Producing high CH4-content (>95%) biogas in high-pressure reactors with bio-hydrogen addition and with minimal CH4 loss

Om Prakash

doi:10.1016/j.fuel.2026.140590

Producing high CH4-content (>95%) biogas in high-pressure reactors with bio-hydrogen addition and with minimal CH4 loss

2026-07-07

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AI

O

Om Prakash

M

Masoud Makian

S

Seungyeob Han

S

Seoktae Kang

X

Xueqing Shi

D

Dong‐Hoon Kim *

DOI：10.1016/j.fuel.2026.140590

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• A two-stage high-pressure digestion was explored for high CH4 content. • The calculated value showed > 98% CH4 was possible at 5 bar. • The final CH4 content under continuous operation reached 95.7% at 5 bar. • The CH4 loss was reduced by 25% and effectively restricted to 9%. • Increased syntrophic bacteria indicated a metabolic synergy with methanogens.

Producing high CH4-content (>95%) biogas in high-pressure reactors with bio-hydrogen addition and with minimal CH4 loss

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