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Fume Extractor advice
thm_w:
--- Quote from: lfldp on October 26, 2023, 08:06:00 pm ---you have 100 grains of activated carbon and 100 grains of alumina - the 100 grains of alumina will have capacity to chemisorb 10 grams of formaldehyde
the 100 grains of activated carbon would have at last capacity to absorb 0,00001 grams of formaldehyde
--- End quote ---
So now its 1,000,000 times more effective than activated carbon? Before you said 100 times. Anyway your claim is incorrect as the number is 16mg/g for carbon.
--- Quote from: lfldp on October 26, 2023, 08:18:38 pm ---in yours photo diagram you have included comparise activated carbon vs activated alumina (white balls) not impregnated with potassium permagnate ! - white alumina balls have less capacity than alumina impregnated with potassium permagnate - the impregnation of kmn04 on alumina bed doubling its capacity do you understand this ? this is violet alumina called purple pellet (puratex) violet balls and its capacity is declared in % it can have 4 - 8 - 12% of kmn04 and if more have then more capacity you get
--- End quote ---
OK potassium permanganate impregnated activated alumina. Indeed it seems relatively cheap, but in my country I only see it available in very large 55lb bags.
I am sure it is effective and for some chemicals better than activated carbon (some not). But, you have not provided proper citations, only wild claims about its performance.
Here is a list of chemicals to get you started: https://academic.oup.com/annweh/article-abstract/38/5/753/165539
Please try to focus your thoughts into a single post.
lfldp:
--- Quote from: thm_w on October 26, 2023, 10:05:16 pm ---
--- Quote from: lfldp on October 26, 2023, 08:06:00 pm ---you have 100 grains of activated carbon and 100 grains of alumina - the 100 grains of alumina will have capacity to chemisorb 10 grams of formaldehyde
the 100 grains of activated carbon would have at last capacity to absorb 0,00001 grams of formaldehyde
--- End quote ---
So now its 1,000,000 times more effective than activated carbon? Before you said 100 times. Anyway your claim is incorrect as the number is 16mg/g for carbon.
--- Quote from: lfldp on October 26, 2023, 08:18:38 pm ---in yours photo diagram you have included comparise activated carbon vs activated alumina (white balls) not impregnated with potassium permagnate ! - white alumina balls have less capacity than alumina impregnated with potassium permagnate - the impregnation of kmn04 on alumina bed doubling its capacity do you understand this ? this is violet alumina called purple pellet (puratex) violet balls and its capacity is declared in % it can have 4 - 8 - 12% of kmn04 and if more have then more capacity you get
--- End quote ---
OK potassium permanganate impregnated activated alumina. Indeed it seems relatively cheap, but in my country I only see it available in very large 55lb bags.
I am sure it is effective and for some chemicals better than activated carbon (some not). But, you have not provided proper citations, only wild claims about its performance.
Here is a list of chemicals to get you started: https://academic.oup.com/annweh/article-abstract/38/5/753/165539
Please try to focus your thoughts into a single post.
--- End quote ---
--- Quote ---So now its 1,000,000 times more effective than activated carbon? Before you said 100 times. Anyway your claim is incorrect as the number is 16mg/g for carbon.
--- End quote ---
i give you just example as about technician documentations i should have on my pc old archives and when i find them ill upload you
--- Quote ---OK potassium permanganate impregnated activated alumina. Indeed it seems relatively cheap, but in my country I only see it available in very large 55lb bags.
I am sure it is effective and for some chemicals better than activated carbon (some not). But, you have not provided proper citations, only wild claims about its performance.
