Welcome to "Environmental Models"

Envmodels is the first online calculation tool dedicated to environment. This brand new solution gives you access from Internet to powerful calculation tools without installing any software on your computer.

Envmodels website contains in particular :

A Free Tools section with many online conversion tools as well as vapour pressure calculation tools and Antoine's coefficients resolution tools,
A VOC Module section dedicated to calculation of Volatile Organic Compounds (VOC) emissions on industrial sites such as canalised emissions, diffuse emissions (theoretical calculation models) and fugitive emissions (emission factors).

Click here to try the depressurisation model for free

Moreover, Envmodels website includes a products database that contains 119 chemical products to be used in all the calculation tools. Envmodels members can also add and manage their own products.

Environment models seek to re-create what occurs during some events in nature. It is much easier and practical to create computer models to run certain experiments than it is to go out and do the same experiment again and again. Computer models take equations which were usually formulated through testing under natural conditions, and put them into computer programs where they can be run quickly and easily. A model can calculate the results of these equations using user inputs and show them to the screen for the user to view.

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Key words: antoine's coefficient antoine's contant antoine coefficient antoine constant antoine's equation antoine equation atmosphere emission air emission average emission factor batch breathing loss boiling breather vent canalised emissions canalised measurements canalised output canalized emissions carbon equivalent centrifuge chemical industry compressor seal condenser conversion tool connector daily insolation factor default zero emission rate depressurisation diffusion coefficient diffuse emissions dilatation distillate distillation equipment leaks emission rate environment environmental environment studies enrironement models environmental models EPA evaporation losses exhaust gas stream VOC emissions calculation factory chimney filling fid flame ionisation detector flowrate forced extraction freespace free liquid surface fugitive emissions gas stream gas sweep generic correlation factor grinding equipment heating heat heat-up ideal gas immiscible inert kelvin kpa leak leakage rate leak measurements loading load mass balance mass transfer coefficient material mathematical model minimum detection limit non miscible mixing tank mmhg mgC oil and gas production facillities open-ended line organic liquid overpressure pegged emission rate petroleum industry petroleum marketing terminals ppmv psia product progressive leaks purge pressure filter pressure relief valve production operations pump seal raoult's law refineries receiving vessel reclamation reflux response factor risk voc model voc models voc's model voc's models risk model risk models risk's model risk's models saturation factor sampling connection screening range emission factor speciation storage SOCMI solar absorptance spill solvent multi-solvent mono-solvent solvent tank throughtput tanker truck vapour balance transfer transfering transfer coefficient throughput vaccum valve vapor vapour pressure vapor pressure vapour expension vapour phase vent vessel headspace volatile organic compounds voc unit operation USEPA waste cleaning solvent weight liquid fraction working loss

