GREEN CHEMISTRY
·
2023
·Vol. 25
·期 8
·3256-3266
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IF 9.8
Zhaohui Zhang,Jun Xu,Junxian Xie,Shiyun Zhu,Jun Li,Guangdong Ying,Kefu Chen
Carbon reduction targets urge people to develop potential alternatives to traditional energy-intensive kraft pulping. To address this need, this work reported a sustainable pulping technology for eucalyptus slabs based on a deep eutectic solvent (DES) consisting of benzyltriethylammonium chloride (BTEAC) and formic acid (FA). Under mild cooking conditions (T = 130 °C, t = 2.0 h), the pulp yield reached 53.83%, and fibers had a length of 0.65 mm and a fines content of 6.21%. The physical properties of DES pulp were similar to those made by other traditional processes. Meanwhile, approximately 85% of FA and 92% of BTEAC could be reused in the improved chemical recovery process, and the cooking efficiency of recycled DES was largely maintained after 5 times of recycling. Moreover, compared with the kraft process, DES pulping could extract more lignin with high purity and narrow molecular weight distribution. The results proved that this technology could produce high-quality pulp and lignin by-products simultaneously with less energy and chemical consumption.
研究领域:
林业工程
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2025
·
IF 8.4
Hongtao Liu,Xueli Wang,Wenjie Zhang,Jiawei Wen,Junlian Wang,Jianzhong Ye,Youbei Zhan,Guoyong Huang,Shengming Xu
The spent hydrodesulfurization catalyst represents a significant hazardous solid waste due to its heavy metal content, necessitating stringent treatment protocols. Current commercial treatment methodologies predominantly employ substantial quantities of hydrochloric and sulfuric acids, resulting in severe secondary pollution, including challenging wastewater treatment and excessive sulfur and carbon emissions. This study introduces an innovative acid-free process for the treatment of spent catalysts, encompassing mineral phase reconstruction, acid-free water leaching, and solvent extraction. This novel approach achieves efficient separation and recovery of molybdenum, with a molybdenum-aluminum separation coefficient of 19,258.26 and a molybdenum recovery rate of 98.95%. The purity of the molybdenum product attained through single-stage extraction is 93.83%, which increases to 99.7% with three-stage extraction. Life cycle assessment indicates that this process reduces CO 2 emissions by 42.4% and SO 2 emissions by 73.7% compared to traditional methods. From the perspectives of environmental protection, energy conservation, and carbon reduction, this advanced process holds substantial industrial applicability.
研究领域:
环境科学
·
冶金工程
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产品关联
DOI
PubMed
高影响因子
Matter
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2025
·
IF 17.5
Zhi-Guang Guo,Peng-Qi Xiong,Hai-Feng Nan,Ding-Xiang Yan,Gan-Ji Zhong,Jun Lei,Zhong-Ming Li
Radiative cooling coating (RCC) provides a sustainable pathway for thermal management. However, the spectrally engineered RCC’s thermal regulation behavior relies heavily on clear weather, limiting the development of its adaptive thermal management performance and high cooling power. Inspired by the skin’s thermo-regulation, we report a bionic skin meta-gel coating (BSMC) with an adaptive spectrum and moisture modulation capability through hierarchical structure design and localized molecular confinement engineering. Autonomous thermal regulation and high cooling power are attained for the BSMC. Compared to conventional RCC, the BSMC achieves superior cooling performance (a reduction of 4°C) at high temperatures. Conversely, the BSMC can heat a space via photo-thermal effect at low temperatures. Moreover, the BSMC addresses heat accumulation in thermal camouflage nets. According to calculations, the BSMC improves cooling power by 233 W/m 2 and significantly decreases global CO 2 emissions by 1.9 billion tons/year. The BSMC solves the bottleneck of RCCs and promotes global low-carbon development.
