Abstract Pruned wolfberry branches are abundant and ideal raw material for biomass carbonization. It would provide valuable guidance for optimizing the preparation conditions of biochar of pruned wolfberry branches for carbon sequestration and emission reduction. This study adopted a single-factor experiment and response surface method (RSM) using reaction temperature and holding time as factors, and systematically investigated the effects of carbonization conditions on yield and fixed carbon content. Based on the results, the effects of temperature on yield and fixed carbon content were greater than those of holding time. Both temperature and holding time had extremely significant effects on yield, and the interaction had significant effects. Temperature had an extremely significant effect on fixed carbon content, while holding time and the interaction had no significant effect. Through the RSM, the optimized pyrolysis temperature was 530°C and the holding time was 2 h. The potential for carbon sequestration of biochar generated by wolfberry branches and returned to the soil was evaluated. Biochar was believed to contribute to carbon sequestration and emission reduction in Qinghai province; 68.56 × 103 t of carbon emissions could be reduced annually from combustion in the atmosphere and 34.42 × 103 t of carbon could be fixed if all biochar were applied to soil.

中文翻译：

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枸杞剪枝生物炭制备工艺优化及固碳效果

摘要 修剪后的枸杞枝是丰富的生物质炭化的理想原料。对优化枸杞剪枝生物炭制备条件进行固碳减排具有重要指导意义。本研究采用单因素实验和响应面法（RSM），以反应温度和保温时间为因素，系统考察了碳化条件对收率和固定碳含量的影响。结果表明，温度对收率和固定碳含量的影响大于保温时间。温度和保温时间对产量的影响都非常显着，而且交互作用也有显着的影响。温度对固定碳含量有极其显着的影响，而保持时间和交互作用没有显着影响。通过RSM，优化的热解温度为530°C，保温时间为2 h。对枸杞枝产生并返回土壤的生物炭进行碳封存的潜力进行了评估。生物质炭被认为有助于青海省的碳封存和减排；如果将所有生物炭应用于土壤，每年可减少 68.56 × 103 t 的大气燃烧碳排放，可固定 34.42 × 103 t 的碳。生物质炭被认为有助于青海省的碳封存和减排；如果将所有生物炭应用于土壤，每年可减少 68.56 × 103 t 的大气燃烧碳排放，可固定 34.42 × 103 t 的碳。生物质炭被认为有助于青海省的碳封存和减排；如果将所有生物炭应用于土壤，每年可减少 68.56 × 103 t 的大气燃烧碳排放，可固定 34.42 × 103 t 的碳。