--- End quote ---
- problem is if you have 95% of chemicals very poor absorbed by activated carbon and 5% of chemicals good absorbed by activated carbon then impregnated alumina is the only choice
standard activated carbon is designed for this what it is - not for small angstrom diameter molecules , by using standard activated carbon for filter soldering fumes its like you use chinese drill for release rennovations by company - they pay few times more than for one dewalt drill at all , for small rennovation chinese drill is profitable
well try and do yours DIY soldering fume extractor filter and let us know yours results , i did create many of them in last few years and i just tryin to warn there people about this diy filters are not whorst to make them - ill upload photos later , the hepa filter and prefilter you can buy cheap and use and they will be ok but the GAS STAGE filter isnt profitable to make you have no access to specialised activated carbons industrial grade with impregnates and whatever you try to create you will pay much more than for bofa/chinese filters if you want to achieve same gas filtration results or nearest and filter will be very large
later ill upload you photos of what ive created if i find them
lfldp:
--- Quote from: thm_w on October 26, 2023, 10:05:16 pm ---
--- Quote from: lfldp on October 26, 2023, 08:06:00 pm ---you have 100 grains of activated carbon and 100 grains of alumina - the 100 grains of alumina will have capacity to chemisorb 10 grams of formaldehyde
the 100 grains of activated carbon would have at last capacity to absorb 0,00001 grams of formaldehyde
--- End quote ---
So now its 1,000,000 times more effective than activated carbon? Before you said 100 times. Anyway your claim is incorrect as the number is 16mg/g for carbon.
--- Quote from: lfldp on October 26, 2023, 08:18:38 pm ---in yours photo diagram you have included comparise activated carbon vs activated alumina (white balls) not impregnated with potassium permagnate ! - white alumina balls have less capacity than alumina impregnated with potassium permagnate - the impregnation of kmn04 on alumina bed doubling its capacity do you understand this ? this is violet alumina called purple pellet (puratex) violet balls and its capacity is declared in % it can have 4 - 8 - 12% of kmn04 and if more have then more capacity you get
--- End quote ---
OK potassium permanganate impregnated activated alumina. Indeed it seems relatively cheap, but in my country I only see it available in very large 55lb bags.
I am sure it is effective and for some chemicals better than activated carbon (some not). But, you have not provided proper citations, only wild claims about its performance.
Here is a list of chemicals to get you started: https://academic.oup.com/annweh/article-abstract/38/5/753/165539
Please try to focus your thoughts into a single post.
--- End quote ---
--- Quote ---Here is a list of chemicals to get you started: https://academic.oup.com/annweh/article-abstract/38/5/753/165539
--- End quote ---
most of desired soldering gas chemicals have size below 4A (angstroms) - there is also bed called molecular sieve type 3x 4x 13x , by 4x you can filter out most of soldering gas particles but from my experience these molecular sieves are less effective than activated alumina with kmno4
if you want relatively cheap activated alumina with kmn04 in poland one company selling it https://allegro.pl/oferta/aktywowany-tlenek-glinu-3-5mm-1000g-ka01-12850753880 - ask for purple balls 3-5mm but be aware this alumina cost 30% higher than camfil alumina and it have less effectivity but the camfil alumina you cannot buy just 1kg but minimum 20kg
this company have also molecular sieves (warning ! it is very irritant and if you dont mix it with high-quality activated carbon 30% sieve + 70% carbon) you will fell very irritant smell outgoing from yours filter - https://allegro.pl/oferta/sita-molekularne-molecular-sieve-12644223284
from my opinion for small soldering workplace need filter with at last 15 - 20kg of activated alumina 8% from camfil and this filter will cost more money than bofa filters and will be very large so is not profitable again but if you wanna play do it
lfldp:
--- Quote from: thm_w on October 26, 2023, 10:05:16 pm ---
--- Quote from: lfldp on October 26, 2023, 08:06:00 pm ---you have 100 grains of activated carbon and 100 grains of alumina - the 100 grains of alumina will have capacity to chemisorb 10 grams of formaldehyde
the 100 grains of activated carbon would have at last capacity to absorb 0,00001 grams of formaldehyde
--- End quote ---
So now its 1,000,000 times more effective than activated carbon? Before you said 100 times. Anyway your claim is incorrect as the number is 16mg/g for carbon.
