在300 m L加氢试验装置上进行加氢稳定试验,考察了反应压力对煤直接液化循环溶剂性质的影响,并通过0.5 L高压釜煤液化试验,考察了煤在不同加氢深度循环溶剂中的液化效果。结果表明,随着溶剂加氢反应压力的升高,循环溶剂密度、黏度及氮...在300 m L加氢试验装置上进行加氢稳定试验,考察了反应压力对煤直接液化循环溶剂性质的影响,并通过0.5 L高压釜煤液化试验,考察了煤在不同加氢深度循环溶剂中的液化效果。结果表明,随着溶剂加氢反应压力的升高,循环溶剂密度、黏度及氮含量递减,氢碳原子比及供氢指数递增,循环溶剂性质得到改善,供氢性能得到提高,从而促进煤的转化率和油收率提高。当加氢反应压力由12.5 MPa升至19.3 MPa时,煤的转化率从87.21%提高到88.40%,液化油收率从51.62%提高到55.58%。展开更多
The rate constants for the hydrogen donation of three 3-aryl-benzofuranone compounds with tert-butoxyl radicals have been cal-culated through laser flash photolysis (LFP) technique, which were used to evaluate the hyd...The rate constants for the hydrogen donation of three 3-aryl-benzofuranone compounds with tert-butoxyl radicals have been cal-culated through laser flash photolysis (LFP) technique, which were used to evaluate the hydrogen donating abilities of those 3-aryl-benzofuranone compounds. The antioxidant activities of those 3-aryl-benzofuranone compounds in polypropylene (PP) have been studied using the oxidation induction time (OIT) of PP stabilized by those 3-aryl-benzofuranone compounds too. It has been found that the methyl group on the 2'-position can prevent the hydrogen donation of 3-aryl-benzofuranone with tert-butoxyl radicals and weakens the antioxidant activity of 3-aryl-benzofuranone in the oxidation of PP, i.e., the greater is the hydrogen do-nating ability of 3-aryl-benzofuranone with radicals, the better is the antioxidant activity of 3-aryl-benzofuranone in the oxidation of PP in the presence of oxygen.展开更多
基金supported by the National Natural Science Foundation of China (Grant No 20806023)East China University of Science and Technology (Grant No YA0157107)
文摘The rate constants for the hydrogen donation of three 3-aryl-benzofuranone compounds with tert-butoxyl radicals have been cal-culated through laser flash photolysis (LFP) technique, which were used to evaluate the hydrogen donating abilities of those 3-aryl-benzofuranone compounds. The antioxidant activities of those 3-aryl-benzofuranone compounds in polypropylene (PP) have been studied using the oxidation induction time (OIT) of PP stabilized by those 3-aryl-benzofuranone compounds too. It has been found that the methyl group on the 2'-position can prevent the hydrogen donation of 3-aryl-benzofuranone with tert-butoxyl radicals and weakens the antioxidant activity of 3-aryl-benzofuranone in the oxidation of PP, i.e., the greater is the hydrogen do-nating ability of 3-aryl-benzofuranone with radicals, the better is the antioxidant activity of 3-aryl-benzofuranone in the oxidation of PP in the presence of oxygen.
