FUEL PROCESSING TECHNOLOGY
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2018
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IF 3.956
Jingyuan Wang,Luhong Zhang,Yongli Sun,Bin Jiang,Yang Chen,Xiang Gao,Huawei Yang
In this work, novel Lewis acidic ionic liquids [ODBU]Cl/nZnCl 2 (n = 1, 2, 3, 4 and 5) with alkylated 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) cation and ZnCl 2 -based complex anion have been developed and utilized in extraction combined with oxidative desulfurization (ECODS) of both model oil and diesel fuel with hydrogen peroxide (H 2 O 2 , 30 wt%) as an oxidant. It was observed that the ECODS performance could be effectively optimized by the change of ZnCl 2 proportion. Some important reaction parameters such as reaction temperature, molar ratio of O/S, mass ratio of IL/oil and sulfide species were systematically investigated. Furthermore, the ILs could be reused for at least six cycles without noticeable changes in desulfurization performance as well as its chemical structure, thus revealing its good reusability . Finally, [ODBU]Cl/3ZnCl 2 was employed in the ECODS of a hydrogenated diesel, the S-content could be reduced from 559.7 ppm to 4.8 ppm with 99.2% sulfur removal via a one-step process under mild conditions.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Zhihan Tong,Juan Meng,Shi Liu,Yongzhuang Liu,Suqing Zeng,Lei Wang,Qinqin Xia,Haipeng Yu
Abundant and renewable cellulose is a potential candidate for petroleum-derived synthetic polymers. However, the efficient dissolution of this material is problematic because of the high cost, severe reaction condition (e.g., high temperature) and environmentally unfriendly (e.g., toxic reagents, and solvent recyclability). Herein, to realize the room temperature dissolution of cellulose with an inexpensive and eco-friendly solvent, we design a novel low-cost deep eutectic solvent that is composed of zinc chloride , water and phosphoric acid for the efficient dissolution of cellulose. This solvent is featured as having both the superior hydrogen bonding acidity and the hydrogen bonding basicity , and thus can act as a hydrogen bond molecular scissors to cleave the hydrogen bonds within cellulose. In this process, microcrystalline cellulose can be easily dissolved in the solvent at room temperature with a dissolution ratio up to 15 wt%. The dissolved cellulose can also be recovered without any derivatization . The universality, recyclability and pilot production of dissolving cellulose using this solvent are also demonstrated. This work provides a new strategy for the design of novel deep eutectic solvent capable of disrupting the hydrogen bonds of cellulose under mild conditions.
研究领域:
材料科学
·
绿色化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2017
·
IF 6.065
Siyang Li,Jinxi Feng,Shuanghong Tian,Shenyu Lan,Chao Fan,Xiaosheng Liu,Ya Xiong
For the first time, paint sludge waste (PS) was used as a pore forming agent in the preparation of sewage sludge derived carbon (SC). The tuning role and mechanism of PS for characteristics of SC were explored. It was found that a sludge carbon (SC PS-Zn ) with rich macro-, meso- and micro- porous could be produced by one-step pyrolytic process of sludge in the presence of PS and ZnCl 2. Its surface area could reach as high as 680.5 m 2 g −1 as 88.4 times and 4.8 times of sludge carbon without addition of PS and ZnCl 2 (SC) and only addition of ZnCl 2 (SC Zn ) , respectively. The macro- pores fabricated by PS provided much inner-space for ZnCl 2 to generate meso- and micro- porous, leading to a hierarchical porous structure. SC PS-Zn showed a high adsorption capacity of 685.4 mg g −1 for Chrysophenine, which is 1.3 and 1.7 times that of SC PS and SC Zn respectively. The adsorption difference could be simply attributed to the fact that the great molecules were difficult to enter micro- pores of SC Zn . It was also found that the difference was also dependent on orientation of Chrysophenine, which was related to pH value of solution.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Shuangping Xu,Juncheng Ma,Hongge Jia,Mingyu Zhang,Yanqing Qu,Chengbao Geng,Xiaozhou Zhao,Min Shao,Jingyu Xu,Xing Wang
