Nanomaterials
·
2024
·Vol. 14
·期 23
·1887
·
IF 4.4
Xiaolong Qiao,Shixing Wang,Qiulian Liu,Yuanming Zhang,Guangting Han,Haoxi Ben,Wei Jiang,Haiguang Zhao,Yan Song
China is the country with the most abundant bamboo resources in the world. Using bamboo as a raw material for pulping and papermaking can save a lot of wood and protect forests. Bamboo pulping enterprises mostly adopt sulfate processes to produce a large amount of black liquor (BL), which contains monosaccharides, polysaccharides, oligosaccharides, pectin, lignin, etc. The utilization of the high-value organic matter is of great economic and environmental significance. In this study, blue-green carbon dots (C-dots) were prepared from bamboo ( Lingnania chungii ) kraft pulp BL using a hydrothermal method. The changes in carbohydrate content in BL in relation to hydrothermal temperature and hydrothermal time were discussed in detail. Then, a series of characterizations of BL-C-dots, prepared under one of the hydrothermal conditions (180 °C, 6 h), were performed and the BL-C-dots showed an excitation-dependent photoluminescence (PL) spectrum and a quantum yield (QY) of 2.9% in an aqueous solution. Finally, the as-prepared BL-C-dots were successfully used as fluorescent materials to develop an anti-counterfeiting code. The fluorescent code exhibited a clear outline, an excitation-tunable color, good stability, and high security, showing great anti-counterfeiting potential and realizing the high-value utilization of BL.
研究领域:
林业
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 25
·
IF 1.768
Zhengbin Tian,Lei Zong,Rujie Niu,Xiao Wang,Yan Li,Shiyun Ai
Conversion of lignin derived from lignocellulosic biomass to bio-oil has the promising potential to significantly reduce petroleum dependence. For that purpose, it is necessary to search for a low-cost lignin source. In this study, lignin sample was separated from straw pulping black liquor by HCl-precipitation, followed by extraction with a mixture of dioxane and water. The content of lignin in the total black liquor solid reached up to 34.8%, determined by UV spectroscopy, and the yield could account for 74.4% of the total lignin composition. The structure of lignin was investigated by various spectroscopic techniques such as FTIR, 1 H-NMR, XRD, and XPS. The structural analysis revealed that recovered lignin preserved basic lignin structure, but had relatively lower amount of β-O-4 linkages. The molecular weights were studied through THF-eluted GPC showing that separated lignin had the low M n , which was favorable for the full degradation process during conversion of lignin to bio-oil. Therefore, a feasible solution for effective utilization of lignin in straw pulping black liquor as feedstock for bio-oil was proposed in the study. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42057.
研究领域:
生物质能
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化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2016
·
IF 2.848
Jinsong He,Ping Ma,Atian Xie,Lin Gao,Zhiping Zhou,Yongsheng Yan,Jiangdong Dai,Chunxiang Li
In this work, we reported the successful conversion of the industrial SLS originated from black liquor to low-cost porous carbon with tunable microstructure and ultrahigh adsorption performance of tetracycline (TC) from water via pre-carbonation and KOH activation. Comparatively, LCA-850-4 with a very high specific surface area (2805.8 m 2 /g) and pore volume (1.45 cm 3 /g) showed a maximum adsorption of 1173 mg/g at 298 K, which was far higher than other reported adsorbents. LCA-850-4 exhibited excellent adsorption over a broad pH range. Kinetics and isotherm data was well fitted to the pseudo-second-order rate and Langmuir model, respectively. Thermodynamic parameters indicated a spontaneous and endothermic adsorption. The results are of importance to indicate LCA-850-4 with fast kinetics and excellent reusability possessed the huge potentials in practical pharmaceutical antibiotic wastewater treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2024
·
IF 5.8
Yanlong Jia,Mengyan Wang,Bolun Li,Jiang Liu,Xueping Song,Min Wu,Yongjun Yin
To solve the long-term environmental pollution caused by black liquor and waste plastics, and achieve high-value utilization, the method about co-pyrolysis of black liquid solid and waste plastics (Polypropylene, Polyethylene) catalyzed by Mo-Ni/HZSM-5 to prepare high-quality bio-oil is studied. The results found that hydrocarbons increased from 14.92% to 42.03% as Polyethylene was co-pyrolyzed with BLS, and hydrocarbons increased from 14.92% to 41.75% as Polypropylene was co-pyrolyzed with BLS, adding plastics can significantly improve the hydrocarbons yield of black liquor. Mo-Ni/HZSM-5 acts as a hydro deoxidizer in the pyrolysis of black liquid and waste plastics, the total hydrocarbons of black liquid solid, black liquid solid& Polypropylene, black liquid solid & Polyethylene increased by 6%, 78%, and 45%, respectively. An appropriate increase of pyrolysis temperature can promote the co-pyrolysis of BLS with PP, and BLS with PE, and can increase the yield of hydrocarbons. Compared with black liquor’s pyrolysis, the yield of hydrocarbons can be increased by 59.65% and 24.52% as Polyethylene or Polypropylene is adapted to pyrolysis with black liquid solid, respectively, the high-quality bio-oil is obtained because of a large number of hydrocarbons and high hydrogen content.
