Product of Semi-Dry Absorption method of Flue Gas Desulphurization (SDA Product)

Particle size distribution (Granulometry)

Link to relevant study record(s)

Reference

Endpoint:

particle size distribution (granulometry)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

05.10.2009

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

test procedure in accordance with generally accepted scientific standards and described in sufficient detail

Qualifier:

according to guideline

Guideline:

ISO 13320 (Particle size analysis - Laser diffraction methods)

Version / remarks:

Part 1: General principles, First edition 1999-11-01

Deviations:

no

GLP compliance:

yes

Type of method:

Laser scattering/diffraction

Type of particle tested:

primary particle

Type of distribution:

volumetric distribution

Key result

Percentile:

D50

Mean:

17.43 µm

St. dev.:

0.22

Percentile:

D90

Mean:

< 29.14 µm

St. dev.:

0.36

Percentile:

D10

Mean:

< 10.12 µm

St. dev.:

0.24

Table No. 1 Results of determination of particle size distribution

Determination	Median (µm)	Diameter on Cumulative 90% (µm)	Diameter on Cumulative 10% (µm)	Span (-)
1	17.43	29.14	10.12	1.09
2	17.83	29.68	10.44	1.08
3	17.60	29.84	10.15	1.12
4	17.28	29.18	9.75	1.12
5	17.22	28.90	9.91	1.10
6	17.56	29.16	10.26	1.08
Average	17.49	29.32	10.10	1.10
Standard deviation	0.22	0.36	0.24	0.02
Extended uncertainty	0.45	0.72	0.49	-

The value nearest to average is used as final result of the test. That is the 1^stmeasurement.

Detailed results of this measurement are stated at the Appendix 1.

Criteria of quality

The test satisfied quality criteria as follows:

The individual results of median from single testing should not vary more than 10 % from the average. For our measurements the calculated critical range is 15.74 to 19.24 µm.

We performed 6 measurements and the individual values fall within the range of quality criterion (actual range is 17.22 to 17.83).

The criterion of quality was met.

Conclusions:

See Executive Summary

Executive summary:

The determination of the particle size distribution of the test substance, Semi Dry Absorption (SDA) Product, was determined. The laser diffraction method was used.

Test was performed according to the standard ISO 13320-1 Particle size analysis – Laser diffraction methods – Part 1: General principles, First edition 1999-11-01.

The recommendations of Guidance Document on the Determination of Particle Size Distribution, Fibre Length and Diameter Distribution of Chemical Substances, EUR 20268 EN (2002) were considered.

Particle size distribution of the test substance Semi Dry Absorption (SDA) Product, is characterized by the following table:

Determination	Median (µm)	Diameter on Cumulative 90% (µm)	Diameter on Cumulative 10% (µm)	Span (-)
Final result	17.43	29.14	10.12	1.09
Extended uncertainty	0.45	0.72	0.49	-

Description of key information

The particle size distribution of the test substance was determined according to the standard ISO 13320-1 Particle size analysis – Laser diffraction methods.

Median: 17.43 um (ext. uncertainty 0.45)