APPLIED CATALYSIS A-GENERAL
·
2018
·
IF 4.521
Liqin Wang,Heqin Guo,Qilong Xie,Jungang Wang,Bo Hou,Litao Jia,Jinglei Cui,Debao Li
Furfural is one of the most valuable biomass platform compounds which is typically prepared from hemicellulose. Conversion of cellulose and its derived hexoses, which are the most abundant resource in nature, to furfural, is a big challenge. The amount of the reactive form (fructofuranose) which was beneficial to the formation of furfural and HMF, was increased when the solvent transformed from water to γ-butyrolactone (GBL)-water. The GBL promoted the adsorption of fructose on HY. The transfer of fructose from the solution to the channels of HY was enhanced with the introducing of GBL in solvent. The HY zeolite with apertures of 7.4 Å was found to promote the formation of acyclic fructose from cyclic fructose (8.6 Å) in the synergy with GBL. The Brønsted acid sites in the channels of HY favored the selective cleavage of the C C bond in acyclic fructose to xylose, and promoted the following dehydration of xylose to furfural, simultaneously. The furfural yield was increased while the 5-hydroxymethylfurfural (HMF) yield was decreased with the decrease of the Brønsted acid sites density. The maximum furfural yield was 37.8% over HY-3, while the maximum HMF yield was 69.2% over HY-1 in the conversion of fructose in GBL-water solvent. In addition, the etherification of HMF was the main factor for the low HMF yield and carbon balance in fructose conversion in GBL-water solvent.
研究领域:
化学工程
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生物质转化
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Yueqing Wang,Guoqiang Ding,Xiaohai Yang,Hongyan Zheng,Yulei Zhu,Yongwang Li
The selective synthesis of furfural or hydroxymethylfurfural (HMF) from fructose on single catalyst (Beta zeolite, Hβ) is challenging task. However, in this study, selectivity of Hβ zeolite was discovered easily to tune by solvent effects. Strong solvent effects on the selectivity of fructose conversion were observed in different manners depending on the solvent used. It was shown that the coordinated state of framework aluminum, induced by solvent effects, has a major impact on the selectivity. The solvents with amide group were discovered to induce the reversible tetrahedral-octahedral framework aluminum transformation, but the configuration of aluminum was no influenced by other solvents such as γ-butyrolactone (GBL). Compared with other solvents, the GBL was not able to enhance turnover frequency (TOF) value of reaction but also suppress the degradation of furfural. Interestingly, a considerable yield of furfural (50.25%) was obtained combined with tetrahedral and octahedral framework aluminum active sites in GBL, while high selectivity of HMF (83.3%) was achieved in presence of single tetrahedral framework aluminum over Hβ in NMP.
研究领域:
催化化学
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Le Gou,Longfei Xie,Yuanyuan Wang,Liyi Dai
The production of amine intermediates from biomass is capturing increasing attention. Herein, an efficient conversion of furfural to furfural amine over RuCo/AC catalyst under hydrothermal conditions has been investigated. The effects of different carriers, bimetals, and reaction conditions were systematically investigated in green solvents (water). Fully conversion of furfural and high furfural amine yield (92.13%) at 80 ℃ for 1 h over 4Ru1Co/AC. The excellent catalytic performance of 4Ru1Co/AC was attributed to its high acidity and good hydrogenation ability, as well as the synergistic effect between Ru-Co alloy formations and the activated carbon. Importantly, the highly selective preparation of furfural to furfural amine is a promising way to high-value utilization of cellulosic biomass in green solvents.
