Catalysts
·
2025
·Vol. 15
·期 6
·530
·
IF 4
Yalin Guo,Zhuang Ma,Binbin Jin,Limin Ma,Guodong Yao
The sustainable valorization of lignocellulosic biomass into high-value platform chemicals presents a crucial pathway for reducing reliance on fossil resources. Gamma (γ)-valerolactone (GVL) has gained recognition as a versatile bio-derived compound with broad applications in renewable energy systems and green chemical synthesis. While conventional GVL production strategies from carbohydrate biomass typically depend on noble metal catalysts paired with high-pressure hydrogen gas, these approaches face substantial technical barriers including catalyst costs, hydrogen storage requirements, and operational safety concerns in large-scale applications. This work develops an innovative catalytic system utilizing earth-abundant iron for in situ hydrogen generation through water splitting, integrated with Raney Ni as the hydrogenation catalyst. The designed two-stage process enables direct conversion of cellulose—first through acid hydrolysis to levulinic acid (LA) followed by catalytic hydrogenation to GVL without intermediate purification. Through systematic parameter optimization, a remarkable 61.9% overall GVL yield from cellulose feedstock was achieved. Furthermore, the methodology’s versatility was demonstrated through wheat straw conversion experiments, yielding 24.6% GVL. This integrated methodology explores a technically feasible pathway for direct cellulose-to-GVL conversion utilizing abundant water as the hydrogen source, effectively overcoming the critical limitations associated with conventional hydrogenation technologies regarding hydrogen infrastructure and process safety.
研究领域:
生物化学
·
可再生能源
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Energy Technology
·
2018
·Vol. 7
·期 3
·1800533
·
IF 3.175
Shiliang Zhang,Qilu Yao,Qingyang Li,Gang Feng,Zhang-Hui Lu
The synthesis of noble-metal-free recyclable catalysts with prominent catalytic performance for the complete hydrogen production from hydrazine borane (N 2 H 4 BH 3 , HB) is of great significance in achieving a hydrogen economy-based society. Herein, Raney Ni is synthesized using a rapidly quenched aluminum–nickel alloy under a typical alkali leaching condition and is used to catalytically convert hydrogen of N 2 H 4 BH 3 to H 2 via hydrolyzing BH 3 groups and decomposing the N 2 H 4 moiety in alkaline conditions. It is the first report of a noble-metal-free catalyst achieving a complete production of hydrogen from N 2 H 4 BH 3 at room temperature. This noble-metal-free catalyst might tremendously broaden the actual utilization of HB as a promising chemical hydrogen storage material. In addition, such a simple strategy can also be expanded to design and synthesize other porous metals for more applications.
研究领域:
能源化学
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催化化学
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材料科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2015
·
IF 3.313
Lei Wang,Pengjin Ye,Fang Yuan,Shuzhen Li,Zixin Ye
In this work, we report a novel means, named liquid phase in-situ hydrodeoxygenation of bio-derived phenol to cyclohexene and cyclohexane over Raney Ni and Nafion/SiO 2 . In this method, producing hydrogen , hydrogenation and dehydration are merged and coupled owing to the close reaction conditions. The overall specific reaction pathway was studied and influences of Nafion loading, temperature, H 2 O/MeOH ratio and the quantity of catalysts on the reaction were also researched. In terms of 3 g phenol, the suitable operating conditions are drawn as follows: the Nafion loading 13 wt%, the reaction temperature 200 °C, H 2 O/MeOH ratio 20 mL:15 mL, Raney Ni 1 g, Nafion/SiO 2 0.3 g. The conversion rate of phenol and the total yield of cyclohexene and cyclohexane can reach respectively 100% and 87%. The whole reaction system is performed in the liquid phase using in situ hydrogen produced from methanol aqueous-phase reforming, not requiring an external source of hydrogen. The operating conditions are gentle, and the cost is considerably reduced.
