zinc sulfide production, UPR, ecoinvent 3.6, Undefined

Categories:
ISIC4 categories:
C:Manufacturing/20:Manufacture of chemicals and chemical products/201:Manufacture of basic chemicals, fertilizers and nitrogen compounds, plastics and synthetic rubber in primary forms/2011:Manufacture of basic chemicals
Location:
GLO - Global
Reference year: 2005 - 2020
Description

Location: GLO - Global
This dataset represents the production of 1 kg of solid zinc sulfide powder. Zinc sulfide (ZnS) is a white to yellow coloured powder or crystal. Zinc sulfide can be used as a pigment (sachtolith), mainly in plastics and paints. With addition of a few ppm of a suitable activator, ZnS is also used as a phosphor in many applications, from cathode ray tubes through x-ray screens to glow-in-the-dark products. Copper doped zinc sulfide (ZnS:Cu) is used in electroluminescent panels. Zinc sulfide is also used as an infrared optical material, transmitting from visible wavelengths to over 12 micrometres.
In this dataset, the raw material inputs are calculated according to stoichiometry and the emissions to air and water are estimated using mass balance. Therefore, this dataset represents an estimation of the production process and should be used only for processes where the impact of zinc sulfide is not considered to be high. The energy and water values are approximated based on data from a large chemical plant (Gendorf 2016).
References:
Hischier R., Classen M., Lehmann M. and Scharnhorst W. (2007) Life cycle inventories of Electric and Electronic Equipment: Production, Use and Disposal. ecoinvent report No. 18. Empa / Technology & Society Lab, Swiss Centre for Life Cycle Inventories, Dübendorf, 2007.
Gendorf (2016) Umwelterklärung 2015, Werk Gendorf Industriepark, www.gendorf.de.
Undefined unit processes (UPRs) are the unlinked, multi-product activity datasets that form the basis for all of the system models available in the ecoinvent database. This is the way the datasets are obtained and entered into the database by the data providers. These activity datasets are useful for investigating the environmental impacts of a specific activity (gate-to-gate), without regard to its upstream or downstream impacts.

Technology

Production from zinc monosulfate and sodium sulfide, assuming a yield of 100%. Zinc sulphide is produced by precipitation out of a solution according to the following stoechiometric equation:
ZnSO4.H2O + Na2S -> ZnS + Na2SO4 + H2O

Process type
Unit
Supported nomenclature
ecoinvent 3.6
LCI modeling approach
Before modeling
Multifunctional modeling
NONE
Format
ECOSPOLD2
Aggregation type
NOT_APPLICABLE
Data provider
ecoinvent
Review status
External
Cost
For sale
License

ecoinvent EULA

Contact
support@ecoinvent.org