Article
Materials Science, Ceramics
Moyu Liao, Hang Qin, Wenming Guo, Pengzhao Gao, Hanning Xiao
Summary: A hydrophilic polyacrylic acid hydrogel was used to prepare a porous reticular CuO/ZnO/CeO2/ZrO2 catalyst on Al2O3 foam ceramic, showing high methanol conversion rate and hydrogen yield after calcination at 500 degrees C.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Chenxu Guo, Hanning Xiao, Wenming Guo, Tingting Bao, Jiawei Xie, Hang Qin, Pengzhao Gao
Summary: CuO-ZnO-CeO2 catalysts were prepared on Al2O3/cordierite monolith through sol-gel combustion method, and the effects of combustion temperature on the properties and performance of the catalysts were investigated. The catalyst (CZC-400) prepared at 400 degrees C showed uniform distribution on the monolith with smaller particle size (4.2 nm) and higher surface area (23.7 m(2) g(-1)). In methanol steam reforming, CZC-400 exhibited 100% methanol conversion at 260 degrees C without by-product CO, and maintained excellent catalytic activity and stability for 32 hours.
CERAMICS INTERNATIONAL
(2023)
Article
Energy & Fuels
Xiangkun Jia, Huan Zhang, Biying Ren, Jun Xie, Peng Ge, Baoliang Zhang
Summary: Four copper-based catalysts were prepared and characterized to investigate the effects of different components on catalyst activity. The performance of these catalysts for methanol steam reforming was evaluated, and the factors such as components, reaction temperature, and gas hourly space velocity were studied. The results showed that 1# and 2# catalysts exhibited higher catalytic activity and stability, achieving high methanol conversion rate and selectivity, as well as faster hydrogen production speed. This study provided an effective method for the preparation of catalysts for methanol steam reforming.
JOURNAL OF THE ENERGY INSTITUTE
(2023)
Article
Materials Science, Ceramics
Chenxu Guo, Miao Li, Wenming Guo, Hang Qin, Moyu Liao, Pengzhao Gao, Li Ni, Yang Zhou, Hanning Xiao
Summary: In this study, a porous CeO2-based nanosheet array was grown on the surface of cordierite honeycomb ceramic via hydrothermal approach. This structured catalyst, decorated with CuO-ZnO catalysts, exhibited excellent catalytic activity and durability, making it a potential choice for hydrogen production in autonomous vehicles.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Yue Chen, Shantong Li, Shuyi Lv, Yongmin Huang
Summary: The CuO-CeO2 catalyst prepared by pyrolysis of self-assembled HKUST-1-CeO2 composite showed remarkable performance under high gas hourly space velocity, achieving high H-2 production rate and low CO selectivity. The high dispersion of active metal facilitated oxygen species spillover, contributing to the excellent catalytic behavior.
CATALYSIS COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Shiqing Jin, Didi Li, Zhen Wang, Yiming Wang, Li Sun, Minghui Zhu
Summary: Cu/CeO2 catalysts prepared by a deposition-precipitation method with various loadings were investigated using in situ characterization techniques. The catalyst surface contains metallic Cu-0 and interfacial sites, with the latter being the key active sites for the methanol steam reforming reaction. Furthermore, the structures of both sites change dynamically in response to different environmental conditions.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Energy & Fuels
Yancheng Wang, Qiong Wu, Deqing Mei, Yidong Wang
Summary: A new methanol fuel processing system (MFPS) has been developed to produce CO-free hydrogen rich steam for the supply of PEMFC, generating approximately 100 watts of electricity successfully.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Haiguang Wang, Yongfeng Liu, Jun Zhang
Summary: CuO/ZnO/Al2O3 catalysts were prepared using an oxalate precursor via co-precipitation method. Ethanol was found to influence the crystalline phase composition of the oxalate precursor. Microwave irradiation promoted isomorphous substitution between Cu2+ and Zn2+, forming the master phase (Cu,Zn)C2O4. After calcination, a solid solution Cu-O-Zn with nano-fibriform morphology was formed. The catalyst exhibited small CuO grains, a large surface area, and strong synergistic effects between CuO and ZnO, which improved the catalytic performance of methanol steam reforming.
Article
Energy & Fuels
Qiong Wu, Deqing Mei, Xingye Qiu, Yancheng Wang
Summary: This study proposes a multilevel series scaled-up methanol steam reforming microreactor to improve the hydrogen production rate. Experimental results show that the developed microreactor can significantly improve the hydrogen production rate and temperature distribution uniformity, indicating a potential application in high hydrogen consumption equipment.