研究领域:
材料科学
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环境科学
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能源工程
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产品关联
DOI
高影响因子
Engineering
·
2025
·
IF 11.6
Fawei Lin,Hongyun Yao,Chujun Luan,Chenxu Zhong,Huiyi Mao,Lei Che,Hongdi Yu,Guanyi Chen,Eslam Salama,Mona Ossman,Li’an Hou
Efficient disposal of oily water pollution and oily sludge (OS) production with low energy demand has garnered significant attention for the low carbon transition of the petroleum industry. How to overcome the hardships from severe emulsion and interaction with soil minerals in emulsion–soil (OS) is a significant challenge with the prospective opportunities of solar energy substitution. This paper proposed the solar-driven photothermal conversion technology for efficient dehydration of OS and purification of oily water using a multifunctional material. A biomass-based carbon aerogel (BCA-600) with a porous three-dimensional structure and photothermal conversion characteristics was synthesized. Interestingly, this carbon aerogel possessed adjustable surface wettability, enabling it to adsorb high viscosity crude oil on the water surface (4.28 g·g −1 ) and achieve demulsification-separation in water-in-oil emulsions (97.28%) with the assistance of solar irradiation. Accordingly, the synergistic action of solar heating and separation-adsorption of emulsion by BCA-600 contributed to the efficient photothermal dehydration for both OS and emulsion. The highest dehydration efficiency for OS reached 90.68% with the OS/BCA-600 mass ratio of 10:2. Moreover, BCA-600 could remain in the dehydrated OS without separation to participate in the following pyrolysis with enhanced effects by confined-catalytic cracking, achieving a “one stone, two birds” effect. Overall, the solar photothermal approach exhibits significant potential for treating oily pollutants, reducing carbon emissions by more than 100 times compared to traditional thermal methods. This could be a strong push for the low carbon transition of the petroleum industry.
研究领域:
环境科学
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材料科学
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能源工程
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
·
IF 20.2
Hao Chen,Jia Song,Xin Long,Huanhua You,Yanhong Weng,Danni Liu,Yuanfeng Liao,Jiujun Zhang,Jing-Li Luo,Xian-Zhu Fu
It remains challenges to efficiently convert carbon-based fuels such as methanol from CO 2 into electrical energy while without CO 2 greenhouse gas emission. Herein, a CO 2 -emission free direct methanol fuel cell (DMFC) has been realized through using unique Pt-CoOOH/nickel foam anode with high electro-catalytical selectivity, activity and stability. The DMFCs demonstrate simultaneous production of 18 mol of formate for every 1 kWh of electricity output with peak power density of 49.3 mW cm −2 and high selectivity of formate value-added chemicals up to 96 %. Moreover, this simple procedure does not consume energy while output electricity compared to the traditional formate production. It either does not use the toxic feedstock of CO and the reaction conditions are very mild. The in-situ Raman test indicates that CoOOH acts as an auxiliary active site to promote the conversion of *HCO to *HCOOH and improve the selectivity of formate. In-situ IR tests and density functional theory (DFT) calculations confirm that methanol tends to be oxidized selectively into formate rather than complete-oxidizing into CO 2 . This study achieves clean and efficient utilization of carbon-based fuels to co-generate electrical energy and value-added chemicals while no CO 2 greenhouse emission, even realize the “negative carbon” cycle.
研究领域:
能源科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
ACS Agricultural Science & Technology
·
2024
·
IF 2.3
Song Zhang,Zhang Chen,Chuanxiang Cao,Yanfeng Gao
Traditional cooling strategies for greenhouses commonly result in significant electricity consumption and a substantial release of carbon dioxide emissions. Considering the industrial fabrication process for the greenhouse covering film and the thermal management theory, we developed a composite greenhouse covering film that incorporates titanium dioxide into polyethylene to achieve near-infrared reflection. The film demonstrates an impressive near-infrared reflectance of 54.4% within the wavelength range of 780–2500 nm. A tunnel-type greenhouse demo comparative test results show that the composite film can effectively decrease the average temperature inside the greenhouse by 6.7 °C in comparison to the pure polyethylene film. The reduction implies a significant annual saving in cooling electricity at the national level of 2151912.3 MW h, along with an annual CO2 emission reduction by 1250261.1 tons.
