FUEL
·
2022
·
IF 8.035
Rui Li,Minghui Gong,Bernard Wiafe Biney,Kun Chen,Wei Xia,He Liu,Aijun Guo
As of 2020, the annual generation of municipal solid waste (MSW) in China has surged to 235.12 Mt, and food waste (FW) accounts for more than 60 %. The most common treatment method is incineration, which accounts for 62.13 %. This research proposes a three-stage pretreatment method for FW that is suitable for incineration while recovering by-products and energy from the pretreatment process. The first stage is dehydration; as compared to hot air drying (HAD) processes, freeze drying (FD) exhibits a higher dehydration and oil preservation rate, allowing for the preservation of organic matter content and the recovery of freshwater resources from FW. The second stage is oil recovery; the FW extracted oil (FWEO) can be used to produce biodiesel, and this stage also helps to improve the effectiveness of the subsequent torrefaction process. The third stage improves the energy and fuel characteristics of the organic residue of FW and enhances the combustion performance by optimizing the torrefaction temperature. The solid fuel obtained at a torrefaction temperature of 350 °C shows the best combustion performance, with a solid yield of 35.76 %, a torrefaction temperature of 300 °C might be chosen to further improve the solid yield.
研究领域:
环境科学
·
能源工程
·
废物管理
✓ 已验证
产品关联
DOI
高影响因子
Arabian Journal of Chemistry
·
2022
·
IF 6.212
Jinjian Hou,Fei Song,Xinyu Ji,Shuanglong Lin
The oily sludge would cause environment pollution, and would cause the heavy oil waste. Therefore, it was vital for us to find novel methods to obtain heavy oil from the oily sludges. In this study, the [C 12 mim][PF 6 ] and [C 12 mim][Br] ionic liquids(ILs) were used to enhance the oil recovery. The toluene could obtain the highest oil recovery, and both the two ILs could increase the oil recovery. Toluene could obtain the highest oil recovery (89.4 wt%), and n -octane could obtain the lowest oil recovery (76.8 wt%). [C 12 mim] [PF 6 ] could efficiently increase the heavy oil recovery to 91.2 wt%(by toluene). The [C 12 mim][Br] could increase the heavy oil recovery further. Both the [C 12 mim] [PF 6 ] and the [C 12 mim][Br] ionic liquids could increase the heavy ois C/H ratio, decrease heavy oil viscosity and increase the sands hydrophilicity. The [C 12 mim][Br] ionic liquids showed better effect. In addition, the ionic liquids could increase the solvents recovery, and the ionic liquids recovery were high. Therefore, the ionic liquids enhanced oil recovery could be recycled to ten times. The two ionic liquids could effectively decrease the heavy oil interaction force, and when the ionic liquids increased to 200 ppm, the force remained stable. In the end, the ionic liquids enhancing solvent extraction mechanism was put forward.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Cleaner Production
·
2025
·
IF 10
Xincheng Zhang,Juanjuan Yang,Changqing He,Ying Tian,Lin He,Hong Sui,Xingang Li
The economic and environmental treatment of oily sludges is always a challenge in industry. Herein, we propose an interfacial capture and demulsification hybrid process to deeply separate and recover the heavy oil (even over 97%) from the sludges with rejecting the encapsulated micro-/nano-mineral particles from the heavy oil phase in a low-carbon way (save energy over 69.3% compared with commercial pyrolysis). After testing over ten different oily sludges samples from petroleum industry, coal industry and steel industry, it is proved that this novel process possesses good universality, as well as high quality of products (oil, solids and water). A detailed mechanistic study by interfacial/surface characterizations approves the roles of interfacial capture of fine particles by dispersed water droplets and demulsification of asphaltenes-solids co-stabilized emulsions by a home-made oxygen-containing non-ionic demulsifier. Finally, a comprehensive evaluation has been made for this process, which demonstrates its excellent economy and environmental feasibility.
研究领域:
环境科学
·
化学工程
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
·
2022
·
IF 5.168
Yejing Gong,Li Li,Weihong Huang,Jungang Zou,Xinming Zhong,Luchuan Wang,Dingyu Kang,Zhongzhi Zhang,Zhiyong Zhang
The method of nanofluid flooding to enhance heavy oil recovery has attracted much attention in oilfields. An EOR technology named alkali - silica nanoparticle-polymer (ANP) flooding was designed to enhance heavy oil recovery. The performance of the ANP flood system on reducing interfacial tension (IFT), altering the wettability of rock surface, emulsifying and displacing heavy oil were compared with that of polymer (P), alkali - polymer (AP) and nanoparticle - polymer (NP) flood systems. Visual flooding test was conducted to investigate the displacement mechanisms of different flood systems in porous media . ANP nanofluid could remain stable over 30 days without sedimentation of nanoparticles. The emulsifying ability of the four flood systems for heavy oil followed the order: P < NP < AP < ANP. Based on the analysis of droplet size distribution of emulsion and changes of IFT value with alkali concentration, the best formula of ANP system to emulsify heavy oil was 0.3% [w/v] Na 2 CO 3 + 0.1% [w/v] silica nanoparticle + 1000 mg L −1 polymer. Electrostatic repulsion between silica nanoparticles and oil droplets played a dominated role on stabling ANP emulsion. ANP flood system could change the wettability of rock surface to a more water-wet state (contact angle varied from 85.4° to 35.6°). Core and visual flooding tests proved that ANP flood system had a better sweep and displacement efficiency for heavy oil than other three flood systems (P, AP and NP), which could enhance heavy oil recovery by 21.19% after water flooding in a sandstone core. Emulsification is the main mechanism for ANP flooding to enhance heavy oil recovery.