研究领域:
化学工程
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催化反应
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绿色化学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2012
·
IF 2.721
Junhua Zhang,Lu Lin,Shijie Liu
We present here the results of an investigation aimed at identifying catalysts for the dehydration of glucose and xylose to 5-hydroxymethylfurfural (HMF) and furfural in a diphasic reaction system, and the subsequent conversion of HMF and furfural to 2,5-dimethylfuran (DMF) and 2-methyl furan (MF) was also investigated. For the dehydration of glucose and xylose mixture, a series of SO42–/ZrO2–TiO2 solid acid catalysts were prepared by precipitation and impregnation method. Effects of various reaction parameters and catalyst reuse cycle toward the reaction performance were studied. Experimental results indicated that the product yield could reach 30.9 mol % (for HMF) and 54.3 mol % (for furfural) under the optimal experimental conditions. The SO42–/ZrO2–TiO2 catalyst is recoverable from the resulting product mixture and reused multiple times after calcination without any substantial change on the HMF and furfural yield. Furthermore, effects of various hydrogenation parameters of HMF and furfural in n-butanol promoted by carbon-supported ruthenium (Ru/C) were discussed, and the highest yield could reach 60.3 mol % (for DMF) and 61.9 mol % (for MF) under the optimal experimental conditions by starting with HMF and furfural in pure n-butanol, but the target products of DMF and MF could not be detected when directly used by the separated organic phase as solvent and substrate. However, the DMF and MF yield could reach 32.7 and 17.5 mol %, respectively, when the separated organic phase undergoes a further purification, which indicated that the purification of the organic phase is a key step for the further hydrogenation of HMF and furfural to DMF and MF.
研究领域:
化学工程
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2022
·
IF 11.889
Shanta Dutta,Qiaozhi Zhang,Yang Cao,Chunfei Wu,Konstantinos Moustakas,Shicheng Zhang,Ka-Hing Wong,Daniel C.W. Tsang
Lignocellulosic paper waste constitutes a major waste stream globally, which should be valorised for chemical production. However, paper properties ( e.g. , feedstock composition, cellulosic crystallinity, and thermal stability/degradability) vary with raw materials and pulping processes. This study investigated levulinic acid (LA), hydroxymethylfurfural (HMF), and furfural production by H 2 SO 4 and FeCl 3 catalysed conversion of nine types of paper wastes in a green solvent system (1:1 γ‐valerolactone/water). At 160–180 °C for 1–20 min, ∼23–27 wt% LA yield was achieved from sanitary papers, tracing/parchment paper, and paper food box mainly containing crystalline cellulose, while a lower LA yield (∼10–20 wt%) was obtained from other paper wastes with high contents of ash and lignin. A higher selectivity towards HMF (∼12 mol%) was achieved in the presence of FeCl 3 . A furfural yield of ∼ 4–7.5 wt% was also obtained from the hemicellulose content. This study elucidates crucial factors and desirable characteristics of paper waste for catalytic valorisation.
研究领域:
化学工程
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环境科学
·
生物质能
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOMASS & BIOENERGY
·
2024
·
IF 5.8
Huangxian Zhang,Kun Yuan,Yichen Zou,Dayong Peng,Jian Kang,Jing Chen,Wanming Xiong,Zongde Wang
The conversion of waste lignocellulosic biomass into biomass platform chemicals is very promising. In this work, a novel resin-based solid acid catalyst was obtained by condensation of furfuryl alcohol with furfural , and mild calcination and sulfonation process. Then it was used to convert sugars and biomass to obtain furan compounds. Results showed that the solid acid with a furfural to furfuryl alcohol molar ratio of 3:1 is an irregular mesoporous material , with a specific surface area of 134.18 m 2 /g and an acid content of 2.723 mmol/g, which is extremely stable below 200 °C. 82.2 % (from fructose), 15.8 % (from glucose), 10.0 % (from cellobiose) yields of 5-HMF and 35.5 % (from xylose) yield of furfural could be obtained at 160 °C for 2 h. It can be reused more than 5 times and can restore the best catalytic effect after re-sulfonation. Notably, in the catalytic conversion of rice husk, rice straw, camphor tree branch and leaves under typical reaction conditions, 5-HMF and furfural was in yields of 9.4–24.5 % and 20.3–47.9 %, respectively. Moreover, a 10 % water dropwise to solvent can effectively promote the catalytic conversion of biomass, while there is a significant inhibitory effect after it exceeds 20 %.
