| 학회 |
한국화학공학회 |
| 학술대회 |
2022년 봄 (04/20 ~ 04/23, 제주국제컨벤션센터) |
| 권호 |
28권 1호, p.433 |
| 발표분야 |
[주제 7] 수소 |
| 제목 |
Oxygen-vacancy-involving reaction routes over CexZr1-XO2-based catalysts for ethanol steam reforming: lattice-structure-dependent catalytic behavior on hydrogen production |
| 초록 |
In this study, to understand lattice-structure-dependent catalytic behavior occurring over oxygen vacant sites in ethanol steam reforming (ESR), two types of the CexZr1-xO2 solid solutions were synthesized by a citrate complex method and subsequently used as a support for preparing Ni/CexZr1-xO2 catalysts. The Ce-rich cubic catalyst(CZ) contained higher oxygen vacancy not only on the surface but also in the bulk structure than the Zr-rich tetragonal catalyst(ZC). When Ni species was impregnated into the supports, the oxygen vacancy on the metal-support interfacial regions was enhanced by the metal-support interaction. Active oxygen species generated on oxygen vacancy via steam activation simultaneously involved steam reforming, water gas shift reaction, and ethylene oxidation. The lack of oxygen vacancy over ZC limited reaction routes for the active oxygen species, which was temperature-dependent behavior; EO was limited at 550 ℃ and WGS at 750 ℃. With the Ni impregnation, the lattice-structure-dependent catalytic behavior over CexZr1-xO2 remained unchanged, SR on Ni was strongly enhanced, resulting in the highest H2 production of 1112.2 μmol/g•min for the Ni/CZ catalyst. |
| 저자 |
왕명연1, 김상윤2, Nguyen Phuong Anh2, HOANG THI VAN ANH2, Azam Jamsaz3, 신은우3
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| 소속 |
1울산대, 2Univ. of ulsan, 3Univ. of Ulsan |
| 키워드 |
촉매(Catalyst) |
| E-Mail |
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| 원문파일 |
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