Abstract Structural features of the co-liquefaction solid residue (CLSR) from the co-liquefaction of lignite and Merey atmospheric residue (MRAR) were analyzed to investigate the internal correlation relevant to the hydroconversion process of the reaction system. The feedstocks were loaded by using different catalysts, which resulted in a series of CLSRs with different hydroconversion degree after co-liquefaction. The experimental results showed that the carbonaceous solid conversion efficiency was related to the H/C atomic ratio and O content of the CLSR. X-ray diffraction (XRD) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, and thermogravimetric analysis were used to study the structural parameter changes of the CLSRs from co-liquefaction with different catalysts. Experimental data of the selected analytical parameters exhibited credible relationship with the carbonaceous solid conversion efficiency. Considering the structure variation of CLSRs was clearly associated with the conversion of co-liquefaction, the utilization of linear fitting for the approximate evaluation of carbonaceous solid conversion efficiency was suggested. A comparison of the particle-size distribution and microscopic morphology of different CLSRs showed that the small mean particle diameter and a fragmented CLSR shape resulted as distinctive features for the high hydroconversion of co-liquefaction. Besides, the microscopic feature variation indicated the inhibition of coke formation in the reaction system was crucial to improve the hydroconversion degree of co-liquefaction of lignite and heavy oil.

中文翻译：

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褐煤与Merey常压渣共液化固体渣的结构形态变化

摘要 分析了褐煤与梅雷常压渣油(MRAR)共液化共液化固体渣油(CLSR)的结构特征，研究了与反应体系加氢转化过程相关的内在关联。通过使用不同的催化剂负载原料，共液化后产生一系列具有不同加氢转化度的CLSR。实验结果表明，碳质固体转化效率与CLSR的H/C原子比和O含量有关。X射线衍射（XRD）光谱、傅里叶变换红外（FTIR）光谱和热重分析用于研究CLSRs与不同催化剂共液化的结构参数变化。所选分析参数的实验数据显示出与碳质固体转化效率的可靠关系。考虑到 CLSRs 的结构变化与共液化转化明显相关，建议利用线性拟合来近似评估碳质固体转化效率。对不同 CLSR 的粒度分布和微观形态的比较表明，小的平均粒径和破碎的 CLSR 形状是共液化的高加氢转化率的显着特征。此外，微观特征变化表明，抑制反应体系中的焦炭形成对于提高褐煤和稠油共液化的加氢转化程度至关重要。