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With the acceptance of the new European Union wood pellets standard (EN
14961-2) in 2010, new certificates, ENplus for pellets used in boilers for
domestic purposes and EN-B for industrial pellets used in industrial boilers,
are introduced. The standard ENplus defines two quality categories: A1 and
A2. In category A1 are implemented the most strict limits for ash content in
the pellets. In category A2 the ash content is up to 1,5%. For industrial
pellets the EN-B certificate is applied, which is with significantly decreased
quality requirements.
Parameters
Dimension
ENplus-A1
ENplus-A2
Diameter
mm
6 (± 1)
6 (± 1)
Length
mm
3,15
≤
L
≤
40
1)
3,15
≤
L
≤
40
1)
Bulk Density
kg/m³
≥
600
≥
600
Caloricity
MJ/kg
≥
16.5
≥
16.5
Water content
%
≤
10
≤
10
Dust
%
≤
1
3)
≤
1
3)
Mechanical durability
%
≥
97.5
4)
≥
97.5
4)
Ash content
%
2)
≤
0,7
≤
1.5
Ash melting point
°C
≥
1200
≥
1100
Chlorine content
%
2)
≤
0.02
≤
0.03
Sulfur content
%
2)
≤
0.05
≤
0.05
Nitrogen content
%
2)
≤
0.3
≤
0.5
Copper content
mg/kg
2)
≤
10
≤
10
Chromium content
mg/kg
2)
≤
10
≤
10
Arsenic content
mg/kg
2)
≤
1
≤
1
Cadmium content
mg/kg
2)
≤
0.5
≤
0.5
Mercury content
mg/kg
2)
≤
0.1
≤
0.1
Lead content
mg/kg
2)
≤
10
≤
10
Nickel content
mg/kg
2)
≤
10
≤
10
Zink content
mg/kg
2)
≤
100
≤
100
1) no more than 1% from the pellets can be longer than 40 mm, maximum length of 45 mm;
2) the data are determined with dry mass;
3) particles <3.15 mm, fine particles, before deliver of the goods;
4) for measurements, performed with Lignotester maximum allowed value
≥
97.7 mass %;
Table 2.6. European standard for wood pellets ENplus.
