adsorption rate in acidic solutions than in alkaline solutions.
The value will affect the existence state and solubility of the adsorbate in water, thus affecting the adsorption effect.
④ Coexisting substances
When multiple adsorbates coexist, the adsorption capacity of nutshell activated carbon for a certain adsorbate is worse than that when it only contains that adsorbate
⑤ Temperature
Temperature has little effect on the adsorption of fruit shell activated carbon
⑥Contact time
It should be ensured that there is a certain contact time between the fruit shell activated carbon and the adsorbent, so that the adsorption is close to equilibrium and the adsorption capacity is fully utilized.
Chemical Properties of Nut Shell Activated Carbon
In addition to physical adsorption, the adsorption of Nut Shell Activated Carbon also includes chemical adsorption. The adsorption properties of nutshell activated carbon depend on both the pore structure and the chemical composition.
Nutshell activated carbon not only contains carbon, but also contains a small amount of oxygen and hydrogen that are chemically bonded and functional groups, such as carbonyl groups, carboxyl groups, phenols, lactones, quinones, and ethers. These surfaces contain
some
oxides and complexes, some are derivatives from raw materials, and some are generated by the action of air or water vapor during or after activation. Surface sulfides and chlorides are sometimes produced.
During the activation, the minerals contained in the raw materials are concentrated into the nutshell activated carbon and become ash. The main components of the ash are salts of alkali metals and alkaline earth metals, such as carbonates and phosphates.
These ash contents can be reduced by water washing or pickling.
Catalytic properties of nut shell activated carbon
Nut shell activated carbon is accompanied by catalytic reactions in many adsorption processes, showing catalytic activity. For example, shell activated carbon adsorbs sulfur dioxide and catalytically oxidizes it into sulfur trioxide.
Due to the presence of specific surface oxygen-containing compounds or complexes, nutshell activated carbon has catalytic activity for a variety of reactions, such as generating phosgene from chlorine and carbon monoxide.
Since a complex will be formed between the nut shell activated carbon and the support, this complex catalyst greatly increases the catalytic activity, such as nut shell activated carbon supporting palladium salt, even if there is no copper salt catalyst
br />The oxidation reaction of olefins can also be carried out catalytically, and it is fast and highly selective.
Because nutshell activated carbon has a developed pore structure, a huge internal surface area, and good heat resistance, acid resistance, and alkali resistance, it can be used as a catalyst carrier. For example, in
hydrogenation, dehydrogenation cyclization, isomerization and other reactions in organic chemistry, nutshell activated carbon is an excellent carrier for platinum and palladium catalysts.
Mechanical properties of Nutshell Activated Carbon
Particle size: Use a set of standard sieve screening methods to find the weight of Nutshell Activated Carbon remaining in and passing through each sieve to express the particle size distribution.
Observational density or bulk density: the weight of nut shell activated carbon per unit volume of dietary pore volume and inter-particle void volume.
Bulk density and particle density: the weight of unit volume of nut shell activated carbon based on the pore volume but not the inter-particle void volume.
Strength: that is, the resistance to breakage of fruit shell activated carbon.
Wear resistance: the property of resistance to wear or friction.
These mechanical properties directly affect the application of Nutshell Activated Carbon, for example: Density affects the size of the container, and the thickness of the powdered carbon affects the filtration granular carbon particle size distribution, which affects fluid resistance and pressure drop. regeneration. < />
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