CELLULOSE
·
2018
·Vol. 25
·期 12
·7065-7078
·
IF 3.809
Liu Xiuyu,Jiang Yan,Qin Chengrong,Yang Shuang,Song Xueping,Wang Shuangfei,Li Kecheng
Abstract Bagasse fibers are smaller and have more hemicellulose than softwood fibers, which is expected to require less mechanical energy in cellulose nanofiber production as small size and hemicellulose benefit the disintegration of fibrils during a mechanical process. Both bagasse fibers and softwood fibers were used in this investigation for producing nanofibers with enzyme pretreatment followed by mechanical grinding. Results showed that nanofibers from bagasse had more uniform diameters about 9 nm, and the films made from them were more transparent. Grinding energy consumption of bagasse fibers was significantly lower than softwood, by 7.31%, and enzyme pretreatment further improved the energy efficiency, by 59.71%, and the yield of nanofibers, by 30.57%. The mechanical strength and thermal stability of nanofiber films from bagasse fibers were similar with that from softwood fibers. The results support the idea that bagasse, a waste or byproduct from sugar industry can be a promising alternative for nanofiber production.
Graphical abstract
研究领域:
生物材料学
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纳米科技
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制浆造纸工程
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可再生资源利用
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食品与农业废弃物处理
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2019
·
IF 3.375
Sen Liu,Hao Ling,Juan Lv,Hongxia Gao,Yanqing Na,Zhiwu Liang
The sulfolane was, surprisingly, found to be a universal phase-splitting solvent in a serial of aqueous primary alkanolamine solution for CO2 removal; the reaction product of carbamate and hydrophilicity of amine can be the key factor for triggering phase change; also, the phase change can have a significant effect on CO2 capture performance. To comprehensively understand the effect of phase change on absorption, stripping, and phase separation performance, MEA sulfolane-based solution was chosen as a typical biphasic system for investigation. First, the experimental results revealed that the phase change can dramatically decrease the absorption rate and lead to less CO2 capacity in absorption processes. Second, the enriched MEA in separated solution can substantially decrease the energy consumption for CO2 stripping but exorbitant concentration of MEA can significantly reduce the CO2 removal efficiency in a quasicycle of absorption and desorption processes. Third, the phase separation rate of emulsion of MEA/sulfolane solution can be obviously improved by the increasing temperature, and fortunately, the increasing temperature had less effect on miscible solubility of MEA and sulfolane in two separated phases. Finally, on consideration of the absorption rate, energy consumption, and phase separation rate, a new technological process was proposed for CO2 capture using primary alkanolamine sulfolane-based solution to achieve the goal of relative high CO2 removal efficiency and energy saving.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Zhangdi Li,Qiong Tian,Jicheng Xu,Shouzhen Sun,Ying Cheng,Fengxian Qiu,Tao Zhang
Effective cleanup of viscous crude oil spills remains a persistent and crippling challenge. Herein, this work presents a Joule-heated superhydrophobic flower-like Cu8(PO3OH)2(PO4)4·7H2O-coated copper foam (SHB-CF@CP) for rapid cleanup of viscous crude oil spills via a facile strategy. The SHB-CF@CP shows outstanding water repellency and excellent stability of hydrophobicity in harsh environments. Due to the high electrical conductivity and thermal conductivity, it requires lower power energy consumption (less than 1 V of voltage input) to raise the temperature significantly, which dramatically reduces the viscosity of crude oil (from ∼2 × 105 to ∼60 mPa s) and then increases the oil absorption rate, effectively avoiding the poor mobility and ineffective absorption of viscous crude oil. Notably, the SHB-CF@CP can achieve continuous and quick cleanup of crude oil under in situ pumping force. The high-performance Joule-heated SHB-CF@CP sorbent with a strong porous skeleton, corrosion resistance, and low predicted operational costs holds a promise of promoting its practical applications in the cleanup of intractable and large-area viscous oil spills.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2019
·
IF 5.128
Bihong Lv,Junhai Wu,Chengrui Lin,Zuoming Zhou,Guohua Jing
Due to its excellent and reversible CO 2 uptake, the novel aprotic heterocyclic anion-based dual functionalized ionic liquid solution ([DETAH][AHA]) presented as an efficient candidate for CO 2 capture. The kinetics of CO 2 capture into [DETAH][AHA] solutions, e.g., [DETAH][Im] and [DETAH][Tz], was studied by using a double-stirred cell, with concentrations ranging from 0.25 to 1.0 mol/L and temperatures from 303 to 333 K. The overall first-order reaction rate constants ( k ov ) and the secondary-order reaction rate constants ( k 2, FIL ) of CO 2 capture into this two [DETAH][AHA] solutions were obtained, and they all increased as the temperature increased. The relationship between k 2, FIL and reaction temperature was determined by Arrhenius equation, which expressed as k 2 = 1.0365 × 10 12 exp - 5873.67 T and k 2 = 3.5361 × 10 12 exp - 6380.60 T , respectively. The calculated activation energies of such two solutions were 48.83 kJ/mol and 53.05 kJ/mol, respectively. From the heat duty evaluation, the total CO 2 regeneration energy consumption of [DETAH][Im] and [DETAH][Tz] were respectively 2.94 and 2.84 GJ·mol −1 CO 2 , which were all less than that of traditional MEA solution due to their lower desorption reaction heat. A fast absorbent rate, a lower activation energies and regeneration energy consumption of [DETAH][AHA] solutions indicate greater potential and application prospects.
