Montmorillonite (Mnt)-based solid acids have a wide range of applications in catalysis and adsorption of pollutants. For such solid acids, the acidic characteristic often plays a significant role in these applications. The objective of the current study was to examine the effects of H₃PO₄-activation and supporting WO₃ on the textural structure and surface acidic properties of Mnt. The Mnt-based solid acid materials were prepared by H₃PO₄ treatment and an impregnation method with a solution of ammonium metatungstate (AMT) and were examined as catalysts in the dehydration of glycerol to acrolein. The catalysts were characterized by nitrogen adsorption-desorption, powder X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, scanning electronic microscopy (SEM), X-ray photoelectron spectroscopy (XPS), diffuse reflectance ultraviolet-visible (DR UV-Vis) spectroscopy, temperature programmed desorption of NH₃ (NH₃-TPD), diffuse reflectance Fourier-transform infrared (DR FTIR) spectroscopy of adsorbed pyridine, and thermogravimetric (TG) analyses. The phosphoric acid treatment of Mnt created Brönsted and Lewis acid sites and led to increases in specific surface areas, porosity, and acidity. WO₃ species influenced total acidity, acid strength, the numbers of Brönsted and Lewis acid sites, and catalytic performances. A high turnover frequency (TOF) value (31.2 h⁻¹) based on a maximal 60.7% yield of acrolein was reached. The correlation of acrolein yield with acidic properties indicated that the cooperative role of Brönsted and Lewis acid sites was beneficial to the formation of acrolein and a little coke deposition (<3.3 wt.%). This work provides a new idea for the design of solid acid catalysts with cooperative Brönsted and Lewis acidity for the dehydration of glycerol.

蒙脱石（Mnt）基固体酸在污染物的催化和吸附方面有着广泛的应用。对于此类固体酸，酸性特性通常在这些应用中发挥重要作用。本研究的目的是检查H ₃ PO ₄ -活化和支持WO ₃对Mnt的结构结构和表面酸性性能的影响。_{H 3} PO ₄制备Mnt基固体酸材料用偏钨酸铵 (AMT) 溶液处理和浸渍方法，并在甘油脱水制丙烯醛中作为催化剂进行了检查。采用氮气吸附-脱附、粉末X射线衍射(XRD)、傅里叶变换红外(FTIR)光谱、扫描电子显微镜(SEM)、X射线光电子能谱(XPS)、漫反射紫外-可见( DR UV-Vis) 光谱、程序升温脱附 NH ₃ (NH ₃ -TPD)、吸附吡啶的漫反射傅里叶变换红外 (DR FTIR) 光谱和热重 (TG) 分析。Mnt 的磷酸处理产生了 Brönsted 和 Lewis 酸位，并导致比表面积、孔隙率和酸度增加。WO₃种物质影响了总酸度、酸强度、Brönsted 和 Lewis 酸位点的数量以及催化性能。基于最大 60.7% 的丙烯醛产率，达到了高周转频率 (TOF) 值 (31.2 h ^{-1 )。}丙烯醛收率与酸性的相关性表明，Brönsted 和 Lewis 酸位的协同作用有利于丙烯醛的形成和少量的积炭（<3.3 wt.%）。这项工作为设计具有协同布朗斯特德和路易斯酸度的固体酸催化剂用于甘油脱水提供​​了新思路。