摘要
考察了褐煤离子交换处理前后的加氢液化性能,探讨了不同形态铁催化剂和不同溶剂对褐煤加氢液化的影响。发现在液化反应条件下,离子交换煤中的(RCOO)_3Fe分解为Fe_3O_4,后者在有较高供氢性能的溶剂中和有硫存在的条件下进一步转化为Fe_(1-x)S,其催化活性高于Fe_3O_4。此外,在液化残渣的Mossbauer谱中发现有γ-Fe,它可能是由Fe_(1-x)S还原而成,其催化活性比Fe_(1-x)S更高。
In a micro-autoclave, using Xian-feng & Hong-qi lignite, the influences of different types of iron catalysis and solvents and especially the reaction behaviour of the lignite after ion exchange treatment wcre investigated. In the lignite after ion exchange treatment iron ion is well-distributed and combines with—COOH to form (RCOO)_3Fe. In hydroliquefaction process, three cases of transformation were found: (RCOO)_3Fe decomposed to Fe_3O_4; Fe_3O reduced partly to Fe_(1-x)S; Fe_3O_4 reduced fully to Fe_(1-x)S, which has higher activity than Fe_3O_4 as a catalyst. Messbauer spectrum shows that γ-Fe exists in reaction residues of Hong-qi lignite. The relevant mechanism was also discussed.
基金
国家自然科学基金会基金
联邦德国大众汽车公司基金~~
关键词
离子交换
褐煤
加氢
液化
ion exchange
lignite
hydrogenation
liquefaction
M(o|¨)oessbauer spectra-graphy '
