GREEN CHEMISTRY
·
2019
·Vol. 21
·期 16
·4434-4442
·
IF 9.405
Teng Li,Shengqin Liu,Bing Wang,Jingen Long,Jun Jiang,Ping Jin,Yao Fu,Haizhu Yu,Weiran Yang
Glycerol, generated in abundance as the by-product in the process of biodiesel production and saponification, has seen attempts to convert it into value-added chemicals. However, due to the low selectivity of hydrogenolysis of the secondary hydroxyl group, valuable 1,3-substituted chemicals are difficult to obtain from glycerol by chemocatalysis. In this work, glyceric acid (GA), a renewable biomass from glycerol, was quantitatively converted to 3-iodopropionic acid (3-IPA) at 373 K in 3 h by hydroiodic acid mediated hydrogenation. As the reductant in this process, HI is oxidized to I2 and then regenerated in situ by metal catalysts and H2. The reaction pathway was proposed by intermediate identification and verified by a kinetics study and computational method. The catalytic system was shown to be stable and can be reused several times without loss in activity. As a 1,3-substituted chemical, 3-IPA is not only a potential monomer to form poly-3-hydroxypropionic acid, but also a good platform molecule to produce useful chemicals, e.g. 3-hydroxypropionic acid (3-HPA) and acrylic acid (AA), due to its highly reactive nature.
研究领域:
化学工程
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可再生资源化学
·
有机合成
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Teng Li,Ping Jin,Yekai Zhang,Kexin Huang,Jingen Long,Jun Jiang,Shengqin Liu,Ayusman Sen,Weiran Yang
As an important biomass-derived chemical, d-sorbitol can be converted to a variety of useful chemicals and fuels. Because of the strong nucleophilicity of I– and reducibility of hydrogen iodide (HI), hydroiodic acid has been used for polyol hydrogenolysis with high selectivity. Here, d-sorbitol was converted by HI, rhodium, and hydrogen to give a high yield of iodohexanes (94.2%) at 373 K in a water/cyclohexane biphasic system. Rhodium and hydrogen were used to regenerate HI in situ. The reaction mechanism was studied in detail by using model molecules. The substitution–elimination–addition (SEA) mechanism was proven to be the most possible pathway. The high concentration of both proton and iodide was found to be necessary for the efficient conversion of d-sorbitol and the selective formation of iodohexanes. Besides, water could inhibit the conversion of d-sorbitol dramatically. These findings were explained by kinetic study and demonstrated in the reaction kinetic equation. This catalytic system, including HI and RhCl3, was proven to be reusable. In addition, iodohexanes can be quantitatively converted to hexenes over ZrO2 at 473 K.
研究领域:
化学工程
·
生物质转化
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产品关联
DOI
高影响因子
FUEL PROCESSING TECHNOLOGY
·
2014
·
IF 3.019
Dong-Can Lv,Yun-Quan Liu,Shui-Rong Li,Yue-Yuan Ye,Duo Wang
In this work, direct production of heavier hydrocarbons from biomass-derived xylitol by reduction with hydroiodic acid (HI) in the presence of phosphorous acid (H 3 PO 3 ) was studied. The effects of the feed ratio of raw materials, mixing intensity, and reaction time on catalytic performance were investigated by experiments. It was found that the molar ratio of xylitol/HI and H 2 O/HI had significant effects on the conversion of xylitol and yield of hydrocarbons. A maximum yield of 80.3% for hydrocarbons was achieved at a xylitol/HI/H 3 PO 3 /H 2 O molar ratio of 0.4:1:2:12, a mixing intensity of 800 rpm, and a reaction time of 12 h. High performance liquid chromatography (HPLC) and gas chromatograph/mass spectrometer (GC/MS) were used to determine the amount of xylitol and to analyze the composition of hydrocarbon products, respectively. The hydrocarbons obtained are mainly C 10 and C 15 hydrocarbons with aromatic rings , which have a high heating value of 43 kJ/g, making them suitable for diesel or/and jet fuel substitutes.
