Feb 01, 2022 · As shown in Figure 8 a, the yields of solid residues were 84.8, 85.0, 86.6, and 87.4 wt.% for FeRS-500, 500-Q, 500-25r, and 500-50r, respectively. Heating rates exhibited negligible effects on products distribution, while stirring produced more solid residues but less oil production.