硫酸促进型固体超强酸在水预处理条件下的稳定性对比
钱祺;王丹雅;王磊;张雪;扈翟;赵学娟;李小保;李力成
【期刊名称】《化工学报》
【年(卷),期】2016(067)004
【摘要】以 TiO2和 ZrO2为载体的固体超强酸作为考察对象，重点对比研究了
载体与酸化方式不同的固体超强酸在两种不同温度水预处理条件下的催化稳定性。
XRD和BET表征结果显示在经过水预处理之后，各组固体超强酸的晶型和孔结构没有发生变化。
结合 FTIR、NH3-TPD 对比研究发现，各组固体超强酸的催化活
性在经过水预处理后均出现下降，水预处理温度越高，固体超强酸的酸量下降越多，酸强度减弱幅度越大，最终表现出催化活性明显下降；相比之下，硫酸促进型
TiO2固体超强酸的初始活性优于以ZrO2为载体的固体超强酸，但稳定性较差；
另外，对制备方式的研究发现，先焙烧再酸化所制得的固体超强酸其24SO −在水预处理过程中损失相对较少，表现出了较好的稳定性。
%In order to conveniently and rapidly evaluate the stability of the sulfated solid superacid against the water, the TiO2-supported and the ZrO2-supported solid superacid were used as the objects to study the influence of support and preparation process on the stability of solid superacid under different temperature water pretreatment. The physical structure of solid superacid wascharacterized by means of XRD and BET. It wasfound that there were
no significant changes in crystallite and pore structure of the solid superacid with water pretreatment. FTIR and NH3-TPD results showed that the catalytic activity of all the solid superacid decreased a lot after water
pretreatment. When the temperature of water pretreatment was rising, the amount of24SO− further dropped so that the acid amount fell and the catalytic activity of solid superacid decreased significantly. Moreover, the present work showed that the stability of ZrO2-supported sulfated solid superacid was better than that of TiO2-supported sulfated solid superacid but the initial activity was worse than the TiO2-supported superacid. In addition, the loss of24SO− of solid superacid prepared by calcination before24SO− acidification was less than that by24SO− acidification before calcination, which indicated that the preparation process had influence on the stability of solid superacid.
【总页数】8页(P1610-1617)
【作者】钱祺;王丹雅;王磊;张雪;扈翟;赵学娟;李小保;李力成
【作者单位】南京林业大学化学工程学院，江苏南京 210037;南京林业大学化学工程学院，江苏南京 210037;南京林业大学化学工程学院，江苏南京 210037;南京林业大学化学工程学院，江苏南京 210037;南京林业大学化学工程学院，江苏南京 210037;南京工程学院材料工程学院，江苏南京 211167;南京林业大学化学工程学院，江苏南京 210037;南京林业大学化学工程学院，江苏南京 210037【正文语种】中文
【中图分类】TQ032.4
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