Rice Husk Pyrolysis to Biochar Test Reports

Recently, Beston Group completed a rice husk–to–biochar pyrolysis solution for a Southeast Asian client using BST-50S biochar production equipment. Based on the client’s specific application requirements, the project was supported by a series of controlled tests. These tests were carried out at Beston Group’s laboratory and pilot-scale facilities, with iterative process optimizations applied throughout the project. The following test data were generated under defined operating conditions. They reflect practical production scenarios and verified testing procedures, and are provided for technical evaluation and reference.

Rice Husk Raw Material Information

Test of Customer Sample in Laboratory on 2025-05

To evaluate the pyrolysis behavior of customer-supplied rice husk under controlled conditions. Our laboratory team first conducted small-batch tests at different temperatures and reaction times.

Test of Procured Samples on Prototype on 2025-06-23

To establish baseline performance data, Beston Group conducted pilot-scale tests using domestically sourced rice husk at different operating temperatures.

Rice Husk Biochar Testing Results and Analysis on 2025-08-06

To compare with the client’s rice husk sample, we first sent the biochar produced from domestically sourced rice husk samples for testing on August 6, 2025, and obtained the H/C molar ratio data.

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Test of Customer Samples on Prototype on 2025-08-16

To verify equipment performance under practical operating conditions, Beston Group conducted pilot-scale tests using customer-supplied rice husk at different temperatures and residence times.

Rice Husk Biochar Testing Results and Analysis on 2025-11-07

To ensure the accuracy of the data, we sent the biochar samples produced under different operating conditions to a testing agency for analysis. The dry basis carbon content (Cd) and dry basis hydrogen content (Hd) were measured. The test results were provided by the ICAS monitoring agency, with the monitoring conducted on November 7, 2025. Based on the hydrogen-carbon ratio formula (H/C ratio = Total hydrogen / (Total carbon – Inorganic carbon) * 12), we further calculated the hydrogen-carbon molar ratio.
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Experimental Conclusions

• Higher Biochar Yield in Laboratory Settings:
  The biochar yield in laboratory tests is higher than that observed in prototype machine testing.
• Correlation Between Temperature and Fixed Carbon:
  For rice husks, an increase in reaction temperature does not necessarily result in a higher fixed carbon content.
• Variability Based on Material Variety:
  Different varieties of the same raw material yield biochar of varying quality.
• H/C Molar Ratio Compliance:
  After multiple tests, the final hydrogen-to-carbon (H/C) molar ratios are consistently below 0.7, meeting the requirements for carbon removal projects.