// Характеристики биочара — Биочар

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Характеристики биочара

Химический состав и
физические свойства биочара

В целом биочар содержит (по массе)70-80% чистого углерода, золу (3-10%), летучие углеводороды (10-25%).Влажность биочара  — обычно 10-20 %.

Результаты некоторых тестов от нашей лаборатории приведены далее.

Manufacturer: Metakom limited Products: biochar granulation, fraction 0-6 mm.

Physical properties RBC
Bulk Density (g/cm3) 0.27
Particles Density (g/cm3) 0.59
Free volume (cm3/cm3) 0.54
Fractions (>0.5mm, g/cm3) 0.89
Surface Area (m2/g) 325
u-Pores Volume (cm3/cm3) 0.02
m-Pores Volume (cm3/cm3) 0.04
M-Pores Volume (cm3/cm3) 0.30
Total Pores Volume (cm3/cm3) 0.37
Solids (cm3/cm3) 0.09
Impregnation Capacity (cm3/cm3) 0.38
Chemical properties RBC
pH 7.1
Water (wt%) 3
VOCs (wt%) 18
Fixed C (wt%) 75
Ash (wt%) 4

Газовая хромотограмма:

Микрофото:

Table 1: Test Category A:

Test Category A: Basic Biochar Utility Properties - Required for All Biochars
Requirement Criteria Real Unit Test Method
Moisture Declaration 6,3 % of total mass, dry basis ASTM D1762-84 (specify measurement date with respect to time from production)
Organic Carbon Class 1: ≥60% Class 2: ≥30% and Class 1, 78% % of total mass, dry basis C, H, N analysis by dry combustion (Dumas method), before (total C) and after (organic C) HCl addition
H:Corg 0.7 (Maximum) 0,05 Molar ratio C, H, N analysis by dry combustion (Dumas method), before (total C) and after (organic C) HCl addition
Total Ash Declaration 6,5 % of total mass, dry basis ASTM D1762-84
pH Declaration 8,61 pH pH analysis procedures as outlined in section 04.11 of US Composting Counciland US Department of Agriculture (2001), following dilution and sample equilibration methods from Rajkovich et al.(2011) See Appendix 2

Table 2: Test Category B:

Test Category B: Biochar Toxicant Reporting - Required for All Feedstocks
Requirement Range of Maximum Allowed Thresholds Real Test Method
Earthworm Avoidance Test Pass/Fail Pass ISO 17512-1:2008 methodology and OECD methodology (1984a) as described by Van Zwieten et al. (2010), see Appendix 3
Germination Inhibition Assay Pass/Fail Pass OECD methodology (1984b) 3 test species, as described by Van Zwieten et al. (2010), see Appendix 3
Germination Inhibition Assay Pass/Fail 8 Method following US Environmental Protection Agency (1996)
Polychlorinated Biphenyls 0,2-0,5 mg/kg ITEQ 0,2 Method following US Environmental Protection Agency (1996)
Polychlorinated Biphenyls 0,2-0,5 mg/kg ITEQ 0,2 Method following US Environmental Protection Agency (1996)
Polychlorinated Biphenyls 0,2-0,5 mg/kg ITEQ 0,2 Method following US Environmental Protection Agency (1996)
Polychlorinated Biphenyls 0,2-0,5 mg/kg ITEQ 0,2 Method following US Environmental Protection Agency (1996)

Table 3: Test Category C:

Test Category C: Biochar Advanced Analysis and Soil Enhancement Properties - Optional for All Biochars
Requirement Criteria Real Unit Modified dry ashing followed by ICP (Enders and Lehmann 2012)
Total Phosphorus & Potassium (P&K) Declaration % of total mass, dry basis 0,034 Modified dry ashing followed by ICP (Enders and Lehmann 2012)
Volatile Matter Declaration % of total mass, dry basis 0,034 ASTM D1762-84
Total Surface Area Declaration m2/g 0,034 ASTM D 6556-10 Standard Test Method for Carbon Black – Total and External Surface Area by Nitrogen Adsorption. See Appendix 4.
PV Declaration cm3/g % of total mass, dry basis ASTM D 6556-10 Standard Test Method for Carbon Black – Total and External Surface Area by Nitrogen Adsorption. See Appendix 4.
PSA Declaration m2/g 0,034 ASTM D 6556-10 Standard Test Method for Carbon Black – Total and External Surface Area by Nitrogen Adsorption. See Appendix 4.
PV/PSA Declaration m2/g 0,034 ASTM D 6556-10 Standard Test Method for Carbon Black – Total and External Surface Area by Nitrogen Adsorption. See Appendix 4.

Насыпная плотность при транспортировке около 300 кг/м.куб.




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