Scholarlink

<p>Alternative reactor designs to improve thermal efficiency and product quality of intra-carbonization of sawdust were evaluated. Configurations tested include a cylindrical reactor with an internal combustion chamber, a conical reactor with both internal and external combustion chambers with varying feedstock packing regimes. Results indicate that reactor geometry and air/fuel dynamics critically affect conversion rate, carbon yield, and char quality. The best conversion of ~ 95% and a yield of 46% was achieved using a stratified conical reactor + combustion chamber (SCCC) where there was quick and uniform heat transfer in 8&#xa0;h. Conical reactor systems using an external combustion chamber had very low conversions and yields, particularly in mixed feedstock scenarios compared to stratified, due to reduced aeration for the latter. The conical reactor with internal combustion chamber (both SCCC and OCCC) achieved faster carbonization, reaching over 90% conversion in 8–10&#xa0;h. The two also had the best quality of charred biomass of between 23.33&#xa0;MJ/kg and 23.41&#xa0;MJ/kg gross calorific value. The cylindrical reactor had the least conversions and yields of 4–5%, with calorific values of 17.91-17.94&#xa0;MJ/kg, close to raw biomass. Closing the reactor top generally encouraged heat retention though in some cases it compromised convective transfer. The competent reactor configurations offer promising alternatives for sustainable bio char and activated carbon production from loose waste biomass in low-income and rural settings.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Comparative Evaluation of Alternative Reactor Configurations for Intra-Carbonization of Sawdust with Minimal External Fuel Use

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年6月17日

查看全文
  • Gratitude Charis,
  • Prof Bilal Patel

摘要

Alternative reactor designs to improve thermal efficiency and product quality of intra-carbonization of sawdust were evaluated. Configurations tested include a cylindrical reactor with an internal combustion chamber, a conical reactor with both internal and external combustion chambers with varying feedstock packing regimes. Results indicate that reactor geometry and air/fuel dynamics critically affect conversion rate, carbon yield, and char quality. The best conversion of ~ 95% and a yield of 46% was achieved using a stratified conical reactor + combustion chamber (SCCC) where there was quick and uniform heat transfer in 8 h. Conical reactor systems using an external combustion chamber had very low conversions and yields, particularly in mixed feedstock scenarios compared to stratified, due to reduced aeration for the latter. The conical reactor with internal combustion chamber (both SCCC and OCCC) achieved faster carbonization, reaching over 90% conversion in 8–10 h. The two also had the best quality of charred biomass of between 23.33 MJ/kg and 23.41 MJ/kg gross calorific value. The cylindrical reactor had the least conversions and yields of 4–5%, with calorific values of 17.91-17.94 MJ/kg, close to raw biomass. Closing the reactor top generally encouraged heat retention though in some cases it compromised convective transfer. The competent reactor configurations offer promising alternatives for sustainable bio char and activated carbon production from loose waste biomass in low-income and rural settings.

Graphical Abstract