研究领域:
化学工程
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生物质能
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催化科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 43
·24534-24540
·
IF 2.936
Jin Tan,Haiyong Wang,Longlong Ma,Chenguang Wang,Qiying Liu,Qi Zhang,Minghong He
Several simple and effective solvents combined with Hβ zeolite were tested to selectively convert glucose into furfural and hydroxymethylfurfural in this work. The physicochemical properties of typically different polar aprotic solvents were compared. Tetrahydrofuran was found to be a suitable solvent in the selective conversion of glucose. The effect of reaction parameters, such as temperature, reaction time, water content, glucose dosage and protonic acid addition, on the product distribution were investigated in detail. Furfural and hydroxymethylfurfural could be selectively produced in this system, and the highest yields of furfural and hydroxymethylfurfural were up to 35.2% and 49.7% respectively. Furfural could be stable in a tetrahydrofuran medium when adding 5 wt% water in the absence of extra protonic acid. However, furfural production was extremely suppressed after addition of an acidic inorganic salt, which increased the yield of hydroxymethylfurfural. This investigation indicates a simple and feasible method to selectively produce furfural and hydroxymethylfurfural from renewable cellulosic carbohydrates.
研究领域:
化学工程
·
可再生资源转化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Xian Zhang,Miaomiao Han,Guoqiang Liu,Guozhong Wang,Yunxia Zhang,Haimin Zhang,Huijun Zhao
We successfully synthesize Cu 3 P nanosheets and granular Ni 2 P nanocrystals on the surface of commercial carbon fiber cloth (CFC) (Cu 3 P/CFC and Ni 2 P/CFC) respectively by a vapor-phase hydrothermal route. The as-synthesized Ni 2 P/CFC and Cu 3 P/CFC as electrodes all show the bifunctional electrocatalytic performances towards hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER), simultaneously all demonstrating the electrocatalytic activities of the furfural hydrogenation reaction (FHR) and furfural oxidation reaction (FOR) in alkaline media. Comparatively, the Cu 3 P/CFC exhibits higher FHR activity with almost ∼100% selectivity of the furfuryl alcohol (FAL) product and high Faradaic efficiency (FE) of 92.0%–98.0% over the applied potential range of −0.05 to −0.55 V ( vs . RHE), while the Ni 2 P/CFC indicates higher FOR activity with almost ∼100% selectivity of furoic acid (FA) product and FE of 90.0%–98.0% at the applied potential of 1.2–1.7 V ( vs . RHE) in alkaline electrolyte containing 50 mM furfural. The DFT calculations results reveal that the (1–10) dominated Cu 3 P can obtain higher hydrogen coverage but restricted H 2 desorption compared to the (001) dominated Ni 2 P, therefore the adsorbed active hydrogen (H) atoms from water can be effectively used for the FHR process, resulting in high FE and current density. The superior FOR activity of the Ni 2 P/CFC is mainly stemmed from the formed high valence state Ni species during electrocatalysis. Thanks to the superior FHR performance of Cu 3 P/CFC and FOR activity of Ni 2 P/CFC, a two-electrode H-type electrocatalysis system assembled with the Cu 3 P/CFC as cathode and Ni 2 P/CFC as anode can be constructed for simultaneously electrocatalytic production of FAL and FA with almost ∼100% selectivity in 1.0 M KOH electrolyte containing 50 mM furfural in each chamber under the given experimental conditions, demonstrating high FE of 97%–99%.
研究领域:
材料科学
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化学工程
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2019
·
IF 3.834
Xiaowei Fang,Ze Wang,Wenli Song,Songgeng Li,Weigang Lin
The preparation of furans from catalytic conversion of corn stover is investigated in H 2 O–THF (tetrahydrofuran) co-solvent system, and the effects of Bronsted acids (H 2 SO 4 , HCl, HNO 3 ) combined with alkali metal cations (Li + , Na + , K + ) are studied systematically. It is found that the effect of individual acid in promoting the summary yield of 5-hydroxymethylfurfural (HMF) and furfural (FF) can be ordered as Cl − > SO 4 2− > NO 3 − . When combined with a salt, the anion effect can be ranked in SO 4 2− > Cl − > NO 3 − , both for the HMF yield and the summary yield of furans. Based on the best anion of SO 4 2− , the impacts of the combined cations can be finely ranked as Na + > K + > Li + . For the system with Cl − , it ranks in K + > Li + > Na + for the HMF yield or the summary yield of furans. The performance of NO 3 − is so poor that no liquid product can be detected when any alkali metal cations is combined with HNO 3 . The performance of H 2 SO 4 /Na 2 SO 4 is the best among 9 tested combined catalysts, and the yield of HMF and FF from corn stover conversion under optimized conditions are 76% and 81% respectively.
