Scholarlink

<p>Heterogeneous briquettes formulated from abundant rice husk and pine sawdust blended and treated with HCl can address limited access to clean energy. However, briquettes from untreated blends of rice husk and pine sawdust exhibit higher ash content, which reduces their thermochemical characteristics. The aim of the study was to determine the effect of HCl on the thermal-chemical properties of heterogeneous briquettes made from a blend of rice husk and pine sawdust, treated at varying concentrations. The study treated a blend of 10 wt% rice husk and 90 wt% pine sawdust with HCl concentrations of 1%, 2%, 3%, 4%, and 5% at ambient temperature for one hour. The briquettes were then fabricated and analyzed to identify optimal conditions that enhance calorific value and thermal efficiency while reducing emissions. The novelty lies in blending rice husk and pine sawdust biomasses, where pine sawdust provides better calorific value and lower ash content, while rice husks, in addition to ensuring sustainability due to being non-utilized yet readily available, provide thermal stability to the briquettes, given relatively higher silica content. The study’s novelty extends beyond ash and higher heating value analyses to lignocellulose composition, thermal efficiency, and emissions analysis. Findings revealed that briquettes from treated blends exhibited reduced ash content (2.34 ± 0.05% vs. 10.84 ± 0.85%), higher HHV (18.99 ± 0.02&#xa0;MJ/kg vs. 18.15 ± 0.09&#xa0;MJ/kg), and thermal efficiency (73.49 ± 1.07% vs. 49.90 ± 1.08%) than untreated briquettes. These briquettes had reduced CO emissions (0.82 ± 0.01%), meeting the Tier 5 range (≤ 3&#xa0;g/MJd) and PM<sub>2.5</sub> emissions (80.22 ± 1.96&#xa0;mg/MJd) meeting the Tier 3 range (&gt; 6 2&#xa0;mg/MJd to ≤ 218&#xa0;mg/MJd). 5% HCl was the optimal treatment condition, in which briquettes exhibited the highest HHV and thermal efficiency while achieving the lowest PM<sub>2.5</sub> and relatively low CO emissions. The study contributes to the literature by demonstrating that acid-treated biomass briquettes, optimally at 5% HCl, achieve significantly lower ash content, higher calorific value, and thermal efficiency, as well as reduced CO and PM<sub>2.5</sub> emissions, meeting international clean cooking standards, thereby advancing sustainable fuel development and providing practical means for cleaner energy transitions.</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

Thermal–chemical characterization of hydrochloric acid-treated rice husk–pine sawdust heterogeneous briquettes

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年6月25日

查看全文
  • Ronald Walozi,
  • George Samuel Onep,
  • Yinka Sofihullahi Sanusi,
  • Omer Eisa Babiker,
  • Milon Selvam Dennison,
  • Alphonse Candia,
  • Samuel Okurut,
  • Benard Wamubirigwe

摘要

Heterogeneous briquettes formulated from abundant rice husk and pine sawdust blended and treated with HCl can address limited access to clean energy. However, briquettes from untreated blends of rice husk and pine sawdust exhibit higher ash content, which reduces their thermochemical characteristics. The aim of the study was to determine the effect of HCl on the thermal-chemical properties of heterogeneous briquettes made from a blend of rice husk and pine sawdust, treated at varying concentrations. The study treated a blend of 10 wt% rice husk and 90 wt% pine sawdust with HCl concentrations of 1%, 2%, 3%, 4%, and 5% at ambient temperature for one hour. The briquettes were then fabricated and analyzed to identify optimal conditions that enhance calorific value and thermal efficiency while reducing emissions. The novelty lies in blending rice husk and pine sawdust biomasses, where pine sawdust provides better calorific value and lower ash content, while rice husks, in addition to ensuring sustainability due to being non-utilized yet readily available, provide thermal stability to the briquettes, given relatively higher silica content. The study’s novelty extends beyond ash and higher heating value analyses to lignocellulose composition, thermal efficiency, and emissions analysis. Findings revealed that briquettes from treated blends exhibited reduced ash content (2.34 ± 0.05% vs. 10.84 ± 0.85%), higher HHV (18.99 ± 0.02 MJ/kg vs. 18.15 ± 0.09 MJ/kg), and thermal efficiency (73.49 ± 1.07% vs. 49.90 ± 1.08%) than untreated briquettes. These briquettes had reduced CO emissions (0.82 ± 0.01%), meeting the Tier 5 range (≤ 3 g/MJd) and PM2.5 emissions (80.22 ± 1.96 mg/MJd) meeting the Tier 3 range (> 6 2 mg/MJd to ≤ 218 mg/MJd). 5% HCl was the optimal treatment condition, in which briquettes exhibited the highest HHV and thermal efficiency while achieving the lowest PM2.5 and relatively low CO emissions. The study contributes to the literature by demonstrating that acid-treated biomass briquettes, optimally at 5% HCl, achieve significantly lower ash content, higher calorific value, and thermal efficiency, as well as reduced CO and PM2.5 emissions, meeting international clean cooking standards, thereby advancing sustainable fuel development and providing practical means for cleaner energy transitions.