The University of Tokyo · 공학
홍성왕 교수의 연구실은 에너지 저장 소재 및 청정 에너지 기술 분야에서 핵심 연구를 수행하고 있습니다. 주로 반도체 및 세라믹 기반의 고성능 에너지 저장 소재(예: 안티페로일렉트릭 세라믹스)와 태양열 및 수소 기반의 탄소 중립 에너지 시스템 개발에 초점을 맞추고 있으며, 탄소 포집·활용·저장(CCUS) 및 그린 수소 기반의 저탄소 시스템의 경제성과 기술적 타당성도 함께 분석하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Abstract The excellent energy‐storage performance of ceramic capacitors, such as high‐power density, fast discharge speed, and the ability to operate over a broad temperature range, gives rise to their wide applications in different energy‐storage devices. In this work, the (Pb 0.98 La 0.02 )(Zr 0.55 Sn 0.45 ) 0.995 O 3 (PLZS) antiferroelectric (AFE) ceramics are prepared via a unique rolling machine approach. The field‐induced multiphase transitions are observed in polarization–electric field (
Nine one-dimensional (1D) lanthanide(III) coordination polymers with the formulas {[La(pta)(H2O)4]·2H2O}n (1), {[Ln(pta)(H2O)5]·4H2O}n [Ln = Sm (2), Eu (3), Tb (4), Ho (5)], and {[Ln(pta)(H2O)3]·4H2O}n [Ln = Dy (6), Er (7), Tm (8), Yb (9)] (H3pta = 2,4,6-pyridinetricarboxylic acid) have been synthesized by reacting the corresponding rare earth salts with H3pta at room temperature. The X-ray structure analyses show three kinds of 1D chain structures. Complexes 2−5 and 6−9 are isostructural, respe
The combination of methane steam reforming technology and CCS (Carbon Capture and Storage) technology has great potential to reduce carbon emissions in the process of hydrogen production. Different from the traditional idea of capturing CO2 (Carbon Dioxide) in the exhaust gas with high work consumption, this study simultaneously focuses on CO2 separation from fuel gas and recycling. A new hydrogen production system is developed by methane steam reforming coupled with carbon capture. Separated an
Thermodynamic analysis is performed on a conceptual oxygen permeation membrane reactor driven by concentrated solar energy (heat) for isothermal H2O splitting for the purpose of solar fuel derivation. By way of a plug-flow reactor model, kinetic and thermodynamic factors responsible for conversion rate, reactor dimension, and solar-to-fuel efficiency are analyzed for the case of pump-assisted and methane-assisted scenarios. The pump-assisted case achieves the same solar-to-fuel efficiency (2.9%
• Six low/zero carbon emission systems coupled with green H 2 or CCUS are proposed. • Photovoltaic price/carbon tax impact on the system competitiveness is evaluated. • High concentration-CCUS coupled with PV-electric boiler is more effective currently. • Photovoltaic-green H 2 scheme has a strong dependence on electricity/hydrogen storage. • CCUS based zero carbon system can be competitive when carbon tax > 234.7 yuan/t CO 2. Direct coal liquefaction can directly transform solid coal into high-
Novolac/layered silicate nanocomposites were synthesized by condensation polymerization of phenol and formaldehyde catalyzed by H-montmorillonite (H-MMT). Exfoliation of the clay was investigated by X-ray diffraction and transmission electron microscopy (TEM). It turned out that the intra-gallery condensation of phenol and formaldehyde played a predominant role in the exfoliation of MMT. Exfoliated clay plates with interlayer spacings of 10–30 nm were dispersed in the matrix uniformly as shown b
