The role of acidity (nature, concentration, strength) and textural properties in the etherification of glycerol with tert-butyl alcohol was studied for a wide range acid catalysts, such as Amberlyst® 15, silica, alumina, silica alumina and four type of zeolite, i.e. FAU, MOR, ^∗BEA and MFI. The etherification of glycerol by tert-butyl alcohol is a thermodynamically limited reaction that occurs through a successive reaction sequence and follows an Eley-Rideal type mechanism. We found major evidence that glycerol etherification is not only a function of the amount of Brønsted acid sites, but that it further proceeds via a product shape selectivity mechanism. Indeed, the formation of di-substituted ethers appears at very low conversions for zeolites compared to meso- and macroporous acid catalysts. ^∗BEA and MFI zeolites feature similar confining voids and resulting thus in similar intrinsic acid strengths (as proved by n-hexane cracking), but differ in the connectivity (4 vs. 6 channels) and access to these voids (0.54 vs. 0.67 nm), which leads to diffusion issues, notably for the MFI zeolite.

研究了酸度（性质，浓度，强度）和质地性质在甘油与叔丁醇醚化中的作用，适用于多种酸催化剂，例如15，二氧化硅，氧化铝，二氧化硅氧化铝和四种沸石，即。FAU，MOR，^∗ BEA和MFI。叔丁基对甘油的醚化丁醇是一种热力学上受限的反应，它通过连续的反应序列发生，并且遵循Eley-Rideal类型的机理。我们发现主要证据表明甘油醚化不仅是布朗斯台德酸位点数量的函数，而且还通过产物形状选择性机制进一步进行。实际上，与中孔和大孔酸催化剂相比，二取代醚的形成以非常低的沸石转化率出现。^* BEA和MFI沸石设有类似围的空隙和在类似固有的酸强度从而导致（由作为证明Ñ正己烷裂化），但在连接不同（4比6个信道），并访问这些空隙（0.54比0.67纳米），这会导致扩散问题，尤其是MFI沸石。