Article
Chemistry, Physical
Shupan Zhou, Yuchen Zhong, Weiming Lin, Huihui You, Xinying Li, Linjing Wu, Wei Zhou
Summary: A novel flexible tubular microreactor was designed using a corrugated shell and a high porosity porous copper fiber rod as catalyst support, aiming to be potentially used in constrained space. The influence of placement position, bending direction, and bending angle on the reaction performance of the microreactor was investigated. The results showed that the placement position and bending direction significantly affected the reaction performance, while the reaction performance decreased with increasing bending angle.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Tianqing Zheng, Dongjie Zhou, Youji Zhan, Yongchao Xu
Summary: By optimizing the integration design of the self-thermal methanol steam reforming microreactor, the hydrogen production capability can be enhanced, resulting in increased methanol conversion rate and hydrogen yield.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Chemical
Moyu Liao, Hang Qin, Wenming Guo, Pengzhao Gao, Hanning Xiao
Summary: A CuO/ZnO/CeO2/ZrO2 catalyst slurry was prepared by mixing the catalyst powder, a polyvinyl alcohol aqueous solution, and glycerol. The catalyst was in situ reduced by glycerol during the loading process, leading to the integration of catalyst loading and reduction. The prepared catalyst showed excellent performance in methanol steam reforming with a high methanol conversion rate and hydrogen yield.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Thermodynamics
Qiong Wu, Yancheng Wang, Haonan Zhou, Xingye Qiu, Deqing Mei
Summary: This article introduces a visible methanol steam reforming microreactor, which uses an optical crystal as an observation window and measures the reaction temperature in real-time using infrared thermography. The results show that under lower oxygen to carbon ratio conditions, the microreactor has a higher heating rate and a stable gradient in temperature distribution.
APPLIED THERMAL ENGINEERING
(2024)
Article
Chemistry, Physical
Orhan Ozcan, Ayse Nilgun Akin
Summary: This study investigates the kinetics of methanol steam reforming (MSR) using a commercial catalyst (CuO/ZnO/Al2O3) in a once-through flow reactor. The effects of methanol and water partial pressures on the reaction rate were examined. A power rate law was utilized to describe the experimental data, and a non-linear regression analysis revealed reaction orders of 0.29 for methanol and 0.09 for water, with a frequency factor of 53.48 (molCH3OH s-1 gcatalyst-1 kPa-0.38) and an activation energy of 65.59 kJ mol-1. Additionally, a simulation study was conducted to analyze the rate equation of an integrated system, which showed the potential to produce 15 W power output.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Tong Jiao, Xue-lian Xu, Lei Zhang, You-yun Weng, Yu-bing Weng, Zhi-xian Gao
Summary: Hydrogen proton exchange membrane fuel cell is considered a clean and efficient way of utilizing hydrogen energy, but high storage and transportation costs hinder its development. On-site hydrogen production from methanol steam reforming can solve this issue, and monolithic catalysts show better activity in high space velocity methanol steam reforming reactions.
ACTA CHIMICA SINICA
(2021)
Article
Chemistry, Multidisciplinary
Jiawei Xie, Limin Tang, Songtao Lv, Naitian Zhang, Tuo Huang, Hongfu Liu
APPLIED SCIENCES-BASEL
(2018)
Article
Construction & Building Technology
Limin Tang, Yue Xiao, Jiawei Xie
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Chemistry, Physical
Yue Xiao, Limin Tang, Jiawei Xie
Summary: In this study, the calculation method for permanent deformation of asphalt mixture based on interval analysis theory is proposed to simplify the road design process. By expressing data with uncertain size as intervals, an interval calculation formula is derived, leading to accurate and reliable results.
Article
Materials Science, Ceramics
Lijuan Huang, Hang Qin, Tianci Hu, Jiawei Xie, Wenming Guo, Pengzhao Gao, Hanning Xiao
Summary: By optimizing the preparation process, the multilayer microstructures, mechanical properties, and filtering performances of freeze-casting SiC ceramic membranes can be controlled. Increasing the solid content narrows the directional pore channels and improves mechanical properties, while increasing coarse particle content thickens separation layers and transition layers to enhance permeability efficiency.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Jiawei Xie, Jingjing Ma, Moyu Liao, Wenming Guo, Lijuan Huang, Pengzhao Gao, Hanning Xiao
Summary: This study successfully constructed 3D-SiC network skeleton with different structures and fabricated SiC/Al composites with 3D-interpenetrated network structure, demonstrating high thermal conductivity and flexural strength.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Jiawei Xie, Shuang Wang, Chenxu Guo, Hang Qin, Pengzhao Gao, Jingxiong Liu, Wenming Guo, Hanning Xiao
Summary: A robust 3D-SiC network skeleton was constructed through phase transformation and mutual interactions, and SiC/Al composites were manufactured for electronic packaging. The composites exhibited excellent properties, including high thermal conductivity, low coefficient of thermal expansion, and high flexural strength, as well as exceptional thermal stability. This technique provides a new approach to design and synthesize SiC/Al composites with scalable and tunable properties.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Electrical & Electronic