研究领域:
化学工程
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催化反应
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2023
·
IF 5.5
Zhecheng Fang,Haoan Fan,Xuezhi Zhao,Gaobo Lin,Bolong Li,Jianghao Wang,Xiuyang Lu,Wulong Yang,Mian Li,Weiyu Song,Jie Fu
Glucose hydrogenation to sorbitol is a vital industrial reaction for the utilization of biomass. Generally, hydrogenation is catalyzed by the inexpensive Raney Ni catalyst which has good catalytic but suffers from poor stability and side reaction，and the mechanisms of glucose hydrogenation on Raney Ni surfaces is also unclear. This study combines density functional theory calculations, ab initio molecular dynamics simulations (AIMD), and experiments to reveal the nature of glucose hydrogenation on the (111), (200), and (220) surfaces of Ni catalyst. The DFT calculation results show that the (111) and (200) surfaces of Raney Ni are favorable for hydrogenation with 111-η2, 200-η2–1, 200-η2–3 adsorption configurations and adsorption energy is closely related to the rate-determining step. Furthermore, in-situ IR analysis and AIMD calculation confirm the existence of 111-η2 structure in hydrogenation, while electronic analysis demonstrates that improving the alignment of the nickel surface's d orbitals with the -C O bond's π orbitals can enhance both the adsorption and catalytic hydrogenation activity. In addition, the (220) surface is found to be responsible for the dehydrogenation of cyclic-glucose, and decreasing the percentage of the (220) surface and increasing the reaction temperature appropriately may be effective in inhibiting the side reaction. This paper not only reveals the nature of Raney Ni catalyzed glucose hydrogenation but also lights the direction for the design of highly efficient nickel-based catalysts.
研究领域:
化学工程
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催化科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Lei Zuo,Junfeng Wang,Deqing Mei,Derick Adu-Mensah,Yaping Gao
The amounts of methyl stearate (C18:0) and trans-methyl oleate (trans-C18:1) increase during the catalytic transfer hydrogenation (CTH) process of biodiesel. Although it could improve the oxidation stability of biodiesel, its low temperature performance would be worsened. As for it, ultrasonic was introduced in the CTH to control the generation of C18:0 and trans-C18:1. In this study, the ultrasonic-assisted CTH was performed using Raney-Ni as catalyst, isopropanol as hydrogen donor and water as solvent. The effect of operating parameters such as reaction temperature, stirring rate, catalyst dosage, isopropanol amount and water amount on hydrogenation process was investigated. It was revealed that the optimum reaction conditions were determined as reaction temperature 80 °C, stirring rate 600 rpm, catalyst dosage 10 wt%, isopropanol amount 32 g and water amount 100 g in the aspect of the iodine value of bioidesel and the yield of C18:0 and trans-C18:1. The process of the ultrasonic-assisted CTH for biodiesel could be well described by pseudo-first order kinetic model. The conversion rate constants from C18:2 to C18:1 ( k 1 ) and from C18:1 to C18:0 ( k 2 ) were 0.02649 min −1 and 0.00438 min −1 , respectively. Ultrasonic field effectively repressed the selectivity of trans-C18:1 and further decreased the iodine value of biodiesel. On the basis of the same iodine value, the yield of C18:0 and hydrogenation time reduced with ultrasonic. Overall, ultrasonic is an effective intensification method for the CTH of biodiesel in the aspect of product selectivity and reaction rate.
研究领域:
化学工程
·
可再生能源
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2015
·
IF 2.352
Feifei Sun,Yue An,Lecheng Lei,Fuying Wu,Jingke Zhu,Xingwang Zhang
Hydrogenation of carbazole and N-ethylcarbazole over Raney-Ni catalyst were realized in the temperature range of 393–503 K. 4[H] adduct dominated the hydrogenation products and the formation of 2[H] adduct was the rate-limiting step during the period, in which the conversion of carbazole was less than 40%. The hydrogenation process followed pseudo-first-order kinetics and the hydrogenation activation energies of carbazole and N-ethylcarbazole were 90 kJ/mol and 115 kJ/mol, respectively. The reaction starting position as well as the pathway of the hydrogenation of (N-ethyl)carbazole were investigated by comparing the kinetic characteristics of hydrogen uptake of carbazole and N-ethylcarbazole. The results showed that the reaction was a stepwise hydrogenation process and the first H 2 was added to the C1 = C10 double bond in the hydrogenation.
