The byproduct “bio-char” produced by the pyrolysis process was characterized to investigate the properties and its appropriateness for energy application. The pyrolysis reaction was carried out at 300, 350, 400, and 450 °C and 1-h reaction holding time. The analytical techniques TGA/DTG, FT-IR, XRD, SEM, CHNS, and BET were used for the characterization of the different bio-char properties. Results showed that the carbon content in rice straw bio-char increased from 42.20 to 45.33%, with increasing pyrolysis temperatures from 300 to 450 °C. CHNS, XRD, FT-IR, and TGA analysis showed that the bio-char aromatic structure was rich in carbon and it demonstrated higher bio-char carbon stability at 450 °C. With increase in temperature from 300 to 450 °C, the specific surface area of the bio-chars was enhanced (1.17 to 6.60 m²/g). At higher temperatures, biomass macromolecules decomposed completely and bio-char became more porous in nature with voids created within the bio-char matrix. During the pyrolysis of the rice straw biomass, the sharp peaks of the crystalline structure were destroyed and less intensity broader peak appeared in the pyrolysis derived bio-chars. The atomic ratio of H/C and O/C decreased with increase in pyrolysis temperature from 300 to 450 °C. These low values indicate that the reaction temperature promoted the loss of oxygen and hydrogen.

对热解过程产生的副产品“生物炭”进行了表征，以研究其性质及其对能源应用的适用性。热解反应在 300、350、400 和 450 °C 和 1 小时的反应保持时间下进行。分析技术 TGA/DTG、FT-IR、XRD、SEM、CHNS 和 BET 用于表征不同的生物炭性质。结果表明，随着热解温度从300℃增加到450℃，稻草生物炭的碳含量从42.20%增加到45.33%。CHNS、XRD、FT-IR和TGA分析表明，生物炭芳烃结构富含碳，在450 ℃下表现出更高的生物炭碳稳定性。随着温度从 300 升高到 450 ℃，生物炭的比表面积增加（1.17 到 6.60 m ²/G）。在较高温度下，生物质大分子完全分解，生物炭在自然界中变得更加多孔，在生物炭基质内产生空隙。在稻草生物质热解过程中，晶体结构的尖峰被破坏，热解衍生的生物炭出现强度较弱的较宽峰。H / C和O / C的原子比随着热解温度从300到450°C的增加而降低。这些低值表明反应温度促进了氧和氢的损失。