Fig. 1: Catalytic conversion of beech sawdust over the prepared nickel-based alloy catalyst.
From: Catalytic production of low-carbon footprint sustainable natural gas
a Carbon yield of solid, liquid, and gas products and the distribution of gas products at various temperatures. b Analysis of solid carbon species deposited on the used catalysts by UV Raman spectroscopy. The peak at 1615 cm−1 was assigned to the stretching vibration of C=C. c 2D HSQC NMR and MALDI-TOF-MS (the inset) analysis of the liquid products after the reaction at 250 °C. d 270 °C. e 300 °C. f The possible lignin structure in the liquid products. Reaction condition: 1.0 g beech sawdust, 5.2 mmol nickel-based alloy catalyst (based on nickel), 20 mL H2O, 4 MPa H2, 5 h. The gas, solid, and liquid products were quantified by gas chromatography, total organic carbon instrument and thermogravimetric analysis, respectively. The carbon yield was calculated according to the mole numbers of carbon in the reaction products and substrates.