研究领域:
环境科学
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能源工程
✓ 已验证
DOI
高影响因子
BIOMASS & BIOENERGY
·
2022
·
IF 5.774
Yanlin Xu,Zhuoyi Liu,Bin Liu,Bin Dong,Yichuan Li,Yanpeng Li,Hailing Guo,Yongming Chai,Chenguang Liu
Pulping black liquor is a serious source of water pollution worldwide, which is very difficult to subsequently treat. Lignin is the main component of the black liquor and is the only natural aromatic recyclable resource, which is burnt as waste in the Kraft pulping industry. Designing an efficient lignin conversion catalyst that suitable for the strong alkaline environment of black liquor harbors tremendous carbon-neutral potential but still remains a scientific and technological challenge. In this work, the strong alkaline environment of black liquor was simulated, and low-cost pretreated Ni/AC catalysts were adopted to the hydrodeoxygenation (HDO) of a lignin model (guaiacol), and a breakthrough was achieved in the efficient transformation of lignin compound into hydrocarbons. By multitechniques, (e.g., FT-IR, XPS , Boehm titration, HRTEM), the relevance between introducing functional acid groups and the surface properties of catalysts was revealed. It is found that the increased acidic groups are responsible for the enhanced C (sp2) -O cleavage reactions, while improving the dispersion of Ni NPs and thus enhance the HDO efficiency. It is worth noting that better selectivity of benzene and lower hydrogen consumption are achieved on Ni/NOAC during the HDO process. Furthermore, the reaction routes of guaiacol on catalysts with different functional acid groups were proposed. This work provides guidance for efficient utilization of lignin in waste black liquor, and is of great significance to the development of sustainable carbon-neutral biorefinery and environmental protection.
研究领域:
化学工程
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环境科学
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生物能源
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Siyu Zhao,Xinrui Chen,Caixia Zhang,Peitao Zhao,Arthur J. Ragauskas,Xueping Song
Black liquor is an important pollutant in the pulp industry, but it also has the potential for high-value utilization. In this study, lignin extracted from black liquor was hydrothermally prepared into lignin-based carbon quantum dots (L-CQDs) using a one-pot method. Physicochemical characterization suggested that the L-CQDs exhibited a lamellar core–shell multilayered graphene structure surrounded by oxygen-containing functional groups. The fluorescence intensity of the L-CQDs was strengthened depending on their own concentration dependence and the doping of external groups. The fluorescence intensity of L-CQDs varied between 89.09 and 183.66 under different concentrations, and the most intense fluorescence (183.66) was obtained at 0.1 mg mL–1. At hydroxyl and amino adsorption capacities of 11.08 and 0.98 mmol g–1, the hydroxylated RL-CQDs-5 and aminated NL-CQDs-3 exhibited the highest fluorescence intensities at 689.22 and 605.39, respectively. Moreover, when pristine L-CQDs were sequentially aminated and hydroxylated, the NRL-CQDs’ fluorescence intensity reached 1224.92. Cell imaging experiments proved that cells cultivated with NRL-CQDs have brighter fluorescence compared with L-CQDs. The results will render L-CQDs more suitable for practical applications.
