ISO 21626-1:2020
(Main)Bamboo charcoal — Part 1: Generalities
Bamboo charcoal — Part 1: Generalities
This document specifies the requirements and test methods for bamboo charcoal. It is applicable to the bamboo charcoal briquette.
Charbon de bambou — Partie 1: Généralités
General Information
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 21626-1
First edition
2020-12
Bamboo charcoal —
Part 1:
Generalities
Charbon de bambou —
Partie 1: Généralités
Reference number
©
ISO 2020
© ISO 2020
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ii © ISO 2020 – All rights reserved
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification . 2
5 Requirements . 3
5.1 Sensory inspection . 3
5.2 Methods of measuring bamboo charcoal particle size . 3
5.3 Requirements of physical and chemical properties for bamboo charcoal . 3
6 Sampling . 4
7 Analytical methods. 4
7.1 Visual inspection procedure . 4
7.2 Determination of moisture content . 4
7.3 Determination of ash content. 4
7.4 Determination of fixed carbon . 4
8 Marking and labelling . 5
9 Packaging, transport and storage . 5
Annex A (informative) Packaging, transport and storage . 6
Bibliography . 7
Foreword
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This document is prepared by Technical Committee ISO/TC 296, Bamboo and Rattan.
Any feedback or questions on this document should be directed to the user’s national standards body. A
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iv © ISO 2020 – All rights reserved
Introduction
The use of bamboo for charcoal provides an effective means of improving the utilization of bamboo.
Bamboo charcoal can be produced by a wide variety of traditional methods and modern technology.
With the increase in the use of charcoal for household and industrial purposes, the need has arisen for
specifications that establish a standard for classification and testing.
INTERNATIONAL STANDARD ISO 21626-1:2020(E)
Bamboo charcoal —
Part 1:
Generalities
1 Scope
This document specifies the requirements and test methods for bamboo charcoal. It is applicable to the
bamboo charcoal briquette.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 1953, Hard coal — Size analysis by sieving
ISO 18122, Solid biofuels — Determination of ash content
ISO 18123, Solid biofuels — Determination of the content of volatile matter
ISO 18134-3, Solid biofuels — Determination of moisture content — Oven dry method — Part 3: Moisture
in general analysis sample
ISO 18135, Solid biofuels — Sampling
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
bamboo charcoal
BC
black solid porous product made of carbonized bamboo
3.2
bamboo charcoal briquette
BCB
shaped, solid product of carbonized bamboo particles or charcoal made by compression or extrusion
with or without a binder
3.3
tubular bamboo charcoal
TBC
bamboo charcoal (3.1) made of carbonized bamboo culm
3.4
bamboo charcoal flakes
BCF
flat, thin pieces of bamboo charcoal (3.1)
3.5
bamboo charcoal granules
BCG
minute quantity or fragment of bamboo charcoal (3.1)
3.6
bamboo charcoal powder
BCP
milled or pulverized charcoal with a typical particle size less than 1 mm
3.7
moisture content
MC
water in the fuel removable under specific conditions
3.8
ash content
AC
mass of inorganic residue remaining after combustion of bamboo charcoal (3.1) under specified
conditions, typically expressed as a percentage of the mass of dry matter in fuel
3.9
fixed carbon
FC
remaining carbon after removal of water, ash and volatile matter
4 Classification
Bamboo charcoal could be classified into traditional bamboo charcoal and bamboo charcoal briquette,
and the latter can be further subdivided into carbonized bamboo powder briquette (CBPB) and
compressed bamboo charcoal powder briquette (BCPB), respectively, according to the production
process.
NOTE 1 Bamboo charcoal briquettes can be produced through processes:
a) Carbonization of bamboo powder briquette, and
b) Compression of bamboo charcoal powder.
NOTE 2 The raw material for process a) can be compressed bamboo powder with or without other biomass
powder blends and mixtures.
NOTE 3 The raw material for process b) can be bamboo charcoal powder with or without other fuel blends
and mixtures.
