I do not understand clearly what is the chemical formula of the reference flow,
If compare the GWP of the "market for soda ash, dense" with
one kg of soda ash light crys.. GWP
one kg of soda ash dense GWP
Nor the water content or the transport could reasonably explain the big difference between this two modules.
could you help me to choose the good dataset for glass making
Hello,
“Soda ash, dense” and “soda ash, light, crystalline” are produced via 2 different methods. While the former one is produced by the “modified Solvay process, Hou's process” the latter one is produced by “soda production, solvay process”.
You can check undefined unit processes (i.e. before linking and allocation) yourself by accessing the data in ecoQuery (ecoinvent database online). If you have a license please read here, if not you can create a guest user account to access. By looking at the datasets in ecoQuery, you can read the documentation of the datasets where you find information on the 2 production methods. Moreover, when accessing V2 of ecoQuery, you can also download the following reports (under the “reports” section) which provide further information on the 2 production methods:
I hope this answers you question. Kind regards,
Nora Minas, Junior Data Analyst, ecoinvent Association