研究领域:
材料科学
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生物医学工程
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 109
·107970-107976
·
IF 3.289
Jiao Chen,Chao Liu,Shubin Wu,Jiajin Liang,Ming Lei
Black liquor is an attractive option for the generation of biofuel and fine chemical intermediates. In this work, kraft lignin was extracted from black liquor and its potential was evaluated in the production of high quality bio-oil via catalytic pyrolysis under two different reaction regimes (N2 and 10% H2 in N2). The 2D HSQC NMR result showed that the lignin obtained directly through acidic precipitation with CO2 mainly consisted of syringyl lignin units and cross-linked C–C bond substructures. The thermal decomposition of the sample mainly occurred at 200–500 °C and the char yield was 44.46% at 700 °C. The catalytic pyrolysis experiment indicated that the addition of catalysts (NiO, MoO2, and Co3O4) could inhibit char formation and enhance the properties of bio-oil by removing oxygenated compounds via releasing CO and CO2 under a N2 atmosphere. The addition of the catalysts could prompt lignin degradation and increase the yield of bio-oil in the presence of H2. The yield of bio-oil increased by 26.38% with Co3O4 catalytic pyrolysis under a H2/N2 atmosphere.
研究领域:
能源与环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
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2024
·Vol. 31
·期 13
·8279-8293
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IF 4.9
Hu Songnan,Li Peiyuan,Zhang Saisai,Huang Liulian,Chen Lihui,Hu Hui-Chao
The pulp industry, one of the oldest and largest chemical industries globally, plays a critical role in biomass utilization. Increasing kraft pulp yield has long perplexed researchers and engineers. Given that methyl mercaptan (MeSH) can be self-produced during the kraft pulping process, revisiting MeSH-assisted yield enhancement technology offers great attraction for pulp industry. MeSH’s strong nucleophilicity enables its consumption through both demethylation and non-demethylation reactions. Investigating the MeSH’s evolution at typical pulping conditions is crucial for achieving higher recovery rate of MeSH. This study found that higher pulping temperatures, increased alkali charge, and larger Na 2 S ratios improve the recyclable residual MeSH content in black liquors, increasing it from 17 to 36%. Under moderate pulping conditions, the residual MeSH content was approximately 30% of the original MeSH. Dimethyl sulfide (DMS), a valuable demethylation product of lignin or hemicellulose by MeSH, was found in black liquors at levels up to 15% of the original MeSH. Approximately half of MeSH participated in non-demethylation reactions and could not be recycled. X-ray photoelectron spectroscopy (XPS) analysis of separated kraft lignins suggested the generation pathway and chemical structure of new methylsulfur (MeS)-containing lignin. For economic balance and profitability, DMS recycling is proposed as cost compensation, or by adopting partial MeSH-assisted kraft pulping in batch digesting systems.
研究领域:
化学工程
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生物质利用
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制浆造纸工业
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Ming Huang,Wei Cai,Liang Zhu,Jie Li,Zhongqing Ma
Kraft lignin (KL), isolated from black liquor, serves as a significant feedstock for the production of bio-aromatics by catalytic fast pyrolysis (CFP). First, the influence of pH on the chemical structure of KL isolated by the gradient acid precipitation (GAP) was investigated. Then, the dual-catalyst CFP (DC-CFP) was employed to convert KL into light aromatics by using the hierarchical Nb 2 O 5 (Hie-Nb 2 O 5 ) and the microporous HZSM-5 as catalyst. Results showed that the decrease of pH during GAP promoted the breakage of the ether bond of KL, resulting in lower molecular weight and less content of hydroxyl group in KL. Among the four types of metal oxides (Hie-Nb 2 O 5 , Al 2 O 3 , MgO, and CaO), the synergistic effect of dual-catalyst grouped by Hie-Nb 2 O 5 and HZSM-5 was best for the production of light aromatics. In addition, the maximum production of light aromatics was reached at the pH of 2 and the mass ratio of Hie-Nb 2 O 5 -to-HZSM-5 at 2:2.
