Catalyst Deactivation and Regeneration Studies as a Probe to Improve the Catalytic Properties of Supported Solid Acid Catalysts

Richard D. Gonzalez的建议是通过增加具有活性和抗焦化的硫酸盐物质的浓度来最大化用于正丁烷异构化的硫酸化氧化锆催化剂的性能。 硫酸化氧化锆将通过溶胶-凝胶氧化锆和二氧化硅的共沉积或溶胶-凝胶氧化锆在高表面积二氧化硅载体上的沉积，然后热处理和硫酸化来制备。将使用几种技术来将合成和处理程序与活性硫酸盐物种的分数和催化性能联系起来。它们包括：来自反应的失活曲线，SO2和CO2释放，特别是600 ℃下SO2的热重-红外光谱（TG-IR），用TG-IR测量的焦炭沉积，和通过吸附吡啶的IR测定的布朗斯台德与刘易斯酸度比。该研究的意义是基于对用于烷烃活化的固体酸催化剂的持续需求，该固体酸催化剂将取代环境风险的液体酸催化剂。

Professor Richard D. Gonzalez' proposal is to maximize the performance of sulfated zirconia catalysts for n-butane isomerization by increasing the concentration of sulfate species that are active and resistant to coking. The sulfated zirconia will be prepared by co-deposition of sol-gel zirconia and silica or deposition of sol-gel zirconia on high-surface area silica support, followed by thermal treatment and sulfation. Several techniques will be used to relate the synthesis and treatment procedure to the fraction of active sulfate species and the catalytic performance. They include: deactivation profiles from the reaction, thermogravimetry-infrared spectroscopy (TG-IR) of SO2 and CO2 evolution, in particular SO2 at 600 C, coke deposition measured with TG-IR, and Broensted to Lewis acidity ratio determined by IR of adsorbed pyridine. The study's significance is based on the ongoing need for solid acid catalysts for alkane activation that would replace the environmentally risky liquid acid catalysts.