研究领域:
农业工程
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材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2024
·
IF 8
Runjie Liu,Shiwei Liu,Shichang Sun,Xing Cao,Junhao Lin,Juan Peng,Fei Ji,Rui Ma
The traditional solidification/stabilization (S/S) technology, Ordinary Portland Cement (OPC), has been widely criticized due to its poor resistance to chloride and significant carbon emissions. Herein, a S/S strategy based on magnesium potassium phosphate cement (MKPC) was developed for the medical waste incineration fly ash (MFA) disposal, which harmonized the chlorine stabilization rate and potential carbon emissions. The in-situ XRD results indicated that the Cl − was efficiently immobilized in the MKPC system with coexisting Ca 2+ by the formation of stable Ca 5 (PO 4 ) 3 Cl through direct precipitation or intermediate transformation (the Cl − immobilization rate was up to 77.29%). Additionally, the MFA-based MKPC also demonstrated a compressive strength of up to 39.6 MPa, along with an immobilization rate exceeding 90% for heavy metals. Notably, despite the deterioration of the aforementioned S/S performances with increasing MFA incorporation, the potential carbon emissions associated with the entire S/S process were significantly reduced. According to the Life Cycle Assessment, the potential carbon emissions decreased to 8.35 × 10 2 kg CO 2 -eq when the MFA reached the blending equilibrium point (17.68 wt.%), while the Cl − immobilization rate still remained above 65%, achieving an acceptable equilibrium. This work proposes a low-carbon preparation strategy for MKPC that realizes chlorine stabilization, which is instructive for the design of S/S materials.
研究领域:
环境科学
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材料科学
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废弃物管理
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DOI
PubMed
高影响因子
Materials Today Communications
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2025
·
IF 4.5
Zhiyi Guo,Xudong Wang,Athar Ali Khan Gorar,Zhongcheng Pan,Wenbin Liu,Jun Wang
A bio-based triphenol compound (GVT) was prepared using vanillin and guaiacol from biomass as starting materials. Then, 4-nitrophthalonitrile was used to obtain a new bio-based trifunctional phthalonitrile monomer (GVTP) through nucleophilic substitution reaction in a green solvent. The successful preparation of GVT and GVTP was proved by hydrogen and carbon nuclear magnetic resonance ( 1 H NMR, 13 C NMR) and Fourier transform infrared spectroscopy (FT-IR). 4-(4-aminophenoxy)phthalonitrile (APPN) was chosen as the curing agent. Tests were carried out using FT-IR, differential scanning calorimeter (DSC), thermogravimetric analyzer (TGA), dynamic mechanical analyzer (DMA), and rheometer. The results showed that the prepolymer had a wide processing window and low melt viscosity at 220.5 ℃ (0.404 Pa·s). The cured resin had a high glass transition temperature ( T g ) (402 °C). When the post-curing temperature is 375 °C, the temperatures at 5 % weight loss ( T 5 ) are 521 °C. This research offers an environmentally friendly method for effectively using bio-based aldehydes and bio monophenols, and the prepared resin offers the benefits of carbon reduction and renewability.
研究领域:
材料科学
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有机化学
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环境科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
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IF 13.273
Zhao Sun,Hanpeng Liu,Hongcun Bai,Shufan Yu,Christopher K. Russell,Liang Zeng,Zhiqiang Sun
Reducing anthropogenic CO 2 emissions has become a primary environmental concern for the present society, making the development of energy-efficient, net-negative CO 2 emitting technology paramount. Here, the Chemical looping deoxygenated gasification (CLDG) process is experimentally conducted to demonstrate the crucial role of deoxygenation on syngas refinement and CO 2 utilization via Fe 0 ↔ Fe 3+ looping. A reduction of 0.324 g CO 2 per gram pine wood biomass gasified is achieved, a 288% reduction in CO 2 emissions compared with that of biomass conversion without deoxygenation. The superiority of CLDG can be also reflected in syngas yields increased by 16.37% and a CO 2 concentration decreased by 44.16%. Results from the heat balance calculation indicate that both the gasifier and the regenerator are endothermic, which cannot achieve the auto-thermal operation of CLDG, thus requires an extra energy supply source. Density functional theory calculations elucidate that the active site of CO 2 adsorption is located at the three-phase interface of CaO(1 1 1), Fe(1 1 0), and amorphous carbon (AC). It is anticipated that CLDG has the potential to serve as an effective measure for reducing CO 2 emissions while promoting syngas yield and quality.