研究领域:
生物化学
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可再生能源
✓ 已验证
DOI
高影响因子
CATALYSIS LETTERS
·
2020
·Vol. 151
·期 2
·338-343
·
IF 2.482
Shi Hexian,Zhang Linfeng,Wu Yudong,Yu Rui,Peng Yang,Wang Yantao,Li Teng,Yang Weiran
Abstract Glucose and its derivatives are valuable and sustainable carbon sources that can be converted into varieties of value-added chemicals. In this study, d -glucaric acid was selectively converted to 3-iodoadipic acid (3-IAA) by hydrodeoxygenation in HI-Rh/C-H 2 system. During this process, HI was a reducing reagent, which can be regenerated in situ by metal catalyzed hydrogenation. The reaction pathway was proposed based on the intermediates identification. Under the optimal conditions, 67.2% yield of 3-IAA was obtained at 130 ℃ for 4 h. As a platform molecule, 3-IAA can be further converted to varieties of building block efficiently, such as adipic acid (AA) and 3-hydroxyadipic acid (3-HAA). Graphic Abstract
研究领域:
化学工程
·
可再生资源转化
✓ 已验证
产品关联
DOI
高影响因子
Science of Advanced Materials
·
2015
·Vol. 7
·期 6
·1021-1027
·
IF 2.598
Yu Jin-Gang,Chen Na,Jiao Fei-Peng,Liu Qi,Jiang Xin-Yu,Jiang Jian-Hui,Chen Xiao-Qing
A novel and facile method for preparing iodinated carbon nanotubes, with iodine and hydrogen simultaneously covalently bound to the surface of nanotubes, has been developed. The functionalized carbon nanotubes were fully characterized using Fourier transform infrared spectroscopy, X-ray
photoelectron spectroscopy, Raman spectroscopy, energy-dispersive X-ray (EDX) spectroscopy and thermogravimetric analyses. This is the first report on the successful functionalization of single-walled carbon nanotubes using hydroiodic acid.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
CATALYSIS COMMUNICATIONS
·
2017
·
IF 3.33
Tingting Hou,Chaofeng Zhang,Yehong Wang,Zhenting Liu,Zhixin Zhang,Feng Wang
A metal-free and efficient approach to N -arylpyrrolidines from arylamines and cyclic ethers catalyzed by hydrogen iodine is described. In this protocol, no additive is added and a wide range of N -arylpyrrolidines are synthesized with up to 99% yield. Reaction mechanism involving iodine radical is proposed.
研究领域:
有机化学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
Processes
·
2024
·Vol. 12
·期 8
·1768
·
IF 2.8
Jinxu Zhang,Bo Ling,Yong He,Yanqun Zhu,Zhihua Wang
Hydrogen energy, as a clean, renewable, and high-calorific energy carrier, has garnered significant attention globally. Among various hydrogen production methods, the thermochemical iodine–sulfur (I-S) cycle is considered the most promising due to its high efficiency and adaptability for large-scale industrial applications. This study focuses on the distillation characteristics of the HIx(HI–I2–H2O) solution within the I-S cycle, which is crucial for achieving the high-concentration HI necessary for efficient hydrogen production. Previous methods, including phosphoric acid extraction–distillation and reactive distillation, have addressed azeotrope issues but introduced complexities and equipment demands. This research constructs a hypo-azeotropic HIxsolution distillation experimental system and uses the Aspen Plus v14 software to optimize distillation parameters. By analyzing the effects of feed stage, reflux ratio, and feed temperature, the study provides essential data for improving distillation efficiency and supports the scale-up of I-S cycle technology. The findings indicate that optimal distillation is achieved with a feed position at 1/3 column height, a reflux ratio of 1.4, and a feed temperature near the boiling point, enhancing the feasibility of industrial hydrogen production via the I-S cycle.
研究领域:
化学工程
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Xuhan Li,Ran Zhang,Xiao Zhu,Liqiang Zhang
A series of N-doped activated carbon (NAC) with varying N contents were prepared to study the effect of N-doping on hydrogen iodide (HI) decomposition over activated carbon in sulfur-iodine (SI) cycle for hydrogen production . Element analysis , XPS and N 2 adsorption were performed for samples’ characterization. The HI conversion was proportional to the N content and the sample with 6.006% N content gave the highest HI conversion of 22.84%. Density functional theory (DFT) calculations confirmed the experimental results and elucidated the influence mechanism. The increase of N contents was favor to the decomposition of HI by enhancing the chemisorption of HI molecule on carbon structure. The role of N-doping was to remodel the local electronic density and charge distribution on the carbon surface . In addition, the effect of types of N-containing functional groups on HI decomposition was calculated. Results showed that the N-6 structure was conducive to the chemisorption of HI but N-5 and N-Q structures had a reverse effect. However, when the three N-containing functional groups exist simultaneously, the overall chemisorption of HI was enhanced, which, in turn, enhanced the decomposition of HI. This study can provide underlying guidance for preparing highly efficient NAC for HI decomposition.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2024
·
IF 2.3
Yu Pengxin,He Jianshen,Du Mingzhi,Lai Ying,Peng Yang,Yu Fuqing,Wang Hongmin,Yang Weiran
