La–Ni–S2O82–/ZrO2–Al2O3 catalysts were successfully prepared by two different methods of sulfate impregnation, and the physico-chemical properties of the catalysts were characterized by X-ray diffraction, Brunauer–Emmett–Teller analysis, Fourier transform infrared spectroscopy, pyridine adsorption–infrared spectroscopy, and X-ray photoelectron spectroscopy techniques. Catalytic activities were evaluated in a fixed-bed flow reactor using n-pentane isomerization as the probe reaction. Compared with catalyst La–Ni–S2O82–/ZrO2–Al2O3-I, prepared by the traditional impregnation method, the catalyst La–Ni–S2O82–/ZrO2–Al2O3-W, prepared by the incipient-wetness impregnation method, possessed higher pore volume, pore size, sulfur content, and stronger Brønsted acid sites. The catalytic activity for La–Ni–S2O82–/ZrO2–Al2O3-W was maintained at around 56% within 3000 min with an isopentane selectivity of 88% which showed much greater stability than that of La–Ni–S2O82–/ZrO2–Al2O3-I. This can be attributed to the fact that (1) the large pore size and pore volume of La–Ni–S2O82–/ZrO2–Al2O3-W can largely suppress carbon deposition and (2) the more numerous and stronger Brønsted acid sites for La–Ni–S2O82–/ZrO2–Al2O3-W guaranteed to provide enough acid sites for isomerization during the reaction process.

中文翻译：

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硫酸化方法对La-Ni-S2O82-/ZrO2-Al2O3固体超强酸催化剂正戊烷异构化的影响

通过两种不同的硫酸盐浸渍方法成功制备了La-Ni-S2O82-/ZrO2-Al2O3催化剂，并通过X射线衍射、Brunauer-Emmett-Teller分析、傅里叶变换红外光谱表征了催化剂的理化性质、吡啶吸附-红外光谱和X射线光电子能谱技术。在固定床流动反应器中使用正戊烷异构化作为探针反应评估催化活性。与传统浸渍法制备的催化剂La-Ni-S2O82-/ZrO2-Al2O3-I相比，初湿浸渍法制备的催化剂La-Ni-S2O82-/ZrO2-Al2O3-W具有更高的孔隙率体积、孔径、硫含量和更强的布朗斯台德酸位点。La–Ni–S2O82–/ZrO2–Al2O3-W 的催化活性在 3000 分钟内保持在 56% 左右，异戊烷选择性为 88%，显示出比 La–Ni–S2O82–/ZrO2–Al2O3 更高的稳定性-一世。这可归因于以下事实：（1）La–Ni–S2O82–/ZrO2–Al2O3-W 的大孔径和孔体积可以在很大程度上抑制碳沉积；（2）La 的更多和更强的布朗斯台德酸位点–Ni–S2O82–/ZrO2–Al2O3-W 保证在反应过程中为异构化提供足够的酸位。