研究领域:
能源与环境科学
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化学工程
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产品关联
DOI
高影响因子
Advanced Science
·
2023
·Vol. 10
·期 8
·2205269
·
IF 15.1
Fei Zhu,Wei-Li Song,Jianbang Ge,Zhe Wang,Zheng Huang,Shijie Li,Mingyong Wang,Haibin Zuo,Shuqiang Jiao,Hongmin Zhu
The petroleum coke (PC) has been widely used as raw materials for the preparation of electrodes in aluminium electrolysis and lithium-ion batteries (LIB), during which massive CO 2 gases are produced. To meet global CO 2 reduction, an environmentally friendly route for utilizing PC is highly required. Here, a simple, scalable, catalyst-free process that can directly convert high-sulfur PC into graphitic nanomaterials under cathodic polarization in molten CaCl 2 -LiCl at mild temperatures is proposed. The energy consumption of the proposed process is calculated to be 3 627.08 kWh t −1 , half that of the traditional graphitization process (≈7,825.21 kWh t −1 graphite). When applied as a negative electrode for LIBs, the as-converted graphite materials deliver a competitive specific capacity of ≈360 mAh g −1 (0.2 C) compared with commercial graphite. This approach has great potential to scale up for sustainably converting low-value PC into high-quality graphite for energy storage.
研究领域:
能源材料科学
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环境科学
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电化学工程
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产品关联
DOI
PubMed
高影响因子
International Journal of Coal Preparation and Utilization
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2025
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IF 2.1
Jinwei Diao,Peng Chen,Yong Huang,Xiaoqian Zhang,Ningbo Wang,Yanan Gao,Shaoxian Song,Jianbo Li
China heavily relies on foreign oil due to limited domestic resources. Oil shortages can be effectively alleviated through Indirect Coal Liquefaction (ICL), though its conversion efficiency is constrained by the coal’s ash content. Therefore, deep de-ashing of raw coal is vital for coal pyrolysis gasification. In this study, the methods for preparing high-purity coal and its impact on coal-to-oil conversion were investigated. When the stirring speed of the hydrophobic agglomerates reached 1800 r/min, the dosage of kerosene was 3 kg/t, and the dosage of methyl isobutyl carbinol (MIBC) and starch was increased to 300 g/t, high-purity coal with an ash content of 1.87% was successfully produced. The gangue mineral (including calcite, quartz and pyrite) removal was 69%. Compared to coal before de-ashing (with an ash content of 6.22%), the carbon conversion rate of high-purity coal in the pyrolysis gasification process increased by 2.28%, the relative CO content increased by 4.49%, and the relative CO2 content decreased by 3.69%, achieving a reduction in CO2 emissions. This is great significance in realizing the double control of carbon emission intensity and total emission.
研究领域:
煤化学
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能源化工
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洁净煤技术
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化学工程
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燃料加工
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产品关联
DOI
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
·
2025
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IF 3.8
Xinying Sun,Wei Xiao,Mengying Wu,Fuqiang Liu,Jiaxin Li,Lei Liu,Jing Wu,Keke Cheng,Jianan Zhang
Microbial fermentation technology has advanced rapidly in the field of green chemical production, showcasing broad application prospects. However, current techniques still face challenges such as low carbon utilization efficiency and excessive accumulation of by-products. Additionally, during the fermentation process, carbon sources are released in the form of CO₂, leading to significant carbon loss. In this study, Enterobacter cloacae CICC 10011 was metabolically engineered to achieve the co-production of 2,3-butanediol (2,3-BDO) and lactic acid, while reducing carbon dioxide emissions and improving carbon utilization. By knocking out key genes ( pflB and iclR ), the pathways for the formation of by-products such as formate, acetate, and ethanol were attenuated, thereby optimizing carbon flux toward the target products. The results showed that under optimal fermentation conditions (aeration rate of 0.4 vvm, pH 6.5, temperature 35 °C), the double-gene deletion strain ECΔpflBΔiclR achieved lactic acid and 2,3-BDO (mixture of stereoisomers) concentrations of 51.03 g/L and 10.44 g/L, respectively, with a total target product yield of 1.76 mol/mol. Compared to the wild-type strain, the production of by-products succinate, acetate, and ethanol was reduced by 70.04 %, 47.10 %, and 89.76 %, respectively. Additionally, CO₂ emissions were reduced by 68.92 %, and carbon conversion efficiency improved by 116.16 %. This strategy provides a novel approach for carbon emission reduction and the co-production of high-value chemicals in fermentation processes.
研究领域:
微生物学
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代谢工程
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工业生物技术
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发酵工程
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绿色化学
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生物制造
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碳代谢
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）