Co-pyrolysis Adsorbent

High capacity, high strength

Prepared by co-pyrolysis of low-polysaccharide lignin, crude oil, and clay, this adsorbent avoids the poor mechanical strength typical of biochar adsorbents while retaining high adsorption capacity.

Zhang, Jie · Zhang, Yaozhong · Zhang, Wangyuan · Weiyu, Bi · Cheng, Wen · Ke, Dong · Wei, Lv · Dong, Sanbao

Biomass and Bioenergy 2026

Specifications

Compressive strength

{'zh': '10.28', 'en': '10.28'} MPa

Specific surface area

{'zh': '594.52', 'en': '594.52'} m² g⁻¹

COD removal efficiency

{'zh': '86.2', 'en': '86.2'} %

Heavy metal removal efficiency

{'zh': '99.5', 'en': '99.5'} %

Advantages

High mechanical strength

Achieves a compressive strength of 10.28 MPa, overcoming the poor mechanical strength of conventional biochar adsorbents and broadening applicability.

High adsorption capacity

Large specific surface area of 594.52 m² g⁻¹ with micro-void architecture, providing high adsorption capacity for both oil and heavy metal ions.

High removal efficiency

Removes 86.2% of COD and up to 99.5% of heavy metal ions, reaching equilibrium within 90 minutes.

Applications

• Oil-water separation：Used to treat oily wastewater and reduce residual oil content.
• Heavy metal wastewater treatment：Efficiently removes heavy metal ions such as Cr⁶⁺, Mn²⁺, Cu²⁺, Zn²⁺ from water.
• Biomass-derived adsorbents：Utilizes low-polysaccharide lignin as a raw material for high-value biomass conversion.