研究领域:
化学工程
·
生物质能
✓ 已验证
产品关联
DOI
高影响因子
BIOMASS & BIOENERGY
·
2025
·
IF 5.8
Lanjun Liu,Changqing Cao,Yuhan Du,Naveed Ramzan,Peigao Duan
This study investigated co-gasification of municipal sludge (MS) and black liquor (BL) in supercritical water for hydrogen production and pollution handling. The influence of the blending ratio (0–100 %), alkali content of BL (10 %, 20 %), reaction time (5–40 min), reaction temperature (400–600 °C) and total concentration (5-20 wt%) was investigated through thermodynamic analysis and experimental study. Thermodynamic modelling showed that MS addition increased the hydrogen fraction, but reduced the yield of other gas components. A synergistic enhancement was observed in MS/BL co-gasification, and the gasification efficiency had the highest improvement with MS/BL ratio of 40:60. Co-gasification also reduced N-containing compounds and alkylphenols in the liquid residue but increased phenol content. Increasing the alkali content of BL to 20 % boosted the synergistic effect, and shifted the optimal ratio to 50:50. The extension of reaction time from 5 to 20 min improved the gasification efficiency and hydrogen production, but further extension beyond 20min showed little impact. Increasing temperature favored the gasification, and the highest gasification efficiency (118.57 %), hydrogen yield (18.73 mol/kg) and COD removal rate (97.97 %) were obtained at 600 °C. These parameters showed different impact on the cold gas efficiency, H 2 selectivity and heating value of the gas product, where temperature exhibited highest influence.
研究领域:
环境科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2022
·
IF 9.879
Can Jiang,Huahao Shen,Xiaoyun Bi,Zuhao Wang,Manzhao Yao,Yanguang Wu,Liqun Zhang,Peng Yu
In rubber industry, lignin has been investigated as a potential alternative of fossil-derived carbon black (CB) for several decades. However, due to poor dispersity, big particle size and incompatibility with rubber, lignin cannot achieve the same reinforcing effect as CB by direct dry mixing. Here, a new and green dual-phase carbon-silica nanohybrid (LDPCS) was successfully prepared from black liquor lignin (BLL) and sodium silicate through a simple co-gelation/self-assembly and carbonization process. The preparation mechanism and process as well as the morphology and properties of LDPCS were investigated and discussed in detail. The results indicated that the hydroxymethylation and silane modification of BLL could improve its affinity with SiO 2 sols, thus facilitating the co-gelation of BLL and SiO 2 sols to inhibit the growth of SiO 2 particles. During subsequent acid precipitation, silane modified hydroxymethylated BLL (SiHM-BLL) was self-assembled around SiO 2 particles to form nanosized SiHM-BLL-SiO 2 hybrids. After carbonization, SiHM-BLL-SiO 2 nanohybrids were converted into LDPCS with small primary particle size of 60–90 nm, high specific surface area of 82.19 m 2 /g, relatively loose secondary aggregation structure and graphitic microcrystals in the carbon framework. With incorporating LDPCS into styrene-butadiene rubber (SBR) by direct dry mixing, LDPCS showed a superior reinforcing capability for SBR as compared with CB, which was ascribed to the nanoscale dispersion of LDPCS, robust C/SiO 2 interfaces and high affinity with SBR matrix. This work provided a new insight into the fabrication of novel hybrid nanofiller from lignin and broadened the potential applications of lignin in rubber compounds and beyond.
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
Advanced Sustainable Systems
·
2024
·
IF 6.5
Yan Gao,Yanan Wang,Yujie Cao,Yajie Hu,Guantao Wang,Mingguang Han,Sida Luo
Macroscopic 3D-controllable graphene (3D-CG) architectures not only retain the intrinsic properties of graphene sheets but also exhibit structural advantages for pollutant adsorption and energy storage. This paper proposes a novel hybrid powder-based additive manufacturing method to fabricate 3D biomass-derived laser-induced graphene (3D B-LIG) structures with customizable geometries and microporous features. This method utilizes two waste sources as feedstock precursors for sustainable graphene production: “black liquor” (sodium lignosulfonate, NaLS) and “white pollution” (polypropylene, PP). Employing a computer-aided design process, this method allows for the synchronous creation of various freeform macrostructures, with either identical or variable sections. To optimize the formability and processing efficiency of 3D B-LIG, systematic studies have been conducted. These studies establish the relationship between processing parameters and the resulting structures by controlling the laser parameters and the mixing ratio of NaLS and PP. By leveraging tunable microporous structures with a maximized specific surface area of 485.3 m 2 g −1 , 3D B-LIG demonstrates exceptional performance in pollutant adsorption (with a maximum adsorption capacity of 283.3 mg g −1 for methylene blue) and energy storage (with a gravimetric specific capacitance value of 194.9 F g −1 ).
研究领域:
材料科学
·
环境科学
✓ 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）