Effects of reaction time on product yields during the co-liquefaction of Shengli coal and corn stalk

The co-liquefaction process of Shengli coal and corn stalk was studied by using tubular resonance agitation microautoclave reactor (17 ml) heated by salt bath. Effectiveness of the co-liquefaction was expressed by feedstock conversion, oil and gas yield, asphaltene yield and preasphaltene yield. The results indicated that the differences in reaction temperatures (360°C, 390°C and 420°C) had led to the different trends of the conversion, oil and gas yield, asphaltene yield and preasphaltene yield. The transformation from preasphaltene to asphaltene had restricted the co-liquefaction reactions at 360°C, while the conversion from asphaltene to oil could inhibit the co-liquefaction reactions at 390°C and 420°C. The fundamental reaction process of co-liquefaction was also analyzed in this study.