Biochar Technical Specifications
Physical & Chemical Properties
Elemental analysis
Table 1. Elemental composition of AR-B sample
| EWS As-Received Biochar | C(wt.%) | O(wt.%) | H(wt.%) | N(wt.%) | H/C | O/C |
|---|---|---|---|---|---|---|
| 1st Trial | 81.00 | 11.82 | 3.11 | 0.40 | 0.038 | 0.15 |
| 2nd Trial | 80.12 | 11.50 | 3.11 | 0.41 | 0.039 | 0.14 |
BET Surface area and porosity
Table 2. Surface area and porosity of AR-B sample
| Sample | BET Surface Area (m2 g-1) | TOtal Pore Volume (cm3 g-1) | Average Pore Width (nm) |
|---|---|---|---|
| AR-B - Run 1 | 57.26 | 0.035 | 2.2 |
| AR-B - Run 2 | 88.65 | 0.046 | 2.1 |
| AR-B - Run 3 | 80.12 | 0.039 | 2.2 |
Table 3. Instrument precision tested by repeating the AR-B Run 1 sample
| Sample | BET Surface Area (m2 g-1) | TOtal Pore Volume (cm3 g-1) | Average Pore Width (nm) |
|---|---|---|---|
| AR-B - Run 1 | 57.26 | 0.032 | 2.2 |
| AR-B - Run 1 Repeat 1 | 55.54 | 0.030 | 2.2 |
| AR-B - Run 1 Repeat 2 | 70.04 | 0.036 | 2.0 |
| AR-B - Run 1 Repeat 3 | 64.44 | 0.033 | 2.1 |
ENGAGE Project Phase 1 Report: Biochar Characterization
by: Amir M Dehkhoda - March 2017
| Sample | (Surface area) S BET (m2/g) | S micro (m2/g) | S meso (m2/g) | V 0.97 (cm3/g) | V u (cm3/g) | V meso (cm3/g) | Ash | Carbon |
|---|---|---|---|---|---|---|---|---|
| Gray Pine with Bark | 413 | 323 | 90 | 0.18 | 0.12 | 0.06 | 1.11-1.27% | 80.2% |
| Spruce without Bark | 502 | 423 | 79 | 0.21 | 0.16 | 0.05 | 0.991% | 83.8% |
| Alcarbon IC-60 (Commercial Activated Carbon) | 1109 | 963 | 146 | 0.45 | 0.37 | 0.08 | ||
| Standard Silica Alumina Measured | 199 | 0 | 199 | 0.61 | 0.00 | 0.61 | ||
| Standard Silica Alumina | 210±21 | 0 | 210±21 | 0.62±0.08 | 0.00 | 0.62±0.08 |
Summary of Analytical Results of EWS Carbon Samples
EWS Biochar (received on October 21, 2016)
| Parameter | Result | Method |
|---|---|---|
| Carbon Content on a dry basis | 81.61%±0.044% at 95% confidence | ASTM E777 Standard Test Method for Carbon and Hydrogen in the Analysis Sample of Refuse-Derived fuel |
| Ash Content | 2.70%±0.756% at 95% confidence | ASTM D2866 Standard Test Method for Total Ash Content of Activated Carbon |
| pH | 8.55 at a biochar-to-water ratio of 1:4.6 | Saturated media extract method |
Note: Thew EWS sample was ground and dried in air to 103ºC to constant weight. A subsample was taken for the lab analyses. This sample preparation was based on in-house method modified based on ASTM E829.