2 © ISO 2020 – All rights reserved
Table 1 — Bamboo charcoal classification according to shape and size
a b b
C(s1) TBC BCF BCG BCP
I II III
C(s2) (30 to 50)
L > D 1 to 3 3 to 10 10 to 20 ≤1
mm (50 to 100)
Key
C(s1) = Classification according to shape
C(s2) = Classification according to size
TBC = Tubular bamboo charcoal
L = Length
D = Diameter
BCF = Bamboo charcoal flakes
BCG = Bamboo charcoal granules
BCP = Bamboo charcoal powder
NOTE This table illustrates the classification of bamboo charcoal.
a
Size (width × length) of (30 to 50) × (50 to 100) is mostly applied in current international trade. Size of bamboo charcoal
flakes can also be provided in other specification upon request by supplier and purchaser.
b
BCP grade is decided by the size of the majority (80% and above) of the granules,
i.e. minimum 80 % of bamboo charcoal granules with the size of 2 mm to 4 mm can be regarded as Grade II, otherwise, re-
grading or reprocessing is required to reach the corresponding grade. See ISO 1953.
5 Requirements
5.1 Sensory inspection
The product shall appear black with no peculiar smell, contaminant and foreign matter.
5.2 Methods of measuring bamboo charcoal particle size
The bamboo charcoal particle size shall be measured in accordance with ISO 1953.
5.3 Requirements of physical and chemical properties for bamboo charcoal
Table 2 — Requirements for physical and chemical properties of bamboo charcoal
Item Requirements
Bamboo charcoal Bamboo charcoal briquette
Grading I II III I II III
MC
≤9,00 ≤12,00 ≤12,00 ≤9,00 ≤12,00 ≤12,00
%
Key
BC = Bamboo charcoal
BCB = Bamboo charcoal briquette
MC = Moisture content
AC = Ash content
FC = Fixed carbon
NOTE The physical and chemical properties of bamboo charcoal can be tested to comply with all the requirements
specified in this table.
Table 2 (continued)
Item Requirements
Bamboo charcoal Bamboo charcoal briquette
Grading I II III I II III
AC
≤4,50 ≤6,50 ≤8,50 ≤4,50 ≤7,50 ≤10,50
%
FC
≥85,00 ≥75,00 ≥65,00 ≥85,00 ≥75,00 ≥65,00
%
Key
BC = Bamboo charcoal
BCB = Bamboo charcoal briquette
MC = Moisture content
AC = Ash content
FC = Fixed carbon
NOTE The physical and chemical properties of bamboo charcoal can be tested to comply with all the requirements
specified in this table.
6 Sampling
Sampling of bamboo charcoal shall be in accordance with ISO 18135. The sample for analysis shall be
randomly chosen from a lot of bulk products with a minimum weight of no less than 1,0 kg.
7 Analytical methods
7.1 Visual inspection procedure
Put 0,1 kg of bamboo charcoal on a white piece of paper, then observe and decide the sample by sense
of sight.
7.2 Determination of moisture content
Moisture content shall be determined in accordance with ISO 18134-3.
7.3 Determination of ash content
Ash content shall be determined in accordance with ISO 18122.
7.4 Determination of fixed carbon
Fixed carbon is the remaining carbon after removal of moisture, ash, and volatile matter from the dry
bamboo charcoal or briquette, expressed in percentages.
Fixed carbon shall be calculated in compliance with Formula (1):
C = 100 % - (A+V) (1)
where
4 © ISO 2020 – All rights reserved
C is fixed carbon expressed in percentages;
A is ash content expressed in percentages;
V is volatile matter expressed in percentages.
The volatile matter shall be determined in accordance with ISO 18123. All results shall be calculated to
two decimal places and the mean value shall be rounded to the nearest 0,01 % for reporting.
8 Marking and labelling
8.1 The following information shall appear on the face of the containers:
a) name and address of the manufacturer;
b) executive standard;
c) the date of production and batch identification;
d) the net mass; and
e) grade of the bamboo charcoal
8.2 A product’s use instructions shall be printed on the back of conta
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