JOURNAL OF SURFACTANTS AND DETERGENTS
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2018
·Vol. 21
·期 5
·657-665
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IF 1.454
Shishi Pang,Wanfen Pu,Chongyang Wang
Crude oil properties significantly affect foam behavior that is important to foam application in enhanced oil recovery. This study focused on the comparison on foam behavior in the presence of light oil and heavy oil. Foamability and foam stability, the bubble size, and the film thickness as well as the configuration of oil drops were fully investigated. Final results indicated that both the heavy oil and light oil increased the foamability of sodium dodecyl sulfate but decreased that of the amphoteric surfactant imidazoline. The positive effect of both light oil and heavy oil on foam stability was reconfirmed. However, heavy oil was more favorable to foam stability. The light oil may shorten the foam half-life but prolong the foam drainage half-life. The heavy oil was more effective in reducing the foam size and increasing the foam uniformity compared with light oil. According to the micrograph of foam, light oil was emulsified into quite small oil droplets, filling the plateau borders and lamellas. The heavy oil, in the form of far larger oil droplets, was mainly distributed in plateau borders only. The larger oil droplets resulted in the more stable foam, which was verified. Moreover, light oil (oil B) performed well in thickening the foam film, as did the heavy oil (oil A). But for the lightest oil (oil C), a thinning effect on the film was detected.
研究领域:
石油工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2016
·
IF 1.207
Jianwei Li,Xiang Li,Yan Liu,Jie Zhang
The application of ionic liquids as alternatives to conventional organic solvents in the extraction process has been investigated. In the present study, fourteen species of imidazolium-based ionic liquids were added into the NaOH (aq) to remove the mercaptans. The influences of anion species and cation alkyl chain length of the imidazolium-based ionic liquids on the performance of mercaptan removal from light oils have been discussed. The efficiency of extraction for mercaptans exhibited the order of [Ac] − > [OH] − ≈ [Br] − > [BF 4 ] − . The longer alkyl chain imidazolium-based ionic liquids contributed to enhance desulfurization rate of 1-butyl mercaptan. 100% desulfurization rate of 1-butyl mercaptan was achieved by the anion of Ac − ionic liquids and NaOH (aq) at a volume ratio of 40:1 ( V (oil): V (ionic liquid)) and a short equilibrium time within 10 min.
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 Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Fan Zhang,Haipeng Yu,Linghao Li,Hong Wang,Zhen He,Enchen Jiang,Yan Sun,Zhihe Li,Weiming Yi,Xiwei Xu
As a novel pretreatment method, a deepeutectic solvent (DES) can effectively deconstruct lignocellulose to promote its selective saccharification. In this research, biomass light oil (BL-oil) and choline chloride (ChCl) were employed to prepare a novel, low-cost imitative DES to boost pyrolytic saccharification of corn stalk (CS). The physical–chemical properties of original CS and pretreated samples were investigated. Furthermore, the influence of mass ratio of BL-oil and ChCl as well as pretreated temperature on pyrolytic product distribution was studied. The results showed that the imitative DES had a similar pretreated effect to commercial DESs, which can destroy the structure of CS to facilitate the degradation of hemicellulose and lignin. In addition, the imitative DES was more conducive to removal of alkali metals and alkaline earth metals. The yield of levoglucosan increased from 2.59 to 59.87 mg/g under the optimum imitative DES pretreated condition. The preparation and utilization of a biomass-derived imitative DES broadened the application of biomass pyrolysis oil and realized the “closed-loop” concept of biorefinery.
研究领域:
化学工程
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生物工程
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可再生能源
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Yiwen Wang,Xiangyu Liu,Qingdong He,Hang Lu,Fang Guo,Yujie Zhang,Wenbo Wang
Producing clean water by the harmless treatment of complex wastewater containing oils and organic pollutants (e.g., dyes) is highly desirable, but the major challenge is the lack of a simple, effective and low-cost way to remove simultaneously heavy oil, light oil and dyes. Here, we designed and constructed a three-dimensional architecture (3D-A) composed of the hydrophilic or hydrophobic functionalized copper mesh (as the upper layer) and the sisal fiber felts (SFs) modified with Mg/Fe-LDH or magnesium silicate (MgSi) (as the bottom layer), and confirmed that clean water was produced through filtering complex wastewater with the 3D-A in one step. For heavy oil/dyes wastewater, the dye solution in it can be trapped by hydrophobic mesh, while heavy oils passed through the mesh. The heavy oils were collected, while the dye solution flows into the light oils/dye mixed solution for further separation. The hydrophilic mesh may trap light oils in light oil/dyes wastewater, and allow dye solution to penetrate the mesh by gravity with a stable high flux [>18000 L/(m 2 ·h)] and high oil–water separation efficiency of 99%. The light oils were collected, while the dye solution flows into the modified SFs layer. The Mg/Fe-LDH modified SFs and MgSi-modified SFs can capture above 99.9% of Congo red (CR) and Methylene blue (MB) dyes, respectively to obtain clean water, and each kilogram of Mg/Fe-LDH@SFs and MgSi@SFs adsorbents can treat 9400 and 18000 kg dye wastewater, respectively. The meshes are very stable and antifouling, and can resist acid and alkaline condition (pH 1 ∼ 13), as well as mechanical scratch. The 3D-A also shows high efficiency in purifying real oily emulsion wastewater from the iron and steel industry to produce clean water, and the used SFs can be easily regenerated for cyclic use in purification of dye wastewater.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Ning Gao,Yunbo Wang,Huixin Luo,Yingtong Xu,Jining Liu,Yingwen Chen
