CuO/ZnO/ZrO₂-ZSM-5 fibrillar bifunctional catalysts, with a mean diameter of 1.5 μm, were prepared in flexible non-woven mats. The use of electrospinning technique allowed obtaining, in only one step, both a high Cu dispersion on the surface of the ZrO₂ fibers and well-dispersed zeolite aggregates, with a mean size of 300 nm, decorating the CuO/ZnO/ZrO₂ fiber surfaces. These fibers, without further modifications, were very efficient as catalysts for the direct synthesis of DME from syngas in a packed-bed reactor (low pressure drop and enhanced mass and heat transfer). The catalytic activity was well-correlated with the physicochemical properties of the catalysts. The enhanced interaction between the two active phases involved in the direct syngas-to-DME process gave rise to high CO conversions and selectivity to DME values, even when working with a syngas presenting a low H₂/CO ratio, such as that obtained from biomass gasification.

在柔性非织造垫中制备了平均直径为1.5μm的CuO / ZnO / ZrO ₂ -ZSM-5原纤维双功能催化剂。使用静电纺丝技术仅需一步即可在ZrO ₂纤维的表面上获得高的Cu分散度以及平均粒径为300 nm的分散良好的沸石聚集体，从而装饰CuO / ZnO / ZrO ₂纤维表面。这些纤维，未经进一步修饰，作为在填充床反应器中由合成气直接合成DME的催化剂非常有效（低压降，增强的传质和传热）。催化活性与催化剂的理化性质密切相关。直接合成气制DME过程中涉及的两个活性相之间增强的相互作用导致高的CO转化率和对DME值的选择性，即使使用表现出低H ₂ / CO比的合成气，例如生物质气化。