Envmodels products : α,β-Dibromoethane sym-Dibromoethane EDB DBE Ethylene bromide Ethylene dibromide α-Methyltoluene Ethylbenzol Phenylethane α-Terpineol p-Menth-1-en-8-ol α,α,4-Trimethyl-3-cyclohexene 1-methanol β,β'-Dihydroxydiethyl ether Bis(β-hydroxyethyl) ether 2,2'-Oxybis-ethanol 3-Oxapentane-1,5-diol Glycol hydrox β-Ethoxyethanol Cellosolve Ethylene glycol ethyl ether Ethylene glycol monoethyl ether 2-Ethoxyethyl alcohol Ethyl-2-h γ-Butyrolactone γ-Hydroxybutyric acid cyclic ester γ-Hydroxybutyrolactone dihydro-2(3H)-Furanone Tetrahydro-2 (2-Methoxymethylethoxy) propanol 1-(2-methoxy-1-methylethoxy)-2-propanol DPGME dipropylene glycol methyl ether DPM MDP Methyl diproxitol - 1,2,3-Trimethylbenzene 1,2,4-Trimethylbenzene 1,2-Dibromoethane 1,2-dimethylbenzene 1,2-Dimethylcyclohexane 1,2-dimethyl(trans)-cyclohexane 1,2-Ethanediol 1,3,5-Trimethylbenzene 1,3-dimethylbenzene 1,4-dimethylbenzene 1,4-Dioxane 1-Butanol 1-Ethoxy-2-propanol 1-Methoxy-2-propanol 1-Methoxy-2-propanol acetate 2-Methoxy-1-methylethyl acetate Propylene glycol methyl ether acetate PGMEA 1-Methoxy-2-propyl acetate 1-Methylethyl benzene 1-Propoxy propan-2-ol Propylene glycol n-propyl ether PGPE PGnPE 1-Propoxy-2-propanol 100-41-4 100-42-5 100-51-6 103-09-3 103-65-1 104-51-8 104-76-7 105-46-4 105-53-3 106-35-4 106-42-3 106-93-4 106-97-8 107-21-1 107-41-5 107-83-5 107-98-2 108-01-0 108-05-4 108-10-1 108-11-2 108-20-3 108-21-4 108-32-7 108-38-3 108-65-6 108-67-8 108-83-8 108-88-3 108-90-7 108-93-0 108-94-1 109-60-4 109-66-0 109-87-5 109-99-9 110-05-4 110-19-0 110-49-6 110-54-3 110-80-5 110-82-7 110-86-1 111-15-9 111-46-6 111-65-9 111-76-2 111-90-0 111-96-6 112-07-2 112-15-2 112-34-5 112-40-3 112-49-2 115-07-1 115-11-7 121-44-8 123-42-2 123-86-4 123-91-1 124-18-5 1330-20-7 141-32-2 141-78-6 142-82-5 1569-01-3 1569-02-4 1634-04-4 1678-91-7 2,2'-Oxybis[N,N-dimethylethylamine] 2,3-Butanedione 2,5,8,11-Tetraoxadodecane 2-(2-Butoxyethoxy) ethanol 2-(2-Ethoxyethoxy) ethanol 2-(2-Ethoxyethoxy) ethyl acetate 2-Butanol 2-Butanone 2-Butoxyethanol 2-Butoxyethyl acetate 2-Butyl acetate 2-Diméthylaminoéthanol; N,N-Diméthyl éthanolamine; DMAE; Norcholine; Propamine A; Dimethyl(2-hydroxyethyl)amine 2-Ethoxy ethanol 2-Ethoxy-1-methylethyl acetate 2-Ethoxyethyl acetate 2-Ethyl-1-butanol 2-Ethyl-1-hexanol 2-Ethylhexyl acetate 2-Furaldehyde 2-Furancarboxaldehyde 2-Hydroxyethyl acrylate 2-Methoxy-2-methyl-propane 2-Methoxyethanol acetate Ethylene glycol methyl ether acetate β-Methoxyethyl acetate Ethylene glycol monomethyl ether acetate 2-Methoxyethyl acetate 2-Methoxyethyl ether 2-Methyl-1-propanol Isobutyl alcohol 2-Methylpropanol 2-Methyl-1-propene 2-Methyl-2,4-pentanediol 2-Methyl-2-butanol 2-Methyl-propanal 2-Methylbutane 2-Methylpropyl acetate Isobutyl ethanoate 2-Methylpropyl ester acetic acid Isobutyl ester aetic acid β-Methylpropyl ethanoate 2-Methylpropyl acetate 2-n-Butoxy-1-ethanol