The accumulation of oily waste increases annually with the growth in crude oil demand. Its toxicity and high heating value present both opportunities and challenges for treatment technologies. In recent years, the emergence of hydrophobic deep eutectic solvents (HDES) has promoted advancements in low-toxicity extraction processes. Leveraging the advantages of HDES and addressing the challenges posed by real oily sawdust (with a 67.9 % oil content), this study presents a novel green HDES solvent composed of ethyl maltol and fatty acids, accompanied by a corresponding extraction process. At a low temperature of 60 °C, the process achieved impressive results: an oil extraction efficiency close to 86.3 %, a dehydration rate exceeding 92.2 %, and a heavy metal removal rate ranging from 15 % to 75 %. In the exploration of solvents recycling, pH-switching facilitated the deprotonation and protonation of phenol-fatty acid HDES, promoting effective recovery of the oil phase. Even after 5 cycles, the oil extraction rate could still be maintained above 75 %. It is worth noting that the regenerated HDES exhibited greater selectivity for extracting light oil after multiple uses. The total ratio of saturated and aromatic hydrocarbons reached approximately 81.7 %, significantly enhancing the value of the recovered oil. Integrating systematic characterization with the extraction performance, as well as the variation in recovered oil phase components, highlighted the multifaceted effects of introducing ethyl maltol. Specifically, this effect is demonstrated in its ability to enhance the oil phase’s solubility by regulating the intermolecular spacing of HDES, and to impede the dissolution of heavy oil into its gaps by optimizing the local zone through the formation of complexes with HDES and heavy metals.
研究领域:
环境科学
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化学工程
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可持续化学
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废物管理
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2022
·
IF 11.889
Chao Liu,Bingyang Liu,Xing Wang,Zhanghong Xie,Lili Tong,Xiangchen Kong,Yuyang Fan,Rui Xiao
Tandem strategy for lignin utilization with photocatalytic preoxidation and ultrasonic cavitation depolymerization was proposed. Cornstalk residual lignin from industrial bioethanol process was first photocatalytically preoxidized under visible light by g -C 3 N 4 and WO 3 / g -C 3 N 4 / h -BN (WCB) photocatalysts respectively, then obtained lignin samples were characterized to confirm the preoxidation with raw lignin as a blank. During photocatalytic preoxidation, benzyl hydroxyls in lignin was transformed to carbonyls, but a certain degree of lignin degradation and condensation was observed. In comparison, WCB-catalyzed photopreoxidation was more effective. Thereafter, lignin depolymerization was achieved by ultrasonic cavitation-assisted ethanololysis under optimal conditions. Compared with the mere ultrasonic cavitation depolymerization of pristine lignin, WCB-induced photocatalytic preoxidation improved the conversion rate by 14%, the light-oil yield by 26%, and the phenolic monomer yield by 35%. In general, the reported tandem method worked very well for the enhancement of lignin depolymerization and provided a new idea for the development of lignin valorization.
研究领域:
化学工程
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Hongyi Shu,Chuang Wang,Liu Yang,Dongcang Sun,Changtong Song,Xianhong Zhang,Dong Chen,Yuhong Ma,Wantai Yang
Nowadays, effluent treatment is a severe challenge mainly because of its complex composition, which includes oil, heavy metal ions, and dyes. Developing new intelligent membranes is one of the strategies to tackle these significant challenges in wastewater treatment . In this study, we fabricated asymmetric polyethylene glycol terephthalate (PET) membranes by grafting cross-linked poly (itaconic anhydride) (CL-PITA) nanoparticles onto the irradiated face. These nanoparticles were then functionalized with polyethyleneimine (PEI) and protonated with HCl to introduce numerous active electropositive amine groups. The fundamental purpose was to increase surface roughness, introduce numerous hydrophilic groups, and modify it to create a multi-functional PET membrane to separate complex environments. The promising results demonstrated that the protonated PET- g -ITA/DVB (10) -cat membrane exhibited excellent separation efficiencies (SE) for water/light oil, water/heavy oil and oil-in-water (O/W) emulsion. Compared to PET- g -ITA/DVB (0) -cat, it showed superior performance in SE for O/W emulsion and flux decay for water/light oil after 10 cycles. More interestingly, owing to numerous positively charged active amino groups and negativley charged carboxylate groups, the intelligent membrane exhibited a high removal rate of ca. 90 % for anionic dye (congo red) and heavy metals (Cu 2+ and Co 2+ ), showing great potential in complex water treatment environments.
研究领域:
环境科学
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材料科学
·
水处理
·
膜技术
✓ 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）