物理化学学报 >> 1987, Vol. 3 >> Issue (02): 204-208.doi: 10.3866/PKU.WHXB19870216
杨梦彦; 冯福盛; 胡瑶村
Yang Mengyan; Feng Fusheng; Hu Yaocun
摘要： 用自行装置的流动-差热吸附量热系统测定了氨、吡啶及芳烃在氢型丝光沸石(HM)上的吸附热。发现氨的吸附热-吸附量曲线上存在拐点, 证实HM表面上存在能量差异较大的两类氨吸附中心。氨中毒的HM对芳烃的吸附热测定结果表明, 不同的吸附区域对氨和芳烃的吸附强度各有不同。
Abstract: The adsorption heats on h-mordenite (HM) have been investigated by flow-DTA adsorptive calorimetric technique. Plots of differential absorption heats. (Q_d) of ammonia, pyridine, benzene, toluene and p-xylene at 200 ℃ against varying adsorption amounts (A) were given respectively. There appears a turning point on the plot of Q_d of ammonia vs. A, which shows that there are two kinds of acid sites on HM, one is strong with the adsorption heat of ammonia in the range of 120-155 kJ mol~(-1), and the other weak in the range of 70—85 kJ mol~(-1). For the purpose of getting the information about the adsorption of aromatic compounds on different adsorption regions containing different kinds of acid sites. the adsorption heat of benzene and toluene on HM partly and totaly poisoned by ammonia were respectively measured. The results dempstrate that the non-physical adsorption of aromatic compounds only occurs on the regions containing acid sites, nevertheless, the adsorption strength of aromatic compounds is different from that of ammonia on each region.
杨梦彦;冯福盛;胡瑶村. 流动-差热吸附量热系统Ⅱ. 氢型丝光沸石吸附热的研究[J]. 物理化学学报, 1987, 3(02), 204-208. doi: 10.3866/PKU.WHXB19870216
Yang Mengyan; Feng Fusheng; Hu Yaocun. FLOW-DTA ADSORPTIVE CALORIMETRIC SYSTEM Ⅱ. STUDIES OF ADSORPTION HEATS ON H-MORDENITE[J]. Acta Phys. -Chim. Sin. 1987, 3(02), 204-208. doi: 10.3866/PKU.WHXB19870216
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