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- The order of Bronsted acid strength are FSPrHY>FSY>USPrHY>USY>PrHY>NH_4Y. B 酸强度顺序为:FSPrHY>FSY>USPrHY>USY>PrHY>NH_4Y.
- The dynamic processes of Bronsted acid sites involved in the formation ofintermediates are observed directly by ]H MAS NMR. 直接观测到了B酸位(活性中心)在反应中的动态变化过程，B酸位参与了中间物种的生成。
- With the dehydration the free volume inside cages bacame larger, and when dehydrated to a certain degree,Bronsted acid, as the ac. 研究表明，随着水的逐步脱除；笼内自由体积逐步增大；当脱水至一定程度后．笼内开始出现活性中心-质子酸。
- Researches in and application of Lewis acid,Bronsted acid,alkali, alkaline earth and molecular sieve catalysts were described in detail. 对采取烷基化法和酰基化法合成2,6-二烷基萘的工艺路线,尤其对所使用催化剂的研究进展进行了评述。
- Researches in and application of Lewis acid, Bronsted acid, alkali, alkaline earth and molecular sieve catalysts were described in detail. 对采取烷基化法和酰基化法合成2,6-二烷基萘的工艺路线，尤其对所使用催化剂的研究进展进行了评述。
- After being characterized by FTIR and MAT,it was found that with increasing P content,the number of total acid sites and Bronsted acid sites on cat. 在用FTIR技术和MAT试验等催化剂表征手段对其表征之后，发现酸性、酸密度和强度等与催化剂的裂化性能有很大关系；
- The active centers of ethoxylation are composed of WO x and W 6+ ; the active centers of activated alcohol are the weak Bronsted acid sites of carrier ( e.g., HZSM-5 ). 氧缺位的WOx 和W6+ 共同组成催化剂表面L酸活性中心 ;而载体 (如H -ZSM -5)弱的B酸位是醇 (ROH)的活性中心 .
- Meanwhile, silicalite-1 was confirmed to have no Bronsted acidic protons. 同时证实了Silicalite-1中不能形成Bronsted酸中心;
- Exprimental results showed that bothBronsted acid and Lewis acid were essential in the reactions, while the hydration of propylenewas catalyzed by Bronsted acid and the formation of diisopropyl et... 丙烯水合生成异丙醇的反应主要在B酸位上进行;而强酸部分的L酸位对二异丙基醚的生成起着主要作用.
- The Zn species in the catalysts are responsible for propane and cyclic hydrocarbons dehydrogenation, while the Bronsted acid sites located in the channel of Zn/HZSM-5 oligomerization and cyclization. 丙烷在改性分子筛上芳构化过程是金属离子和分子筛酸性中心共同作用的双功能催化过程。
- With the decrease of total acidity, the activity of aromatization decrease. With the decrease of strong Bronsted acid sites, cracking reactions decrease. 各改性HZSM-5分子筛催化剂芳构化性能变化与表面酸性有关,总酸量下降,芳构化活性下降,强B酸中心减少,深度裂解反应减少;
- Keywords Positron annihilation;Zeolite;Spin exchange;Bronsted acid; 正电子湮没;沸石分子筛;自旋交换;质子酸;
- Keywords mordenite;ion-exchange;bronsted acid;isomerization;pentane;cata lyst; 丝光沸石;脱钠度;质子酸;异构化;正戊烷;催化剂;
- Keywords lewis acid;Bronsted acid;Synthesis;t amylalcohol;t amylbenzene.; 路易斯酸;质子酸;合成;叔戊醇;叔戊苯;
- pyridinium-based BrOnsted acidic functional ionic liquids BrOnsted酸性功能离子液体
- He gave me a taste of his acid wit. 他让我尝到了他敏锐尖刻之机智的滋味。
- Acid irritates the stomach lining. 酸能刺激胃黏膜。
- Acid had pitted the surface of the silver. 酸把银器的表面腐蚀了。
- I am doing an experiment of neutralizing acid. 我在做一个中和酸的实验。
- Can Jones beat Smith? That's the acid test. 琼斯能击败史密斯吗？那是个严峻的考验。
