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Long-Chain Hydrocarbons from Nonthermal Plasma-Driven Biogas Upcycling.

Josip KnezevicTianqi ZhangRenwu ZhouJungmi HongRusen ZhouChristopher BarnettQiang SongYuting GaoWanping XuDingxin LiuNicholas ProschogoBiswaranjan MohantyJyah StrachanBehdad SoltaniFengwang LiThomas MaschmeyerEmma Catherine LovellPatrick J Cullen
Published in: Journal of the American Chemical Society (2024)
The burgeoning necessity to discover new methodologies for the synthesis of long-chain hydrocarbons and oxygenates, independent of traditional reliance on high-temperature, high-pressure, and fossil fuel-based carbon, is increasingly urgent. In this context, we introduce a nonthermal plasma-based strategy for the initiation and propagation of long-chain carbon growth from biogas constituents (CO 2 and CH 4 ). Utilizing a plasma reactor operating at atmospheric room temperature, our approach facilitates hydrocarbon chain growth up to C40 in the solid state (including oxygenated products), predominantly when CH 4 exceeds CO 2 in the feedstock. This synthesis is driven by the hydrogenation of CO 2 and/or amalgamation of CH x radicals. Global plasma chemistry modeling underscores the pivotal role of electron temperature and CH x radical genesis, contingent upon varying CO 2 /CH 4 ratios in the plasma system. Concomitant with long-chain hydrocarbon production, the system also yields gaseous products, primarily syngas (H 2 and CO), as well as liquid-phase alcohols and acids. Our finding demonstrates the feasibility of atmospheric room-temperature synthesis of long-chain hydrocarbons, with the potential for tuning the chain length based on the feed gas composition.
Keyphrases
  • room temperature
  • ionic liquid
  • solid state
  • anaerobic digestion
  • risk assessment
  • wastewater treatment
  • municipal solid waste
  • heavy metals