β-Butoxyethanol Butyl glycol Butyl oxitol Ethylene glycol butyl ether Ethylene glycol monobutyl ether Glycol butyl ether 3-Oxa-1-heptanol Butyl 2-hydroxyethyl ether 2-Hydroxyethyl n-butyl ether EGBE 2-Propanol Isopropanol sec-Propyl Alcohol 1-Methylethyl Alcohol 2-Hydroxypropane 2-Propanone 2-Propenoic acid 2-Propyleneglycol-ethyl ether acetate 2PG1EEA 1-Ethoxy-2-propyl acetate 1-Ethoxy-2-propanol acetate 3-Heptanone 3033-62-3 34590-94-8 4-Hydroxy-4-methyl-2-pentanone 4-Methyl-1,3-dioxolan-2-one Cyclic methylethylene carbonate Cyclic propylene carbonate 1,2-Propanediol carbonate 4-Methyl-2-pentanol 4-Methyl-2-pentanone MIBK Hexone Isopropylacetone MIK 2-Methylpropyl methyl ketone 4-Methyl-2-oxopentane 431-03-8 493-01-6 493-02-7 526-73-8 54839-24-6 60-29-7 628-63-7 64-17-5 64-19-7 64742-94-5 64742-95-6 67-56-1 67-63-0 67-64-1 67-66-3 68-12-2 6876-23-9 71-23-8 71-36-3 71-43-2 74-82-8 74-84-0 74-85-1 74-98-6 75-05-8 75-09-2 75-85-4 7732-18-5 78-40-0 78-78-4 78-83-1 78-84-2 78-92-2 78-93-3 79-10-7 79-20-9 80-62-6 818-61-1 872-50-4 95-47-6 95-63-6 96-48-0 97-88-1 97-95-0 98-01-1 98-55-5 98-82-8 98-94-2 Acetic acid Acetic acid 2-ethyl-hexyl ester Isooctyl acetate 2-Ethyl-1-hexanol acetate β-ethylhexyl acetate 2-Ethylhexyl ethanoate 2-Ethylhexanyl acetate Acetic acid ethenyl ester 1-Acetoxyethylene Acetic acid vinyl ester Ethenyl ethanoate Ethanoic acid ethenyl ester Acetic acid ethyl ester Acetoxyethane Ethyl acetic ester Ethyl ethanoate Acetone Acetonitrile Acetonyldimethylcarbinol Diacetone alcohol Tyranton Pyranton a Acrylic acid butyl ester n-Butyl acrylate Acrylic acid Acroleic acid Ethylenecarboxylic acid Vinylformic acid Glacial acrylic acid Aromatic 100 Solvent 100 Aromatic 150 Solvent 150 Benzene Benzenemethanol α-Hydroxytoluene α-Toluenol Phenylcarbinol Phenylmethyl alcohol Benzyl alcohol Bis(2-Dimethylaminoethyl) ether BDMAEE 2,2'-Oxybis[N,N-dimethylethanamine] N-(2-[2-(Dimethylamino)ethoxy]ethyl)-N,N-dimethylamine Butane Butanedione 2,3-Dioxobutane Butadione Biacetyl Diacetyl Dimethyl diketone Dimethyl glyoxal 2,3-Diketobutane Butyl acetate Butyl acrylate Butyl diglycol Butyl Carbitol Butoxyethoxyethanol Diglycol monobutyl ether Butyl methacrylate Butylbenzene Butylglycol acetate 1-Acetoxy-2-butoxyethane Ethylene glycol monobutyl ether acetate 2-Butoxyethanol acetate 2-Butoxyethyl ester acetic acid Butyrolactone C10H14 C10H18 C10H18O C10H20O2 C10H22 C12H26 C2H3N C2H4 C2H4Br2 C2H4O2 C2H6 C2H6O C2H6O2 C3H4O2 C3H6 C3H6O C3H6O2 C3H7NO C3H8 C3H8O C3H8O2 C4H10 C4H10O C4H10O2 C4H10O3 C4H11NO C4H6O2 C4H6O3 C4H8 C4H8O C4H8O2 C5H10O2 C5H10O3 C5H12 C5H12O C5H12O2 C5H4O2 C5H5N C5H8O2 C5H8O3 C5H9NO C6H10O C6H12 C6H12O C6H12O2 C6H12O3 C6H14 C6H14O C6H14O2 C6H14O3 C6H15N C6H15O4P C6H5Cl C6H6 C7H12O2 C7H12O4 C7H14O C7H14O2 C7H14O3 C7H16 C7H16O3 C7H8 C7H8O C8H10 C8H14O2 C8H16 C8H16O3 C8H16O4 C8H17N C8H18 C8H18O C8H18O2 C8H18O3 C8H18O4 C8H20N2O C8H8 C9H12 C9H18O Carbitol Diethylene Glycol ethyl ether Diethylene glycol monoethyl ether Diglycol monoethyl ether Dioxitol Ethoxy diglycol, CH2Cl2 CH3OH CH4 CHCl3 Chlorobenzene Chloroform Cis-Bicyclo[4.4.0]decane cis-Decalin cis-Perhydronaphthalene Cis-Decahydronaphthalene Cumene Isopropylbenzene 2-Phenylpropane Isopropylbenzol Cumol Cyanomethane Ethanenitrile