Silica gel is a spherical bread consisting of 97% silica and 3% alumina with a highly porous surface and a strong affinity for adsorbing water. One canister will maintain a safe level of humidity in a 3 cu. Silica gel sio 2 h 2 o perhaps the most commonly used desiccant, silica gel, is an amorphous form for silica manufactured from sodium silicate and sulfuric acid. Silica gel desiccants are often found in shoe boxes and with the packing of. Different types of desiccants and their moisture sorption capacities can be found in literature. Activated alumina activated alumina desiccant silica gel. A heat and mass transfer model in silica gel particle beds was developed with special. Silica gel is an amorphous and porous form of silicon dioxide silica, consisting of an irregular.
Compact in size, the sharpe desiccant system can be used. B desiccant dryer safety data sheet sds page 1 of 4 section 1. Rs pro silica gel desiccant according to regulation ec no 19072006, annex ii, as amended. Evaluation of the effectiveness of silica gel desiccant in. The material is designed to adsorb moisture from air. The thermal performance of a desiccant cooling system varies with indoor and outdoor temperature and humidity, and generally decreases as the dif ference between indoor and. Supplied as desiccant absorbent, silica gel conforms to us mild3464e, bs2540, sio 2 2o amorphous form of silica 7631869. Since silica gel fractures in the presence of liquid water. Moist indicators that are not or less harmful are available as an alternative. Silica gel,an amorphous solid,is the desiccant most often used in pharmaceutical applications. Desiccant silica gel pouch sorbipak in different grams. Drying agent wisepac active packaging components co.
Characterization of thermophysical properties of silica gel article pdf available in journal of porous media 217. Identification of the substancepreparation and companyundertaking product name. Durable construction watchdog desiccant breathers are manufactured from rugged abs plastic and impact modified acrylic. The manufacturer states that this is due to organic volatile. Desiccant calculation chart how much desiccant do you need. One indicator of overheated silica gel is the presence of black or blueblack silica beads. It must be protected by a 10% to 15% by weight layer of activated. This includes, small silica gel packets for retail. Desiccant material can be either clay or silica gel. Reusable desiccant canister silica gel inside effectively absorbs moisture through perforations in the aluminum case. Desiccant dehumidification analysis sep 2 1 2000rotc core. Safety data sheet pkt silica gel page 2 substance key. Silica gel is still classified as nonhazardous for transportation. Silica gel is a drying agent, often used for drying flowers.
One of the most important features of silica gel is that it is porous in nature. Silica gel is also applied as a selective adsorbent for a widerange. Silica gel desiccant desiccant bags and pouches anita pinkerton 20180906t12. Desicap customdesigned standard caps and vials offer an innovative desiccant to keep bottle contents fresh and dry. Silica gel desiccant food grade silica gel composition. Evaluation of the effectiveness of silica gel desiccant in improving the keeping quality of rice crackers article pdf available in international journal of science and research ijsr 61. Silica for safes 5 pack 60 gram silica gel desiccant packet for household or commercial 4. Indicating silica gel has the same absorbing capacities of regular silica gels.
Sds of the silica gel to assess the chemical properties, hazards of the desiccant material and. This silica gel appears orangeyellow in color when dry and green after the desiccant becomes saturated with moisture to about 15% by weight in addition, orange silica gel is a nontoxic, pollutionfree desiccant that will meet the needs of environmentallyconscious companies. You may notice a light odor when drying the silica gel. It is up to the packaging engineer to decide which properties of the desiccant are important to. Its structure is combined with a fan module that can be flipped.
Pdf evaluation of the effectiveness of silica gel desiccant in. Modeling and parametric analysis of silicagel desiccant wheels. Drikette paper is a clean, adsorbing paper comprised of silica gel. Delta adsorbents specializes in desiccant that provides humidity control for protecting machinery, products, and industrial processes from moisture. Water vapor adsorbent the silica gel used in the watchdog desiccant breathers adsorb up to 40% of its own weight. Silica gel packets are also often found in shoe boxes and other packages where moisture needs to be kept away from the product. Silica gel particles are composed of an interconnecting. Activated alumina, molecular sieve and silica gel are used in varying ratios depending on the application.
