トウモロコシ穂軸を用いた農業廃棄物からの炭素回収
Carbon Capture from Agricultural Waste using Corn Cob (原題)
Joy Ehimwenma Ossai, Chukwuemeka Peter Ukpaka, Osarieme Uyi Osazuwa, Desuen Ajir, Ikpia Emmanuel Chukwuka
🤖 gxceed AI 要約
日本語
ナイジェリアで豊富な農業廃棄物であるトウモロコシ穂軸を400℃で炭化し、10%塩酸で活性化してCO2吸着材を開発した。SEM・EDS分析で高い多孔性と94.18原子%の炭素含有量を確認。固定床吸着実験では5cm床で吸着容量1.49mmol/g、10cm床で0.90mmol/gを示し、両床とも有効利用率66.7%と安定した性能を達成した。希薄条件下でのCO2回収に有効な低コスト・持続可能な材料であることを実証した。
English
Acid-activated corncob, an abundant agricultural waste in Nigeria, was carbonized and activated to create a porous CO2 adsorbent. Characterization showed high porosity and 94.18 atomic% carbon. Fixed-bed tests achieved adsorption capacities of 1.49 mmol/g (5 cm bed) and 0.90 mmol/g (10 cm bed) with 66.7% fractional utilization, confirming corncob-derived carbon as a viable low-cost material for dilute CO2 capture.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本ではCCUSは重要政策だが、本論文はナイジェリアの農業廃棄物利用に焦点を当てており、直接的な日本文脈への示唆は限定的。ただし、低コスト吸着材開発は日本のCCUS技術開発やカーボンリサイクル戦略に関連する基礎的知見を提供する。
In the global GX context
This study contributes to global CCUS research by demonstrating a low-cost, sustainable adsorbent from agricultural waste, relevant to circular economy and decarbonization efforts. While not directly tied to disclosure frameworks, it supports the technological basis for carbon capture in developing regions and aligns with global net-zero innovation.
👥 読者別の含意
🔬研究者:農業廃棄物由来のCO2吸着材の性能データを提供し、低コストCCUS材料の設計に有用。
🏢実務担当者:農業廃棄物を活用したCO2回収の可能性を示すが、実装にはスケールアップと経済性評価が必要。
🏛政策担当者:廃棄物管理とCCUSを組み合わせた政策立案の参考になるが、直接的な規制含意は限定的。
📄 Abstract（原文）
This study investigated the potential of acid-activated corncob as a sustainable and low-cost adsorbent for carbon dioxide (CO2) capture from gas streams. Corncob, an abundant agricultural waste in Nigeria, was carbonized at 400°C and activated with 10% hydrochloric acid to develop a porous carbon structure suitable for CO2 adsorption. The activated material was characterized using Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDS), revealing a highly porous structure with 94.18 atomic % carbon content and 3.51 atomic % nitrogen, which enhances CO2 capture through acid-base interactions. The bulk density of the activated corncob was determined as 0.3948 g/mL, indicating substantial porosity development. Fixed-bed adsorption experiments were conducted at two bed heights (5 cm and 10 cm) using uniform particle size (500 μm) under isothermal conditions (29°C) with pure CO2 gas at a flow rate of 0.5 L/min and inlet concentration of 930 ppm. Breakthrough curve analysis showed that the 5 cm bed achieved a breakthrough time of 30 minutes and exhaustion time of 45 minutes, with a CO2 adsorption capacity of 1.49 mmol/g. The 10 cm bed exhibited breakthrough and completion times of 36 and 54 minutes respectively, with an adsorption capacity of 0.90mmol/g. The bed heights demonstrated consistent fractional capacity utilization of 66.7%, indicating efficient adsorbent performance. The mass transfer zone widths were 1.67 cm and 3.33 cm for the 5 cm and 10 cm beds respectively. This study confirmed that acid-activated carbon derived from corncob is a viable and sustainable material for carbon dioxide (CO2) capture under dilute conditions.
🔗 Provenance — このレコードを発見したソース
- openalex https://journals.nipes.org/index.php/jete/article/view/3806first seen 2026-10-07 05:03:21
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