Ethyl nitrile Methanecarbonitrile Methyl cyanide Cyclohexane Cyclohexanol Cyclohexanone Cyclohexyl alcohol Adronal Hydroxycyclohexane 1-Cyclohexanol DCM Dichloromethane Methylene dichloride Methane dichloride Methylene bichloride Decane Di-tert-butyl peroxide Diethyl malonate Diethylene dioxide Dioxyethylene ether p-Dioxane Diethylene glycol Diethylene glycol dimethyl ether Diglyme Bis(2-methoxyethyl) ether Di(2-Methoxyethyl) ether Dimethyl carbitol 2-(2-Methoxyethoxy)-1-methoxyethane 2,5,8-Trioxanonane Dimethoxydiethylene glycol 1-1'-oxybis(2-methoxy-ethane) DEGDME Diethylene Glycol Monoethyl Ether Acetate DEGEEA Carbitol acetate Diglycol monoethyl ether acetate Acetic acid 2-(2-ethoxyethoxy)ethyl ester Diisobutyl ketone Diisopropyl ether Dimethoxymethane Dimethyl formal Formal Formaldehyde dimethyl acetal Methoxymethyl methyl ether Methylal Methylene dimethyl ether Methylene Dimethylaminoethanol Dimethylbenzene Dimethylformamide DMF DMFA N-Formyldimethylamine Dodecane DTBP Bis(tert-butyl) peroxide 2-(tert-Butylperoxy)-2-methylpropane Ethane Ethanoic acid Ethylic acid Glacial acetic acid Methanecarboxylic acid Vinegar acid Ethanol Absolute alcohol Anhydrous ethanol Ethyl hydroxide Ethyl hydrate 1-Hydroxyethane Methylcarbinol Ethene Acetene Ethenylbenzene Cinnamene Phenethylene Phenylethene Phenylethylene Vinylbenzene Ethoxy ethane Anaesthetic ether Diethyl ether 1,1'-Oxybisethane Ethyl acetate Ethyl alcohol Ethyl benzene Ethyl ether Ethylcyclohexane Ethylene Ethylene glycol monoethyl ether acetate 2-Ethoxyethanol acetate Ethylglycol acetate EGEEA Ethylene glycol ethyl ether acetate Oxitol acetate Ethyl cellosolve acetate Ethylene glycol Ethylene alcohol Glycol Monoethylene glycol 1,2-Dihydroxyethane 2-Hydroxyethanol Ethylhexanol 2-Ethylhexanol 2-Ethylhexyl alcohol 2-EH Octyl alcohol Furfural H2O HEA 2-hydroxyethylester Acrylic acid 2-(Acryloyloxy)ethanol Diethylene glycol monoacrylate 2-Hydroxyethyl-2-propenoate Hemimellitene Heptane Hexane Hexanon Pimelic ketone Ketohexamethylene Anon Hytrol O Hexylene Glycol α,α,α'-Trimethyltrimethylene glycol 1,1,3-Trimethyltrimethylenediol 2,4-Dihydroxy-2-methylpent iso-Pentane 1,1,2-Trimethylethane Ethyldimethylmethane Isoamylhydride 1,1-dimethylpropane Isobutanol Isobutyl acetate Isobutylene Isobutylmethylcarbinol Isobutylmethylmethanol Methylisobutylcarbinol Methyl amyl alcohol 1,3-Dimethylbutanol Isobutyraldehyde Isobutanal Isopropylformaldehyde α-Methylpropionaldehyde Isopropylaldehyde Isobutyric aldehyde 2-Methyl-1-propanal Isohexane Methyl pentane Isopropyl acetate Isopropyl alcohol Isopropyl ethanoate Acetic acid isopropyl ester Acetic acid 1-methylethyl ester 2-Acetoxypropane Isopropyl ether 2-Isopropoxypropane 1,1-Dimethyldiethyl ether 2,2'-Oxybispropane MAM Methacrylic acid methyl ester Methyl 2-methyl-2-propenoate Methyl-α-methacrylate Ester méthylique de l'acide méthacrylique MEC MEK Methyl ethyl cetone Mesitylene Methane Methanol Methoxy-1 propanol Propylene glycol methyl ether 2PG1ME PGME α-Propylene glycol monomethyl ether 1-Methoxy-2-hydroxypropane 2-Methoxy-1-methylethanol Monopropylene glycol methyl ether Methoxypropoxy propanol (mixed isomers) Methyl 2 pentane Methyl acetate Methyl alcohol Methyl ethanoate Methyl acetic