Lignin-based porous carbon, a derivative of lignin, is acknowledged for its cost-effectiveness, stability, and environmental sustainability. It exhibits significant adsorption capacity for the removal of heavy metals and in wastewater treatment, rendering it a highly esteemed adsorbent material. However, the potential of lignin-derived porous carbon for the capture of iodine in environmental contexts has yet to be thoroughly investigated. This research aims to examine the iodine capture capabilities of lignin-derived porous carbon in both iodine vapor and iodine/cyclohexane solution. Initially, lignin derivatives (ADL) (Mn = 2.85 × 10 4 , Mw / Mn = 1. 73) were synthesized through the graft copolymerization of lignin (Mn ≈ 2500), 4-acetoxystyrene, and dienopropyl terephthalate in ethylene glycol, utilizing azobisisobutyronitrile (AIBN) as the initiator. Subsequently, ADL was transformed into layered lignin-based porous carbon (ADLC) by one-step carbonization and zinc chloride activation. The iodine adsorption capacity of ADLC was determined to be 2340 mg/g in an iodine vapor environment and 354 mg/g in a 500 mg/L iodine/cyclohexane solution. These findings indicate that the layered porous carbon (ADLC) derived from lignin represents a promising material for iodine capture, providing an economical, stable, and environmentally friendly approach to nuclear waste management.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Catalysis
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2020
·
IF 12.35
Peng Liu,Zhi Li,Xingyu Liu,Weiyu Song,Bowen Peng,Xinyue Zhang,Suofu Nie,Penghui Zeng,Zhongdong Zhang,Xionghou Gao,Baojian Shen
In fluid catalytic cracking (FCC), Brønsted acid plays a very important role. Herein, a zinc-modified ultrastable Y (USY) zeolite containing higher Brønsted acidity was prepared by synergistic treatment with zinc chloride and steaming. The results of characterization showed that selective dealumination and silicon healing due to introduction of zinc ions ([ZnCl]+ and [ZnOH]+) into zeolite could promote the formation of extra-framework silicon (EFS) and different silicon healing of the Al vacancies, which led to the formation of half-sodalite cages connecting with supercages and thus increased the availability of acidic sites in the sodalite cage. Meanwhile, DFT calculations demonstrated that the acidic strength of protons in the sodalite cage was enhanced by [ZnCl]+ and [ZnOH]+, and the synergy of Brønsted/[ZnCl]+ became stronger. As a result, the strong Brønsted acid was increased by 19%. This translated to higher n-octane and heavy oil (VGO) catalytic cracking activity and gasoline yield.
研究领域:
催化化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2020
·
IF 7.539
Yanzhi You,Xiankun Zhang,Pengfei Li,Fuhou Lei,Jianxin Jiang
Camellia oleifera shell (COS) is a worthy byproduct in woody edible oil production enriched in hemicellulose and lignin. This paper aims to explore the high-value transformation of COS for the production of xylooligosaccharides (XOS) with main degree of polymerization (DP) of 2–5 by the catalysis of ZnCl 2 . The effect of pretreatment temperature, reaction time and ZnCl 2 concentration on the contents and DP distributions of XOS were analyzed. Moderate reaction conditions tended to achieve high content XOS, and the maximum value 61.38% and 14.39 g/L of XOS yield and concentration, respectively, peaked at 170 °C for 30 min using 0.5% (w/w) ZnCl 2 . The first time the solid residues derived from the production process of XOS were used as the precursor for the co-production of activated carbons (AC). The maximum iodine values and BET surface area were 5623.94 mg/g and 1244.46 m 2 /g, respectively, using 2.20 M ZnCl 2 as the activating agent .
研究领域:
生物化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2024
·
IF 4.9
Paiva Mateus F.,Albuquerque Elise M.,de Souza Priscilla M.,Bitter Johannes H.,Vanhove Guillaume,Wojcieszak Robert,Noronha Fábio B.
Increasing the efficiency of cellulose hydrolysis is a crucial milestone to enable its use as a platform for the production of renewable chemicals. Consequently, exploring alternative techniques for cellulose dissolution and subsequent depolymerization and hydrolysis remains a pivotal area of research. This study delves into the performance of diverse solid acid catalysts (ion-exchange resins, metal oxides, and zeolites) for cellulose depolymerization when combined with a concentrated solution of zinc chloride (ZnCl 2 ) as the reaction medium and extractant. The influence of this molten salt hydrate on cellulose dissolution and the stability of the tested catalysts was thoroughly investigated. Optimal mild operating conditions (90 °C and 2 h) that facilitate enhanced conversion and selective glucose production were identified. The highest glucose yields (exceeding 40%) were obtained with Amberlyst-15 and HZSM-5 (SiO 2 /Al 2 O 3 = 23), effectively mitigating product degradation and equaling or surpassing the traditional homogeneous system using H 2 SO 4 . Furthermore, insights into the deactivation mechanisms affecting the best catalysts are provided.
