Characteristics of low-temperature co-pyrolysis products of ulva and lignite

The low-temperature co-pyrolysis experiments of Australia lignite (AL) blending different proportions of ulva are undertaken. The results show that the amount of pyrolysis oil decreases after a prior increase with the increase of ulva blending ratio, indicating an inhibition effect after first promotion compared with calculated values. When the blending ratio is 30%, the yield of pyrolysis oil rises to 12.5%, an increase of 26.01% to that with pure lignite and reaches the most-positive deviation to the theoretical values. The alkane in co-pyrolysis oil increases by 34.46% in comparison to that with the pure lignite through GC-MS measurements, which improves the quality of pyrolysis oil. Co-pyrolysis chars exhibit depth cracks, improved reactivity and adsorption by the SEM analysis. Co-pyrolysis chars therefore have a wider range of industrial applications. © 2016, Chemical Industry Press. All right reserved.