2 research outputs found
Efficient Two-Step Utilization of Organic Matter in Shengli Lignite for Producing Chemicals and Supercapacitor Electrode Materials
Conversion of organic matter in lignite into chemicals
and high-performance
carbon materials is a promising approach for clean and efficient utilization
of lignite. Herein, Shengli lignite (SL) is subjected to supercritical
ethanolysis, followed by ultrasonic extraction with isometric carbon
disulfide/acetone for separating SL into soluble organic matters (SOMs)
and insoluble extraction residue (ER) with highly condensed aromatic
structures. According to the analyses with gas chromatography/mass
spectrometry (GC/MS) and Orbitrap MS, the SOMs were mainly composed
of oxygen-containing compounds, such as arenols, aliphatic esters,
and aromatic esters, which can be used as feedstock for producing
value-added chemicals. The ER was used as a carbon precursor to produce
three-dimensional porous carbon materials (PCMs) through precarbonization
and activation with KOH using nano-ZnO as an in situ template. The
prepared PCMs possessed high stability, large specific surface area,
and abundant oxygen-doped carbon, showing a high specific capacitance
of 300 F g–1 at 0.5 A g–1 in a
three-electrode system, and the capacitance retention was 100% after
10,000 cycles of charge and discharge at 5 A g–1 in a two-electrode system
Sequential Thermal Dissolution of Huolinguole Lignite in Methanol and Ethanol
Sequential Thermal Dissolution of Huolinguole Lignite in Methanol and Ethano