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
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
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2022
·
IF 6.814
Zhi Zhou,Shuqing Feng,Shujie Gai,Peixin Gao,Chen Xu,Mao Xia,Wenbang Tang,Xuedan Lu
Industrial Seedling Raising (ISR) is increasingly becoming an important part of Modern Agriculture because of its efficient utilization of land, water, and fertilizer as well as its advantages of being not easily affected by the weather. However, the high cost and high energy consumption of light sources for plant growth is limiting the popularization of ISR technology. Phosphor-converted light-emitting diodes (pc-LEDs) make use of relatively affordable red phosphor and blue light chips, providing an adjustable spectrum to optimize plant growth. To identify the energy-saving light quality of pc-LEDs, we investigated the effects of a variety of light qualities on the growth of tobacco seedlings. Y 3 Al 5 O 12 :Ce 3+ , CaAlSiN 3 :Eu 2+ , KAl 11 O 17 :Eu 2+ phosphors were combined with the blue light chip according to different proportions to produce the following light sources: CK (white light), T1 (blue light), T2 (red light), T3 (red: blue light ratio = 1:4), T4 (red: blue light ratio = 4:1). The tobacco variety Xiangyan7 grown continuously under T1, T2, T3, and T4 significantly increased the leaf area, stem length, biomass, root area and main root length compared with those grown under white light. Among the five kinds of light qualities tested, T4 treatment exerted the best effect on leaf development and biomass increase, while T2 exerted the best effect on stem elongation . The cytological analysis demonstrated that the promotion of the cell size and cell number of leaf epidermal cells by T1-T4 might contribute to the leaf expansion. Further analysis at the molecular level suggested that the light quality affected the RNA levels of the genes involved in cell division and expansion. When tobacco seedlings reached the same biomass, T1-T4 light sources saved 71%, 86%, 80% and 89% of electric energy respectively compared with white light. Therefore, the application of specific pc-LEDs not only reduces the cost of light source production, but also saves energy consumption, offering great potential for ISR technology to cut costs and increase efficiency.
研究领域:
农业
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植物生理学
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照明技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2022
·Vol. 13
·期 1
·1-11
·
IF 17.694
Liu Jiaqi,Gong Jiangdong,Wei Huanhuan,Li Yameng,Wu Haixia,Jiang Chengpeng,Li Yuelong,Xu Wentao
Brain-inspired electronics require artificial synapses that have ultra-low energy consumption, high operating speed, and stable flexibility. Here, we demonstrate a flexible artificial synapse that uses a rapidly crystallized perovskite layer at room temperature. The device achieves a series of synaptic functions, including logical operations, temporal and spatial rules, and associative learning. Passivation using phenethyl-ammonium iodide eliminated defects and charge traps to reduce the energy consumption to 13.5 aJ per synaptic event, which is the world record for two-terminal artificial synapses. At this ultralow energy consumption, the device achieves ultrafast response frequency of up to 4.17 MHz; which is orders of magnitude magnitudes higher than previous perovskite artificial synapses. A multi-stimulus accumulative artificial neuromuscular system was then fabricated using the perovskite synapse as a key processing unit to control electrochemical artificial muscles, and realized muscular-fatigue warning. This artificial synapse will have applications in future bio-inspired electronics and neurorobots.