Disproportionation of alcohols to the corresponding alkanes and aldehydes/ketones is an important reaction, especially for biomass valorisation. Previously, we reported for the first time that hydroiodic acid can be used as an efficient catalyst for the alcohol disproportionation reaction, and the interconversion between hydroiodic acid and iodine is the key step for hydrogen transfer. As a continuation of our previous work, this work mainly focused on the mechanistic study involved and studied the difference between hydroiodic acid or molecular iodine as the catalyst for the disproportionation of alcohols. Density Functional Theoretical calculation indicated the oxidation step was a synergistic reaction process through the iodine effect on oxygen-hydrogen bond, which was proved by the characteristic oxygen-iodine bond captured by in-situ Attenuated Total Reflectance Fourier Transform Infrared. A non-polar solvent was preferable for the reaction with iodine. Addition of small amount of water was shown to be beneficial for the reaction, because water promoted Brønsted acidity of hydroiodic acid and accelerated the rate-determining step. Finally, we showed that the system was also applicable to various benzyl, allyl alcohols, and some heterocyclic alcohols. Graphical Abstract
研究领域:
化学
·
催化反应机制
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·
IF 4.229
Shaojie Xu,Yong He,Biyi Huang,Yanwei Zhang,Zhihua Wang,Kefa Cen
Although several technologies, such as reactive distillation and catalytic membrane reactor , have been proposed to improve HI conversion efficiency, they still experience several challenges for the application in HI section. In this study, an electrochemical cell was employed for hydriodic acid decomposition under the presence of iodine. Several commercial proton-exchange membranes (PEMs), namely, Nafion 117 and Nafion 115, were used as separators for the electrochemical cell. Anodization of iodide anion occurred at the graphite electrode in the anode compartment. Hydrogen was generated by the reduction reaction of hydrogen cations, which migrated from anolyte to catholyte. In electrolysis experiments, PEM showed good performance in terms of high transport number of proton and low iodine permeation . Several parameters, such as operating temperature, HI molarity , and I 2 molarity in anolyte, which affected current efficiency, iodine permeance , and electric resistance of test cell, were investigated. High operating temperature and I 2 molarity in anolyte enhanced the permeability of iodine, which had several negative influences on electrochemical cell performance. Although current efficiency was negatively affected by increasing temperature and I 2 molarity, it still remained above 0.85 in the range of 30 °C–75 °C. Ohmic resistance , which is a component of cell resistance, offered by PEM was investigated with Nafion 117 and 115. Apart from graphite plates, activated carbon papers were adopted as electrodes to reduce the overpotentials due to their high specific surface characteristic.
研究领域:
化学工程
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可再生能源
✓ 已验证
产品关联
DOI
高影响因子
Nano-Micro Letters
·
2020
·Vol. 12
·期 1
·1-12
·
IF 12.264
Yang Xiaokun,Yang Ji,Khan Jahangeer,Deng Hui,Yuan Shengjie,Zhang Jian,Xia Yong,Deng Feng,Zhou Xue,Umar Farooq,Jin Zhixin,Song Haisheng,Cheng Chun,Sabry Mohamed,Tang Jiang
The hydroiodic acid was explored systematically to modify PbS quantum dots (QDs) ink process, which could remove trap states by hydroxyl ligand and improve iodine passivation on the PbS-QDs surface.
This strategy solved the essential question of PbS-QDs ink process and showed the favorable application prospects in QDs technology.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Jianjun Xiao,Qinfang Chen,Rui Yu,Jiayi Qian,Zihao Liu,Teng Li,Haiping Yang,Jing'ai Shao,Weiran Yang,Hanping Chen
Developing cost-effective and high-performance catalysts in biomass chemistry is motivated by creating sustainable technologies dependent on inexpensive and abundant resources. The existing methods for the direct preparation of 5-methylfurfural (5-MF) from biomass-derived fructose mediated by hydrogen iodide (HI) mainly require precious metal catalysts. This research showed that low-cost tungsten carbide (WC) was capable to produce HI from iodine (I 2 ) via liquid-phase hydrogenation, but a pivotal limitation was the poor stability under the combination effects of water and I 2 . To solve this problem, the bulk WC and the high dispersion supported WC were modified by hydrophobic organosilicones through simple liquid phase deposition. Both of the two superhydrophobic WC materials had better stability and their catalytic activity were comparable to the expensive palladium-carbon (Pd/C) catalyst in the preparation of 5-MF, especially the superhydrophobic high dispersion supported WC. This work highlights the potential of the low-cost WC with simple superhydrophobic modification in assisting the direct preparation of 5-MF from fructose mediated by HI, which has high significance to the sustainable development of the low-cost biomass chemical engineering.
研究领域:
催化
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生物质化学
·
材料科学
·
可持续工程
✓ 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）