研究领域:
化学工程
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2013
·
IF 1.304
Likun Zhou,Jifeng Pang,Aiqin Wang,Tao Zhang
Jerusalem artichoke stalk (JAS) was employed as the feedstock for the production of ethylene glycol (EG) with a combined catalyst comprising commercial WO 3 and Raney Ni. The raw JAS contains 51.6 wt% cellulose, 10.3 wt% hemicellulose, 17.2 wt% lignin, 1.7 wt% ash, and 19.2 wt% water-soluble substances. It was found that the lignin component in the JAS had little effect on the conversion of hemicellulose while the water-soluble substances caused a negative effect, which led to an EG yield of only 29.9%. After a simple hot water pretreatment, most of the water-soluble substances were removed, and the EG yield was increased to 37.6%. Moreover, the hot water pretreatment also led to an improvement in the durability of the catalyst. The effects of reaction temperature and reaction duration were also investigated.
研究领域:
生物质能
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催化化学
✓ 已验证
DOI
高影响因子
Catalysts
·
2024
·Vol. 14
·期 5
·296
·
IF 3.8
Tianshui Li,Wei Liu,Huijun Xin,Qihao Sha,Haijun Xu,Yun Kuang,Xiaoming Sun
Water electrolysis is a crucial technology in the production of hydrogen energy. Due to the escalating industrial demand for green hydrogen, the required electrode size for a traditional alkaline water electrolyzer has been increasing. Numerous studies have focused on developing highly active oxygen evolution reaction (OER) catalysts for water electrolysis. However, there remains a significant gap between the microscale synthesis of catalysts in laboratory settings and the macroscale preparation required for industrial scenarios. This challenge is particularly pronounced in the synthesis of sizable self-supported electrodes. In this work, we employed a commercially available Raney Ni-coated Ni mesh as a precursor material to fabricate a self-supported NiFe(OH)x@Raney Ni anode with a substantial dimension exceeding 300 mm through a straightforward immersion technique. The as-prepared electrode exhibited remarkable electrocatalytic OER activity, as an overpotential of only 240 mV is required to achieve 10 mA cm−2. This performance is comparable to that of NiFe-LDHs synthesized via a hydrothermal method, which is difficult to scale up for industrial applications. Furthermore, the electrode demonstrated exceptional durability, maintaining stable operation for over 100 h at a current density of 500 mA cm−2. The large-scale electrode displayed consistent overpotentials across various areas, indicating uniform catalytic activity. When integrated into an alkaline water electrolysis device, it delivered an average cell voltage of 1.80 V at 200 mA cm−2and achieved a direct current hydrogen production energy consumption as low as 4.3 kWh/Nm3. These findings underline the suitability of electrodes for industrial scale applications, offering a promising alternative for energy-efficient hydrogen production.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2015
·
IF 2.79
Yetao Jiang,Zheng Li,Xing Tang,Yong Sun,Xianhai Zeng,Shijie Liu,Lu Lin
In the present study, cellulolytic enzyme lignin, which was isolated from enzymatic hydrolysis residues of bamboo, could be efficiently depolymerized into oily products with a yield of over 60 wt % using a range of acidic zeolites and/or Raney Ni catalysts. The degraded products are mainly composed of phenolic monomers, which can be used as versatile chemicals or the precursor for biofuel production. The yields of monophenols were 12.9 wt % and no more than 5.0 wt % when catalyzed by Raney Ni or acidic zeolites, respectively. However, a yield of monophenols as high as 21.0–27.9% was obtained using a Raney Ni combination with acidic zeolite catalysts. Matrix-assisted laser desorption ionization time-of-flight mass spectrometry analysis revealed that the depolymerization level of the oily fraction catalyzed by a combination of catalysts was more complete in comparison to those catalyzed by an independent catalyst. The results indicated that the catalytic activity of a fully heterogeneous catalyst combination for the depolymerization of cellulolytic enzyme lignin was proven to be superior to that of either component alone.
