CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2022
·
IF 3.898
Haocui Zhang,Zhourong Xiao,Mei Yang,Jijun Zou,Guozhu Liu,Xiangwen Zhang
Ni/SBA-15 modified by highly dispersed cerium-oxide was prepared with the aid of sucrose for steam reforming of JP10 (C 10 H 16 ). Their characterization showed that addition of appropriate amount ceria led to the formation of highly dispersed CeO 2 and Ni, and the CeO 2 covered smaller nickel particles like strawberry seeds to form much more interface between them. Their catalytic activity exhibited higher stability over time on stream of 6.5 h with conversion higher than 95% and higher carbon resistance (mass loss less than 4.5% by TG), which may derive from good properties below: (1) much more interface enhanced cooperation effect and increased turnover frequency at the interface; (2) the stronger interaction between Ni and ceria to suppress sintering by formation of Ni-O-Ce solid solution; (3) the large amount of oxygen vacancies from the formation of Ni-O-Ce solid solution and highly dispersed CeO 2 to facilitate the water–gas–shift reaction and carbon removal.
研究领域:
化学工程
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Xinyu Huang,Weiting Lin,Pengyin Lu,Zhichao Zhao,Jiawei Zhong,Jun Xie,Yong Chen
Robust Ni-based nanocatalysts supported on boron nitride nanosheets (BNNS), modified by Sm 2 O 3 , were synthesized via the co-impregnation and freeze-drying methods. The optimized 8Ni-8Sm 2 O 3 /BNNS catalysts demonstrated remarkable initial catalytic activity during the combined steam and dry reforming of biogas, achieving CH 4 and CO 2 conversions of 95 % and 46 %, respectively, and maintaining stable performance for 200 h. The introduction of Sm 2 O 3 improved the amount of moderately basic sites and enhanced the activation of oxygen-containing molecules including CO 2 and H 2 O, thereby promoting the formation of reactive oxygen species (e.g., O*, OH*) and effectively removing the coke precursors, significantly enhancing the carbon resistance. Moreover, the strong interaction between the small-sized Ni nanoparticles (NPs) and the BNNS support endowed the catalysts with excellent anti-sintering performance. The satisfactory catalytic performance of the 8Ni-8Sm 2 O 3 /BNNS catalysts can be attributed to the surface oxygen vacancies generated by Sm 2 O 3 , the moderately basic sites, and interaction between the highly dispersed Ni NPs and the BNNS support.
研究领域:
催化化学
·
能源材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Qiuyan Zhu,Yifeng Liu,Xuedi Qin,Lu Liu,Zhouhong Ren,Xin Tao,Chengtao Wang,Hai Wang,Lina Li,Xi Liu,Liwei Chen,Liang Wang,Feng-Shou Xiao
Dry reforming of methane (DRM) displays a crucial role in CO 2 fixation, but the current catalysts suffer from deactivation from thermodynamically oriented coking and metal sintering. Herein, we reported a catalyst by fixing the cobalt–nickel nanoparticles within the zeolite crystals (CoNi@zeolite), where the SiO x -O-M δ+ (M = Ni or Co) linkage enhanced the reduction resistance of Co and Ni species compared with the generally supported catalysts, efficiently hindering the deep dehydrogenation of methane, which is well known as a reaction channel for coke formation. In addition, the rigid and thermally stable zeolite framework stabilized the cobalt–nickel nanoparticles to avoid their sintering during the reaction. As a result, the CoNi@zeolite catalyst exhibited a long reaction lifetime and great regenerability in a test for 980 h with reaction gas flow at 1200 L per unit mass of metal species per hour, outperforming conventionally supported metal catalysts. This work enables a proof-of-the-concept design of durable catalysts by zeolite fixation for the reactions in strongly reductive atmospheres.
