화학공학소재연구정보센터
학회 한국화학공학회
학술대회 2022년 봄 (04/20 ~ 04/23, 제주국제컨벤션센터)
권호 28권 1호, p.263
발표분야 [주제 6] 석유화학
제목 Breaking the inverse relationship of catalytic activity–selectivity in acetylene selective hydrogenation using dynamic metal–polymer interaction
초록 The partial hydrogenation of acetylene impurities in ethylene is industrially important because acetylene acts as a catalyst poison in downstream ethylene polymerization catalysts. In this reaction, simultaneously achieving high acetylene conversion and ethylene selectivity is challenging, and most known catalysts exhibit an inverse activity–selectivity relationship. Here, an amorphous polyphenylene sulfide (Am-PPS) was synthesized as a promoter for 0.1 wt% Pd/α-Al2O3 catalyst. The modified catalyst with a trace amount of Am-PPS (0.15 wt%) showed a remarkable enhancement of ethylene selectivity without an appreciable loss in acetylene hydrogenation activity. This could be attributed to the dynamic change of the Am-PPS–Pd interface, which selectively allows the cooperative adsorption of acetylene and H2, but not ethylene. Besides, the modified catalyst exhibited excellent long-term stability due to the high stability of the polymer. These results demonstrate the unique possibility of using dynamic metal–polymer interaction to design partial hydrogenation catalysts that simultaneously exhibit high activity, selectivity, and stability.
저자 박영환, 최민기
소속 Korea Advanced Institute of Science and Technology
키워드 촉매(Catalyst)
E-Mail mkchoi@kaist.ac.kr
원문파일 초록 보기