Silica gel is an amorphous form of silica sio 2 xh 2 o and is highly porous. Is a highsurfacearea, highly porous form of aluminum oxide. Silica gel is known to be a key absorbent of unwanted atmospheric hazards. Commission regulation eu no 2015830 of 28 may 2015. Because of its very large surface area silica gel exhibits a be reactivated without significantly impairing the dispose of and without any known adverse effects on the environment. What type of container or bag is being used for packaging. Silica gel desiccant 1 identification of the substancepreparation and the company silica gel desiccant application. This silica gel appears orangeyellow in color when dry and green after the desiccant becomes saturated with moisture to about 15% by.
Silica gel is a commonly used desiccant as beads packed in a permeable bag. Orange indicating beaded silica gel product numbers. The desiccant calculation chart below is specifically for estimating how much clay or silica gel desiccant you need. Two types of indicating silica gel orange indicating silica gel. However it changes color to alert the user that the desiccant is reaching its absorption. It can adsorb gases and liquids without changing its form. Desiccant molecular sieve silica gel activated alumina.
The long lasting, high crush strength media has a very high surfacevolume ratio. Silica gel particles are composed of an interconnecting network of microscopic pores capillaries, and therefore have a very. Analysis of the adsorption process and of desiccant cooling systems. As the desiccant removes the moisture from the air, desiccant.
H, the hysteresis corrected buffering capacity of silica gel, is the critical variable for assessing silica gel efficiency. Silica gel is an amorphous and porous form of silicon dioxide silica, consisting of an irregular tridimensional framework of alternating silicon and oxygen atoms with nanometerscale voids and. Facts and information about indicating desiccant 282kb pdf. What is the volume or area of the container formula. How much silica gel is required to control relative humidity in an exhibition case. Abstract it is important to understand how silica gels vary in performance in order to select the most costeffective gel for a particular application. Azorb desiccant solutions, llc offerings include silica gel desiccants, packaged and bulk desiccants used to absorb moisture, odor, oxygen and gases to impair or prevent the development of mold. Pesaran 5 deeply studied moisture transport in silica gels. Analysis of the adsorption process and of desiccant. The thermal performance of a desiccant cooling system varies with indoor and outdoor temperature and humidity, and generally decreases. Pdf on aug 28, 2014, thosapon katejanekarn and others published. Sharpes desiccant system is a convenient and cost effective means of ensuring your refinish work is never exposed to damaging moisture. The thermal performance of a desiccant cooling system varies with indoor and outdoor temperature and humidity, and generally decreases as the dif ference between indoor and outdoor conditions increases.
Thus, it was concluded that 5g silica gel was the best amount of desiccant to protect the quality of 100g rice crackers for a period of 6 months. Characterization of thermophysical properties of silica gel. Inert, stable and nontoxic desiccant that can hold up to 40% of its dry weight in water when in equilibrium with air at saturation certified to have bactericidal effect to contaminants and does not. The hazards of silica gel productip product compliance. How to redry regenerate silica gel the official line.
It is made by the reaction of sulfuric acid with sodium silicate to produce a hydrous gel, which is then dried to. Determining types and quantities of required desiccant. Inert, stable and nontoxic desiccant that can hold up to 40% of its dry weight in water when in equilibrium with air at saturation certified to have bactericidal effect to contaminants and does not emit particles to the processed air even when exposed to air at 100% rh the silica gel desiccant is not washed out. At high humidity levels, desi pak adsorbs moisture much more slowly than silica gel or molecular sieve, making handling less problematic. Every single gel bead contains millions of surface pores that. Property clay desiccant silica desiccant test methodcondition material composition montmorillonite clay silica gel na particle size 1. Silica gel desiccant is a nontoxic, nonflammable, and chemically inactive drying agent that adsorbs forty percent of its weight in moisture. Pdf performance test of a silica gel dehumidifier researchgate.
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