研究领域:
生物化学
·
可再生能源
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
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2017
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IF 2.813
Ling Zhang,Xue Liu,Rui-Xia Yang,Nian-Yu Huang,Wei-Qiao Deng
Covalent triazine-based frameworks (CTFs) are important microporous materials with a wide range of applications. Here, we demonstrate an environmentally benign and economic synthetic pathway to CTFs. The monomers used for CTFs, aromatic nitriles , were obtained by cyanation using nontoxic potassium hexacyanoferrate(II) in place of commonly used toxic cyanides. Then, the CTFs were synthesized by trimerization of the corresponding cyano monomers in molten zinc chloride . A series of CTFs was synthesized, and the highest Brunauer-Emmett-Teller surface area measured in this series was 2404 m 2 /g. Among the synthesized CTFs, CTF DCP exhibited excellent CO 2 adsorption properties, with a CO 2 uptake of 225 mg/g at 0 °C.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
·
2023
·
IF 3.4
Xin Gao,Jiayong Gao,Jiaqi Li,Gaozhe Liu,Heng Zhang,Xiaoning Tang,Lincai Peng,Keli Chen
The development of cellulose-substrate remedies remains a technological challenge owe to their inability to self-heal and excessive dependence on petroleum-based adhesives, which is further hindered by the significant drawbacks of commercially unavailable welding materials and inconvenient manipulation. We herein describe a cellulose-substrate bonding technique achieved through partial dissolution using a low dosage of ZnCl 2 aqueous solvent (ZS) and its dissolved cellulose (ZDC) gel as adhesives. This method demonstrates strong joint areas between strips without any failure, while shrinkage in the diffusion area remains the main cause of breakage. This shrinkage phenomenon can be alleviated by using ZDC instead of ZS, due to the water retention of hydrophilic hydroxyls on the macromolecular chains of dissolved cellulose . The well-maintained tensile strength of the ZDC-bonded strip (5.0% lower than the control) indicates that partially dissolved cellulose fills gaps between fibers, providing evidence for a mechanical interlocking adhesive mechanism in strip connections. ZDC gels exhibit favorable adhesive behavior for hand-sheets, art paper, and corrugated board, with welded joints demonstrating robust mechanical performance even after soaking in water for 6 h.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2022
·
IF 6.449
Sudong Yang,Lin Chen,Shanshan Wang,Shuai Liu
Superhydrophilic textiles with underwater superoleophobicity have shown excellent separation performance for emulsified oil in wastewater, but their hierarchical structure and hydrophilic chemical design are complicated. Herein, a hydrophilic hierarchical layer of cellulose is constructed on commercial cotton fabrics surface through in-situ self dissolving and regenerating strategy. During the process, zinc chloride solution is used as solvent to dissolve cellulose, and sodium sulfate is used as pore forming agent to obtain open porous structure. The cellulose provides both hydrophilic surface and hierarchical structural foundation for the remodeled cotton fabrics (RCFs) without any further chemical modification. Based on the robust mechanical stability, superhydrophilicity, underwater superoleophobicity (θ oil > 150º), and anti-oil fouling property, the RCFs achieved a remarkable separation performance for oil-in-water emulsions with high separation efficiency (> 99.0%) and recyclable antifouling performance. The developed RCFs assembly strategy provides an excellent membrane for oil-in-water emulsion separation, and a new prospect for the convenient and universal construct of other superwetting cellulose-based materials.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Sudong Yang,Lin Chen,Shuai Liu,Wenjie Hou,Jie Zhu,Peng Zhao,Qian Zhang
Given complexity and diversity of oily wastewater, developing highly efficient separation materials through green and facile strategy are urgently needed. Herein, a smart strategy is demonstrated to transform raw cotton into uniform cellulose sponge for separation oil-in-water emulsion. The raw cotton is directly treated in zinc chloride aqueous solutions through a controllable dissolution process. After regeneration without any further chemical modification and freeze drying, the evolved cellulose sponge, which is composed of partially dissolved cotton fiber and exfoliated regenerated cellulose, exhibits interesting three-dimensional (3D) interconnected hierarchical porous network structure and stable wettability of superoleophobicity (θ oil > 150º) under water. Cellulose sponge has excellent underwater superoleophobicity and antifouling property due to the natural hydrophilicity of cellulose. Based on the beneficial 3D hierarchical structure and superwettability, the cellulose sponge can separate highly emulsified oil-in-water emulsions with efficiency up to 99.2% solely under the driving of gravity. Our strategy provides a generic way to convert cellulose-based materials into cellulose porous materials with excellent permeability, separation efficiency, antifouling, and reusability property for oil/water emulsions separation. This economical, environmentally friendly and functional cellulose sponge not only allows natural cotton resources to be used rationally with high value-added, but also effectively solves the problems of oily wastewater.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
ACS Omega
·
2020
·
IF 2.87
Ziwei Liu,Xiaoshun Zhou,Fengshou Wu,Zhimei Liu
Activated carbon, an amorphous carbon material with a high specific surface area and void fraction, is widely used as an economical adsorbent in many fields. In this work, a kind of new activated carbon composite for saccharide column separation was prepared by zinc chloride impregnating and microwave heating. The structural characterizations validate the increase in porosity and the specific surface area of the activated carbon as well as the change of the activated carbon crystallite lattice. The chemical characterizations validate the increase in the number of oxygen-containing functional groups and structural bonding of zinc with the activated carbon surface. Compared with the blank control, the surface Zn element improves the adsorption selectivity of the activated carbon to the target saccharides. Under the special mechanism of microwaves, the pores created by expansion from the inside to the outside facilitate the free flow of the mobile phase. The eight saccharides can be separated by the columns packed with the activated carbon impregnated with 40% and 70% zinc chloride.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）