研究领域:
生物化学
·
可再生资源转化
✓ 已验证
产品关联
DOI
高影响因子
BioEnergy Research
·
2022
·Vol. 16
·期 2
·1108-1120
·
IF 3.852
Xie Ruosong,He Weiwei,Qu Guangfei,Wu HuanHuan,Li Ziying,Li Junyan,Li Weijie
The application of biomass pyrolysis was still limited owing to the high pyrolysis temperature and the complicacy of pyrolysis products. In this work, a homogeneous low-temperature cellulose catalytic pyrolysis system is proposed to directional products 5-methylfurfural. The low-temperature catalytic activity and products distribution of cellulose pyrolysis in [bmim][FeCl 4 ] (Fe-IL) and [bmim] 2 CoCl 4 (Co-IL) at temperature gradients from 150 to 300 °C were studied. As the results, both Fe-IL and Co-IL can catalyze the pyrolysis of cellulose, especially for Fe-IL, which effectively reduced the pyrolysis temperature of cellulose to 200 °C. Nano-scale and micron-scale particles were produced by the catalysis of Fe-IL and Co-IL, respectively. Fe-IL have a high selectivity for the production 5-methylfurfural (5-MF) and furfural (FF), which were 71.12% and 19.14% respectively at the pyrolysis temperature of 200 °C. Furthermore, the mechanism of low-temperature catalytic pyrolysis and the directional evolution mechanism of 5-MF and FF were suggested. Graphical abstract
研究领域:
能源化学
·
生物质能
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 66
·41546-41551
·
IF 3.108
Haosheng Xin,Tingwei Zhang,Wenzhi Li,Mingxue Su,Song Li,Qun Shao,Longlong Ma
In this work, glucose was transformed into 5-hydroxymethylfurfural (HMF) and 5-ethoxymethylfurfural (EMF) in the presence of AlCl3·6H2O and a Brønsted solid acid catalyst (PTSA–POM). GVL (γ-valerolactone)–water and ethanol–water solvent systems were evaluated in the dehydration reaction of glucose into HMF and EMF, respectively. Water content and dosage of AlCl3·6H2O were examined in the conversion of glucose into HMF, and some valuable chlorides (FeCl3·6H2O, NiCl2·6H2O, CrCl3·6H2O etc.) were also used in contrast with AlCl3·6H2O. Some different organic solvents were added to the ethanol–water system to explore whether it would be beneficial to the generation of EMF. A high yield of HMF (60.7%) was obtained at 140 °C within 60 min in GVL–water (10 : 1) solvent system, and total yield 42.1% of EMF and HMF (30.6% EMF, 11.5% HMF) was achieved at 150 °C after 30 min in an ethanol–water (9 : 1) solvent system.
研究领域:
化学工程
·
催化反应
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2023
·
IF 4.3
Mu-Ying Guan,Chang-Ying Hu,Qi-Shan Peng,Ying Zeng,Wen-Wei A.,Ze-Chun Wu,Zhi-Wei Wang,Huai-Ning Zhong
Bamboo sticks intended for food contact can produce 5-Hydroxymethylfurfural (5-HMF) and Furfural (FF) when used in high-temperature scenarios (e.g., barbecue and Kanto boil). The influencing factors in terms of baking conditions, salinity, pH, and dipping time of water on the formation of 5-HMF and FF in bamboo sticks were investigated. Specific migration of 5-HMF and FF also have been studied in bamboo sticks in contact with food simulants (water, 10 % ethanol, and 4 % acetic acid). The results showed that the effects of baking temperature and time on the formation of both showed a similar pattern which firstly increased and decreased afterward. Both 5-HMF and FF levels in bamboo sticks increased with decreasing pH and the presence of salt. After dipping bamboo sticks in water for a while, the moisture content of higher than 10 % in bamboo sticks presented low levels of 5-HMF and FF. In the case of all food simulants, the highest migrated concentration of 5-HMF and FF were found in 4 % acetic acid. Since there are no specific migration limits for 5-HMF and FF, estimated daily intake is calculated to evaluate their safety. Based on the studied migration results, 5-HMF and FF in bamboo sticks are relatively safe for consumers.
研究领域:
食品安全
·
化学
✓ 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）