研究领域:
催化化学
·
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Bin Li,Xiaoqing Yuan,Lvyin Li,Xiujun Wang,Baitao Li
Alloying nickel with a transition metal and further stabilizing an active metal on bimodal support are regarded as a promising strategy to improve carbon resistance for dry reforming of methane (DRM) reaction. In this work, a bimodal mesoporous alumina-supported Ni-Co alloy catalyst (NiCo/MMAl) was prepared via the evaporation-induced self-assembly method and employed to catalyze DRM reaction. The promotive effect of Ni-Co alloy with a bimodal porous structure on the carbon resistance was investigated. The presence of Ni-Co alloy was confirmed on porous alumina. The NiCo/MMAl catalyst possessed two porous structures, a small-sized mesopore at 10 nm and a large-sized one at 40 nm. NiCo/MMAl exhibited enhanced carbon resistance, in which only 2.3% carbon formed on the catalyst surface, lower than a unimodal mesoporous alumina-supported NiCo catalyst (NiCo/MAl, 12%) and Ni catalyst (Ni/MAl, 24%). The kinetic study suggested that on the unimodal mesoporous alumina, alloying Ni with Co increased the activation energy of CH4 dissociation (∼66 kJ/mol) compared to Ni/MAl (51.7 kJ/mol), thus showing high activity for suppressing CH4 dissociation. In addition, the large-sized mesoporous structure on NiCo/MMAl favored mass transport. As a result, the enhanced carbon resistance for NiCo/MMAl was not only attributed to the suppression of CH4 dissociation by Ni-Co alloy but also to the promotive effect of the large-sized mesopore structure on enhancing mass transport.
研究领域:
催化化学
·
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Yuanhui Shen,Yunlian Liu,Ying Pan,Hongguang Jin
Chemical looping dry reforming of methane (CL-DRM) represents an innovative CO 2 utilization technology that enables efficient conversion of CH 4 and CO 2 while producing high-quality syngas. To investigate the carbon resistance of oxygen carriers, we present a comprehensive analysis of carbon deposition mechanisms in CL-DRM from both thermodynamic and experimental perspectives, establishing a quantitative correlation between carbon deposition and oxygen carrier characteristics. Experimental validation confirmed the thermodynamic predictions. Utilizing an exsolution strategy, we successfully synthesized nano-Ni-modified iron-based perovskite, which demonstrated exceptional reactivity and carbon resistance at 800 °C. This work provides both theoretical and practical guidance for the development of advanced oxygen carriers in CL-DRM systems.
研究领域:
能源工程
·
化学工程
·
材料科学
·
环境科学
·
催化
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Biye Niu,Feixiang Gao,Zekun Jing,Taiping Fu,Yufeng Liu,Yakun Guo,Maobing Shuai
In confined environments, hydrogen accumulation presents significant safety hazards, necessitating the development of efficient hydrogen uptake materials. Conventional Pd/C-DEB hydrogen getter is severely compromised by CO poisoning. This study introduces a one-step mechanochemical ball milling approach that integrates Pd/C catalysts with DEB to fabricate a CO-tolerant hydrogen getter. A DEB conversion rate of 75.2 % is achieved under an H 2 atmosphere containing 1 % CO, representing a sixfold improvement over the untreated sample. Ball milling refines Pd nanoparticles, increases surface area, generates multiscale defects, strengthens metal-support interactions, enhances electron transfer, modulates the Pd d-band structure, and reduces CO adsorption energy, thereby exposing more active sites for hydrogen uptake. This approach is also applicable to Pt/C, Rh/C, and other platinum-group metal systems, providing a versatile strategy for designing durable and CO-resistant getters in energy storage and conversion technologies.
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2019
·Vol. 21
·期 14
·3911-3919
·
IF 9.405
Yanlong Qi,Shijun Liu,Long Cui,Quanquan Dai,Jianyun He,Wei Dong,Chenxi Bai
The synthesis of functionalized 1,3-dienes has received increasing attention due to their importance in the practical development of high-performance elastomers. In the present work, furfural and acetone, acting as renewable feedstocks, are first employed to produce a functionalized 1,3-diene containing a furan group (1-(2-furyl)-1,3-butadiene, F-diene). After selective hydrogenation of the CO group, the aldol adduct (4-(2-furanyl)-3-buten-2-ol, FAH) shows a nearly complete conversion, with an excellent selectivity (as high as 92%) towards F-diene over ceria-based catalysts in a fixed bed. BET, TEM, XRD, XPS, Raman, TPD, TPR and TGA were conducted to identify the relationship between the catalytic performance and catalyst structure. A plausible reaction pathway for the dehydration of FAH over ceria-based catalysts was proposed using a radical mechanism, which suggested the importance of the Ce4+–Ce3+ redox cycle for the dehydration of FAH to F-diene. Furthermore, the ceria-based catalysts exhibited a notable carbon resistance.
研究领域:
化学工程
·
催化
·
可再生化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）