--- Quote from: lfldp on October 26, 2023, 08:18:38 pm ---in yours photo diagram you have included comparise activated carbon vs activated alumina (white balls) not impregnated with potassium permagnate ! - white alumina balls have less capacity than alumina impregnated with potassium permagnate - the impregnation of kmn04 on alumina bed doubling its capacity do you understand this ? this is violet alumina called purple pellet (puratex) violet balls and its capacity is declared in % it can have 4 - 8 - 12% of kmn04 and if more have then more capacity you get
--- End quote ---
OK potassium permanganate impregnated activated alumina. Indeed it seems relatively cheap, but in my country I only see it available in very large 55lb bags.
I am sure it is effective and for some chemicals better than activated carbon (some not). But, you have not provided proper citations, only wild claims about its performance.
Here is a list of chemicals to get you started: https://academic.oup.com/annweh/article-abstract/38/5/753/165539
Please try to focus your thoughts into a single post.
--- End quote ---
also seems you still dont understand what is standard activated carbon available in internet shop than high-quality custom made activated carbon or treated activated carbon - the link you gave me claim about this company activated carbon impregnated with kmn04 works better than activated alumina impregnated with kmn04 for formaldehyde removal - all is depending on activated carbon type quality and impregnation value the problem is activated carbons cant be impregnated with high value of kmn04 the impregnation of bed damage part % of carbon quality the best bed for impregnation is activated alumina also it depend what kind of activated alumina they test vs they activated carbon because every alumina is different in quality activated carbons too
weller zero smog use speciall blend of activated alumina made by purafil it has more better quality and adsorbtion properties than activated alumina from camfil for sure... also purafil company release new activated alumina impregnated with different potassium - with that one one ball of alumina can get even 17% of potassium this is very high activity
lfldp:
--- Quote from: thm_w on October 26, 2023, 10:05:16 pm ---
--- Quote from: lfldp on October 26, 2023, 08:06:00 pm ---you have 100 grains of activated carbon and 100 grains of alumina - the 100 grains of alumina will have capacity to chemisorb 10 grams of formaldehyde
the 100 grains of activated carbon would have at last capacity to absorb 0,00001 grams of formaldehyde
--- End quote ---
So now its 1,000,000 times more effective than activated carbon? Before you said 100 times. Anyway your claim is incorrect as the number is 16mg/g for carbon.
--- Quote from: lfldp on October 26, 2023, 08:18:38 pm ---in yours photo diagram you have included comparise activated carbon vs activated alumina (white balls) not impregnated with potassium permagnate ! - white alumina balls have less capacity than alumina impregnated with potassium permagnate - the impregnation of kmn04 on alumina bed doubling its capacity do you understand this ? this is violet alumina called purple pellet (puratex) violet balls and its capacity is declared in % it can have 4 - 8 - 12% of kmn04 and if more have then more capacity you get
--- End quote ---
OK potassium permanganate impregnated activated alumina. Indeed it seems relatively cheap, but in my country I only see it available in very large 55lb bags.
I am sure it is effective and for some chemicals better than activated carbon (some not). But, you have not provided proper citations, only wild claims about its performance.
Here is a list of chemicals to get you started: https://academic.oup.com/annweh/article-abstract/38/5/753/165539
Please try to focus your thoughts into a single post.
--- End quote ---
ah and i forget again something :) the activated alumina purple with kmn04 you can buy small ammount from alibaba sellers - they have for sale "samples" and btw. you said the activated carbon absorb other chemicals than alumina cant - thats right but in "our case" solder fume extraction most of the smoke contain alot of molecular weight particles so the chemisorb (impregnated carbon or alumina) must be used and offcourse is mixed with standard activated carbon but alumina or threated carbon (purple carbon with kmn04 or other) is main most important part in these filters :( is very hard to filter solder gas particles they are not like odours and in reality someone must create very big filters to remove them but in commerciall solder fume extractors they use very high-activity filters for this is enough to put 1,5kg of this chemical filter thats why they cost alot but from my opinion the chinese filters like knokoo meet all needed requirements and i use them everyday instead of bofa v250
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