(183a) N Self-Doped Pollen-like Macroporous Carbon for Selective Hydrogenation of 1, 3-Butadiene

The selective hydrogenation of 1,3-butadiene is an important industrial process for the purification of alkene streams and it can refer to as a model reaction for the research of selective partial hydrogenation. Pd-based catalyst is mostly used in selective hydrogenation. However, it is a tough issue to improve selectivity of butenes. Pd/C is one of the important catalysts in the reaction of selective hydrogenation. And, the C support plays an important role in the improvement of the selectivity. The biomass-derived N self-doped carbon possesses a great application prospect because of its great advantage in economic and ecological aspect. Hence in this work, rape pollen was selected as the biotemplate to prepare macroporous carbons via simple carbonization process, due to the uniform particle size, rich pore structure, thermal stability and mechanical strength. The obtained N-doped macroporous carbon owned the similar morphology with rape pollen, and exhibited higher defects, more pyridinic nitrogen and graphitic nitrogen. Furthermore, Pd particles were immobilized on the N-doped macroporous carbon through an adsorption-reduction method. The catalytic performance of as-synthesized Pd/pollen-C towards selective hydrogenation of 1, 3-butadiene was investigated, it showed better butenes selectivity of 95% at 80 ^oC than Pd/commercial activated carbon, due to N dopant and unique macroporous structure.We suppose that the pollen-C is promising for wider application in other catalysis reactions owing to the special properties, and the method of reducing interactions between Pd and carbon support will be a reference for improving selectivity in selective hydrogenation.