The impact of the textural properties of mordenite zeolites on the growth and toxicity of coke formed at 350 °C during propene transformation is investigated. The addition of intracrystal mesopores by alkaline treatment to a unidimensional zeolite is a simple tool for changing its classical deactivation mode, pore blocking, to a mode more usual on zeolites with a three-dimensional framework, poisoning. This change requires that the zeolite possess a high hierarchy factor, as a result of severe alkaline conditions generating a lot of intracrystal mesopores. Desilication treatment removes part of the Brønsted acid sites and generates extra-framework aluminum species that can block access to the protonic sites and/or enhance their strength, which increases the coking rate. A mild acid leaching is enough to dissolve them. The presence of a few mesopores is sufficient to enhance the access of oxygen to coke, which favor its combustion.

研究了丝光沸石的质地特性对丙烯转化过程中在350°C形成的焦炭的生长和毒性的影响。通过碱处理向一维沸石中添加晶体内中孔是一种简单的工具，可将其经典的失活模式（孔阻塞）更改为具有三维骨架的沸石更常见的中毒模式（中毒）。这种变化要求沸石具有高的分层因子，这是由于苛刻的碱性条件产生大量的晶体内中孔所致。脱硅处理去除了部分布朗斯台德酸位点，并生成了骨架外的铝物种，这些铝物种可阻止进入质子位点和/或增强其强度，从而提高了焦化率。温和的酸浸足以溶解它们。