研究领域:
神经形态工程
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材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2025
·
IF 5.3
Qing Sun,Qingqiao Zhao,Lifang Zhang,Fengjun Ming,Weidong Zhang
Water lean solvents have received growing attention for CO2 capture due to their low solvent evaporation and potential for energy saving. The previous study mainly focused on the organic diluent selection and paid less efforts on the amine effect. In this study, 11 types of amines with representative structures were selected to explore the effect of amine on CO2 loading and CO2 distribution with poly(ethylene glycol) dimethyl ether (NHD) as organic diluent. Based on the cyclic loading and reaction heat comparison, N-ethylethanolamine (EAE) was selected and the EAE/NHD water lean solvent was constructed. The liquid–liquid phase separation was found in the EAE/NHD/H2O system with more than 95% CO2 concentrated in the lower phase, which yielded high cyclic loading and benefited regeneration energy consumption. The water content effect was further investigated in terms of CO2 cyclic loading and phase separation behaviors, suggesting that EAE/NHD/H2O with a mass ratio of 3:6:1 exhibited the excellent performance of 3.03 mol·kg–1 cyclic loading and 2.27 GJ·t–1 CO2 regeneration energy consumption. 13C NMR and quantum chemistry calculations were conducted to explain the reaction route and phase change mechanism. The large difference between the ion–dipole interaction of ion–H2O and the molecule–molecular interaction of ion-NHD was regarded as the main reason for phase separation. The long-term tests indicated the cycling stability and low corrosivity of EAE/NHD/H2O, as exhibited by the stable CO2 cyclic loading during 8 runs of absorption–desorption and lower corrosivity rate of carbon steel than 30 wt % MEA aqueous solution.
研究领域:
化学工程
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环境科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiaxin Yang,Wenju Tao,Jiaming Li,Lingyu Kong,Shaohua Wu,Jingui He,Zhaoshun Liu,Yu Sun,Chao Fan,Zhaowen Wang
Low energy consumption and environmentally friendly extraction of high value-added elements from waste aluminum electrolytes are crucial for developing potential mineral resources and reducing environmental hazards. This study aims to propose a new method for resource utilization of retired aluminum electrolytes by combining NH 4 Cl with CaO-assisted low-temperature calcination. The leaching rates of Li and Na exceed 94.67 % and 98.12 %, respectively. The optimal conditions for roasting transformation were determined to be NH 4 Cl/CaO: 2, CaO/LWE@Al: 2, T: 550 ℃, t: 1 h. In the leaching stage, liquid–solid ratio: 5, T: 45 ℃, t: 1.0 h were proved to be the most suitable experimental condition. An evaluation was conducted on the economic benefits and creativity of the process. Finally, the regenerated LiCoO 2 prepared from recycled Li 2 CO 3 has been proven to have better electrochemical performance than commercial LiCoO 2 , demonstrating the feasibility of energy storage use. The economic accounting results indicate that this novel process demonstrates significant financial and environmental benefits through high-value lithium recovery. Compared with traditional concentrated acid roasting, this low-temperature roasting method has lower energy consumption, higher element conversion rate, lower corrosiveness, and lower operational difficulty (without the involvement of strong acids/bases). Therefore, this process has been proven to be a green, environmentally friendly, low energy consumption, and high value-added method for comprehensive utilization of waste electrolytes.
研究领域:
材料科学
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环境工程
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2020
·
IF 2.87
Fengqing Xiong,Danni Chen,Chenglong Ma,Limei Cao,Ji Yang
Electrochemical oxidation has been considered as an efficient method to degrade pharmaceuticals and personal care products. Maintaining low power consumption while increasing the number of oxidation intermediates is deserving of exploring. Herein, Ti/SnO2–Sb/Zr0.3Ir0.7O2 was prepared by Zr doped into IrO2 and used for Sulfamethoxazole (SMX) degradation. The addition of Zr significantly increased the electrochemically active area and facilitated the catalyst to degrade SMX dramatically at a lower overpotential. The extremely outstanding lifetime of catalysts can reach 800 h during the accelerated life test, which showed excellent stability and developmental prospects. The overpotential at 10 mA·cm–2 is about 329 mV, indicating that this electrode has a high oxygen evolution reaction activity. Furthermore, the electrical efficiency per log order for the electrode is only 8.50 kW h m–3 at 4 V. Our research provides new anode electrochemical catalysts for the degradation of organic pollutants.
研究领域:
环境科学
·
材料科学
·
电化学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Taoqin Chen,Longqian Xu,Sheng Wei,Zhiqiang Fan,Ruibo Qian,Xueli Ren,Guo Zhou,Hongquan Yang,Jiayun Wu,Hongbin Chen
The conventional technologies for ammonia recovery from wastewaters usually requires high chemicals and energy input. And if the wastewater contains hardness, there is a risk of scaling with increasing in cost. Flow electrode capacitive deionization (FCDI) coupled with monovalent cation exchange membrane (MCEM) was employed to solve abovementioned problem. Our method was an effective strategy for the selective production of an ammonia-rich solution from coal gasification gray water by simply adjusting the charging and discharging processes. During the charging process, both NH 4 + and Na + were transported to the cathode due to electrosorption of the electrical double layers (EDLs) on charged carbon particles and electrodialysis of potential gradient, while Ca 2+ was retained by the MCEM. The Faradaic reactions induced the generation of OH - and led to the conversion of charged NH 4 + into uncharged NH 3 . When the electrode polarity was reversed, charged species such as Na + would be mostly pushed back into the spacer chamber, yet NH 3 was more likely to be trapped in the cathode due to sluggish pH variations, thereby producing an ammonia-rich solution. Under optimal operating conditions (i.e., a carbon content of 5 wt%, charge and discharge voltages of 4.5 and 0.2 V, respectively, charge 80 min and discharging 15 min, and six continuous cycles), a stable recovery efficiency (∼205 mg/L per cycle) and product purity of 70.4% were attained at a relatively low electrical energy consumption (11.1 kWh/kg N). Additionally, Ca scale was effectively avoided by MCEM. These results demonstrated that FCDI coupled with MCEM could be a promising technology for efficient NH 4 + removal, recovery as an ammonia-rich solution and TOC removal from industry wastewaters with alleviation of scaling.