Shuang Wang, Hang Qin, Chaoyang Cai, Jiawei Xie, Wenming Guo, Pengzhao Gao, Wen Xie, Hanning Xiao
Summary: BaCu2-xMnxSi2O7 microwave dielectric ceramics were synthesized, and the effects of Mn2+ substitution for Cu2+ on the phase composition, crystal structure, and microwave dielectric properties were investigated. The results showed that the dielectric constant of the ceramics exhibited an increasing and then decreasing trend with increasing Mn2+ doping content, while the change in Q(f) was related to the porosity and total lattice energy.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Nanoscience & Nanotechnology
Hang-bo Zheng, Yuan-li Wang, Jia-wei Xie, Peng-zhao Gao, Dong-yun Li, Evgeny Rebrov, Hang Qin, Xiao-pan Liu, Han-ning Xiao
Summary: This study reports a ferromagnetic ordered electrocatalyst that can act as a heater and a spin polarizer under an AC magnetic field, significantly enhancing alkaline oxygen evolution reaction (OER). This effect is superior to other types of electrocatalysts and has an immediate heating effect with minimal impact on the temperature of the electrolytic cell. Additionally, the spin pinning effect at the ferromagnetic/paramagnetic interface and the introduction of an external magnetic field further improve the reaction efficiency. This research provides a reference for the design of high-performance OER electrocatalysts under a magnetic field.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Ceramics
Cangbao Liu, Chaoyang Cai, Jiawei Xie, Wenming Guo, Hang Qin, Pengzhao Gao, Hanning Xiao
Summary: The effect of surface brittle-to-ductile transition (BDT) on the high-temperature thermal shock resistance (TSR) of Al2O3 ceramics was investigated. The BDT temperature was found to be around 1000°C and was associated with the softening of the grain boundary glass phase. The appearance of surface BDT during the high-temperature thermal shock process improved the residual strength of specimens.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Hui Zhou, Jiawei Xie, Feiyang Yan, Wenming Guo, Pengzhao Gao, Hang Qin, Hanning Xiao
Summary: A novel Al2O3 ceramic membrane modified by cobweb-bridged WO3 nanowires was successfully fabricated for the separation of oil/water emulsions. The modified membrane exhibited high separation efficiency, high permeation fluxes, and excellent chemical stability.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Jiawei Xie, Hang Qin, Hangbo Zheng, Chaoyang Cai, Jingxiong Liu, Pengzhao Gao, Wenming Guo, Hanning Xiao
Summary: Electronic packaging materials should possess excellent overall performance in thermal, mechanical, and machinability to meet the challenges of the highly integrated development of the electronics industry. Low-temperature sintering of high-strength 3D-SiC frameworks and fabrication of 3D-interpenetrated network structures SiC/Al composites were achieved. Increasing coarse powder size improved the thermal conductivity, coefficient of thermal expansion, and thermal deformation parameter of the composites, but further increasing coarse powder size reduced the mechanical properties. The composites maintained stable thermal conductivity and coefficient of thermal expansion after 100 thermal cycles, ensuring long-term service reliability.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Coatings & Films
Jingjing Ma, Chaoyang Cai, Jiawei Xie, Wenming Guo, Hang Qin, Jingxiong Liu, Wen Xie, Pengzhao Gao, Hanning Xiao
Summary: A low coefficient of thermal expansion (CTE) coating was developed to improve the oxidation resistance of SiC. The coating, composed of LiAlSiO4 and Al2O3, exhibited favorable hydrophobicity, appropriate CTE, and high flexural strength. The experimental results demonstrated that the coating not only enhanced the oxidation resistance of SiC, but also maintained the high strength of the coated SiC.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Chenxu Guo, Hanning Xiao, Wenming Guo, Tingting Bao, Jiawei Xie, Hang Qin, Pengzhao Gao
Summary: CuO-ZnO-CeO2 catalysts were prepared on Al2O3/cordierite monolith through sol-gel combustion method, and the effects of combustion temperature on the properties and performance of the catalysts were investigated. The catalyst (CZC-400) prepared at 400 degrees C showed uniform distribution on the monolith with smaller particle size (4.2 nm) and higher surface area (23.7 m(2) g(-1)). In methanol steam reforming, CZC-400 exhibited 100% methanol conversion at 260 degrees C without by-product CO, and maintained excellent catalytic activity and stability for 32 hours.
CERAMICS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Hang -bo Zheng, Yuan-li Wang, Jia-wei Xie, Peng-zhao Gao, Dong-yun Li, Evgeny Rebrov, Hang Qin, Xiao-pan Liu, Han-ning Xiao
Summary: In this study, it was found that a ferromagnetic ordered electrocatalyst can act as both a heater and a spin polarizer, leading to significant enhancement of alkaline oxygen evolution reaction under an AC magnetic field. This work provides a reference for the design of high-performance electrocatalysts for oxygen evolution reaction under a magnetic field.
ACS APPLIED MATERIALS & INTERFACES
(2022)