ester Acetic acid methyl ester Methyl isobutyl ketone Methyl methacrylate Methylbenzene Methylene chloride Methylmethane Monochlorobenzene MCB Phenyl Chloride Benzene chloride Chlorbenzene Chlorobenzol N,N-diethylethanamine (Diethylamino)ethane TEN N,N-Dimethylcyclohexanamine Cyclohexyldimethylamine DMCHA N,N-Dimethylaminocyclohexane N,N-dimethylcyclohexylamine N,N-Dimethylformamide n-Butane n-Butanol Butyl alcohol n-Butan-1-ol n-Butyl alcohol Methylolpropane Propylcarbinol 1-Hydroxybutane n-Butyl acetate Butyl ester acetic acid Butyl ethanoate 1-Butyl acetate Acetic acid n-butyl ester n-Butyl ethyl ketone Butyl ethyl ketone Ethyl butyl ketone Heptan-3-one n-Butyl methacrylate Butyl 2-methyl-2-propenoate Methacrylic acid n-butyl ester 2-Methyl-2-propenoic acid butyl ester BMA n-Butylbenzene 1-Phenylbutane 1-butylbenzene n-Decane n-Dodecane n-Heptane n-Hexane N-Methyl-pyrrolidone n-Octane n-Pentane n-Pentyl acetate Amyl acetate n-Amyl acetate Amyl acetic ester Amyl acetic ether 1-Pentanol acetate Acetic acid pentyl ester Acetic acid n-amyl ester n-Pentyl ethanoate n-Propane Dimethylmethane n-Propyl acetate 1-Propyl acetate 1-Acetoxypropane Acetic acid n-propyl ester n-Propyl ethanoate n-Propylbenzene Isocumene 1-Phenylpropane Propylbenzol NMP N-Methyl-α-pyrrolidinone 1-Methyl- 2-pyrrolidinone 1-Methyl-2-pyrrolidone 1-Methyl-5-pyrrolidinone 1-Methylazacyclopentane-2-one M-Pyrol Octane Pentane Pentyl acetate Petroleum naphtha heavy aromatic 150 Petroleum naphtha light aromatic 100 Propane Propanedioic acid diethyl ester Carbethoxyacetic ester Dicarbethoxymethane Malonic acid diethyl ester Dicarbethoxymethane Diethyl propanedioate Propanol 1-Propanol n-Propan-1-ol; n-Propanol n-Propyl alcohol Ethylcarbinol Propylic alcohol 1-Hydroxypropane Propanol-1 Propene Methylethylene Methylethene Propyl acetate Propyl alcohol Propylbenzene Propylene Propylene carbonate Propylene Glycol Monoethyl Ether Propylene glycol ethyl ether PGEE 1-Ethoxy-2-hydroxypropane 2-Ethoxy-1-methylethanol 1-Ethoxypropan-2-ol Propylene glycol 1-ethyl ether 2PG1EE Pseudocumene Pseudohexyl alcohol 2-Ethylbutyl alcohol 3-Methylolpentane sec-Hexyl alcohol sec-Pentyl carbinol 3-Pentyl carbinol Pyridine s-Diisopropylacetone DIBK 2,6-Dimethyl-4-heptanone Isovalerone sec-Butyl acetate sec-Butyl alcohol acetate 1-Methylpropyl ester acetic acid 2-Butoxy ester acetic acid dl-sec-Butyl acetate sec-Butyl ethanoate 1-Methylpropyl acetate sec-Butyl alcohol sec-Butanol Ethyl Methyl carbinol 1-Methyl-1-propanol Styrene TEP Ethyl phosphate o-Phosphoric acid triethyl ester Phosphoric ether Terpineol tert-Amyl Alcohol tert-Pentanol Dimethyl ethyl carbinol 1,1-Dimethyl-1-propanol tert-Butyl methyl ether Methyl tert-butyl ether MTBE 2-Methyl-2-methoxypropane Methyl 1,1-dimethylethyl ether Tétrahydrofurane THF Toluene Trans-1,2-Dimethylcyclohexane Trans-Bicyclo[4.4.0]decane trans-Decalin trans-Perhydronaphthalene Trans-Decahydronaphthalene Trichloromethane Freon 20 R20 Formyl trichloride Methane trichloride Methenyl trichloride Methyl trichloride Chloroforme Triethyl phosphate Triethylamine Triethylene glycol dimethyl ether 1,2-bis(2-methoxyethoxy)ethane Triglyme TEGDME Vinyl acetate Water Xylene (mixed isomers) Xylene m Xylene o Xylene p