研究领域:
生物化学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
ChemCatChem
·
2019
·Vol. 11
·期 11
·2649-2656
·
IF 4.495
Kuo Zhou,Haiyan Liu,Huimin Shu,Shuwen Xiao,Dechao Guo,Yingxin Liu,Zuojun Wei,Xiaonian Li
Graphical Raney to the rescue ! High value-added 2,5-bisaminomethylfuran was one-pot synthesized from 5-HMF over Raney Ni with a yield of 60.7 %. DFT calculations were conducted to support our speculation that Ni can harmonize NH 3 and H 2 on its surface most suitably for the reductive amination reactions. Reductive amination of furfuryl alcohol, furfural and 5-hydroxymethylfurfural (5-HMF) were carried out on various metal catalysts. Over Raney Ni catalyst, we obtained the highest furfurylamine yields of 81.8 % and 94.0 % from furfuryl alcohol in absence and presence of H 2 , respectively. While furfural was used as the substrate, 100 % yield of furfurylamine could be achieved over Raney Ni under rather moderate conditions. Although 5-HMF was completely converted over all catalysts used, the highest yield of 2,5-bisaminomethylfuran (60.7 %) was obtained over Raney Ni at 160 °C in 12 h. The DFT calculations on the adsorption behavior of NH 3 and H 2 on different metal surfaces showed that the difference of the adsorption energy between NH 3 and H 2 on Ni is lower than those of other metals, indicating that less metal active sites on Ni surface is occupied by NH 3 , which leaves more active sites for dehydrogenation/hydrogenation reactions and in the end promotes the reductive amination reactions.
研究领域:
化学工程
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Sciences
·
2021
·
IF 5.565
Weilai Wang,Fan Zhang,Yunfei Zhang,Lei Xu,Yuansheng Pei,Junfeng Niu
Hydrodechlorination is a promising technology for the remediation of water body contaminated with trichloroethylene (TCE). In this work, the liquid-phase hydrogenation of TCE by Raney Ni (R-Ni) and Pd/C under an open system have been studied, in which nascent H 2 (Nas-H 2 ) generated in situ from the cathode acted as a hydrogen source. Experimental results showed that TCE was completely eliminate from the solution through the synergistic effects of hydrodechlorination and air flotation due to the formation of continuous micro/nano-sized Nas-H 2 bubbles from the cathode. Furthermore, the effects of inorganic anions and organic solvents on R-Ni and Pd/C hydrogenation activity were investigated, respectively. The results showed that NO 3 − and acetonitrile can form a competitive reaction with TCE; Sulfur with lone-pair electrons will cause irreversible poisoning to these two catalysts, and have a stronger inhibitory effect on Pd/C. This work helps to realize the separation of volatile halogenated compounds from water environment and provides certain data support for the choice of catalyst in the actual liquid-phase hydrogenation system.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
AICHE JOURNAL
·
2014
·Vol. 60
·期 6
·2254-2262
·
IF 2.581
Jifeng Pang,Mingyuan Zheng,Aiqin Wang,Ruiyan Sun,Hua Wang,Yu Jiang,Tao Zhang
Miscanthus, a promising energy crop, was used for ethylene glycol (EG) production through one-pot catalytic conversion. With a binary catalyst composed of commercial tungstic acid and Raney Ni, the miscanthus with 1 % concentration was transformed into EG with a yield of 35.5%. However, the yield dropped to 13.6% as the miscanthus concentration was increased to 10 %. The underlying reason for the yield decrease was disclosed through analysis of the liquid products, investigation of pretreatments, and characterization of the catalysts. It was found that the protectors on the surface of miscanthus and the lignin component underwent decomposition under reaction conditions, resulting in the formation of some organic acids and unsaturated compounds that preferentially poisoned the Raney Ni catalyst and consequently decreased the EG yield. When the inhibitors were effectively removed by base solvent pretreatment, the EG yield was successfully improved to 39.0% even under 10% concentration of feedstock. © 2014 American Institute of Chemical Engineers AIChE J , 60: 2254–2262, 2014
研究领域:
生物能源
·
催化化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）