研究领域:
环境工程
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Jing Wang,Jia-Wei Fang,Zhi-Yong Ji,Zhi-Yuan Guo,Xin-Wei Li,Jie Liu,Ying-Ying Zhao,Zhong Liu,Feng-Feng Gao,Yuan Zhong,Jun-Sheng Yuan
Lithium extraction from the solution in low Li + concentration by an energy-saving and high-efficiency method is still a challenge. Herein, a novel hollow porous LiMn 2 O 4 (H-LMO) with highly active site was proposed to enhance the extraction performance of Li + . Based on the established hollow porous structure, the H-LMO film electrode (H-LMOE) exhibits excellent lithium electrosorption performance and stability. Under the current density of 0.5 C, the electrosorption capacity of Li + could reach 31.52 mg/g, the separation coefficient of Li + /Mg 2+ was 581.67, and the energy consumption was as low as 0.49 Wh/mol Li. This unique structural strengthening mechanism made H-LMOE maintain a good Li + extraction performance even in a solution of low Li + concentration. The Li + electrosorption capacity of H-LMOE was 2.13 times that of T-LMOE in a 60 mg/L Li + solution, while the specific energy consumption of the H-LMOE was 15.78% lower than that of the traditional-LiMn 2 O 4 film electrode (T-LMOE). Even in a 10 mg/L Li + solution, the electrosorption capacity of H-LMOE was 21.48 mg/g, which was 10.0% higher than that of T-LMOE. Moreover, after 50 recycling processes, the final electrosorption capacity of the H-LMOE was about 25.0% higher than that of the T-LMOE.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Ying Xie,Zhixiang Xia,Chao Li,Man Mou,Ximing Hu,Wei Chen,Xiaoming Xu,Yang Xia,Zihao Liu,Mengxiang Fang
The steel industry contributes approximately 7–9 % of global anthropogenic CO 2 emissions. Chemical absorption is a promising strategy for reducing steel industry carbon emissions. MAA, a novel amine blend primarily composed of methyldiethanolamine (MDEA) and 2-(Piperazin-1-yl) ethanamine (AEP), exhibits potential but lacks industrial-scale validation. Focusing on the blast furnace (BF)-basic oxygen furnace steelmaking process, this study conducted pilot tests with MAA and 30 wt% MEA for BF gas (20 vol% CO 2 ) and top gas recycling-oxygen blast furnace (TGR-OBF) gas (35 vol% CO 2 ) and studied process modifications. The results showed that after 200 h of stable operation, MAA achieved optimal CO 2 capture from BF gas at a liquid-to-gas ratio of 8 L/Nm 3 , with a regeneration energy of 2.47 GJ/t CO 2 , compared to 3.78 GJ/t CO 2 for 30 wt% MEA. MAA achieved a regeneration energy of 1.81 GJ/t CO 2 for TGR-OBF gas, 26.72 % lower than that for BF gas. Absorber intercooling reduced regeneration energy by 8.86 %. Among the process modifications, directing 10 % of the rich solution to a flash evaporator for semi-lean solution recycling back to the middle of the absorber, with the remaining 90 % undergoing thermal regeneration in the stripper, demonstrated the lowest regeneration energy for TGR-OBF. This modification reduced MAA regeneration energy by 5.52 %. Additionally, two-stage water scrubbing effectively controlled amine emissions from the 10 Nm 3 /h pilot plant, reducing MAA emissions to 17.83 mg/Nm 3 after the second stage. MAA exhibited excellent adaptability to BF and TGR-OBF gases, achieving 90 % CO 2 removal efficiency with a minimum regeneration energy of 1.71 GJ/t CO 2 . The findings highlight the potential for the large-scale application of MAA in the steel industry to significantly reduce CO 2 emissions.
研究领域:
钢铁工业
·
环境工程
·
化学工程
✓ 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）