研究领域:
石油工程
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2018
·Vol. 124
·期 5
·1-10
·
IF 1.604
Zhang Xiaohui,Lv Ju,Yin Xueqiong,Li Zhiming,Lin Qiang,Zhu Li
Polystyrene (PS) dissolved in dichloromethane was spun to prepare the nanofibrous polystyrene membranes (NPS) through solution blow spinning with a commercialized airbrush. The influences of spinning conditions on the membrane morphology, density, and porosity were investigated. Through varying the PS concentration (8%, 9%, 10%), gas pressure (0.1, 0.2, 0.3 MPa), and acceptance distance (10, 12, 15, 18 cm), NPS with diameters of 200–1400 nm were prepared. The membranes had high porosity of 83.9%, and super-hydrophobic and super-oleophilic surface. The oil absorbency to motor oil, peanut oil, diesel oil, and heavy oil was 29.35, 27.27, 21.81, and 22.80 g/g, respectively, while that of the commercialized nonwoven polypropylene was 9.34, 9.17, 7.09, and 7.79 g/g, respectively. NPS could separate oil from water surface in several seconds. It was easy to prepare the membrane in situ on the surface of an oil/water mixture and remove the oil while peeling off the membrane, indicating NPS is potential as oil recovery material in large-area oil pollution environment.
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
CHEMICAL ENGINEERING & TECHNOLOGY
·
2020
·Vol. 43
·期 11
·2160-2166
·
IF 1.543
Shanshan Dai,Xiaojiang Li,Jihe Zhao,Hongsheng Lu
A green and effective extraction of oily sludge was completed by a hybrid process with tertiary amines (TA) and protonated tertiary amines (PTA), where PTA is the protonated state of TA. Compared with only TA, the crude oil recovery was improved by 3–5 % by the addition of PTA and less solid remained in the recovered crude oil. Additionally, the wettability improved with the absorption of positively charged ions of PTA on the sludge, and the interaction between heavy alkanes of crude oil and PTA promotes the detachment of crude oil from the sludge surface, enhancing the hydrophilicity of sludge. More importantly, the incomplete recovery of TA exactly takes the role of the PTA in the regenerated mixture, which can reduce the loss of solvent.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Wenjian Yue,Zhiyu Huang,Mengli Xiao,Xiaojiang Li,Wenjing Ma,Ying Zhang,Shanshan Dai,Hongsheng Lu
In this article, a higher fatty acid-based ternary CO2-controllable dual-circulation had been successfully constructed, where it provided an excellent oil recovery performance and all solvents could be cycled. This dual-circulation adopted the oil-soluble higher fatty acid (HFA) as the outside loop to extract oil and selected poly(propylene glycol) bis(2-aminopropylether) (Jeffamine D230) as the inner loop to impel the outside loop. In washing oil technology, D230 and HFA as cleaning solvents are ideal substitutes for traditional tertiary amines. First, there is the electrostatic interaction between HFA (represented by n-decanoic acid) and D230, as detected by 1H MNR. The circulation of the system is supported by the rapid CO2-switchable behaviors of HFA-D230, where the reversible phenomenon was recorded by a pH meter and a conductivity meter. In addition, the HFA/D230/water system has demonstrated the cyclic process of dissolving the oil in the simulated oil (the dodecane, kerosene, and diesel) recovery experiment. Finally, the n-decanoic acid (C10-HFA)/D230/water ternary dual-circulation system was obtained as the optimal scheme due to its excellent recovery and separation property. During the separation of simulated oil by using the C10-HFA/D230/water system, the recovery rate of the simulated oil was more than 93% and there was no residual n-decanoic acid by GC/MS analysis. This dual-circulation was successfully established, providing a new method to replace the traditional tertiary amine for oil recovery.
研究领域:
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Yaoyao Zhu,Yeqiang Lu,Hang Yu,Guojun Jiang,Xueting Zhao,Congjie Gao,Lixin Xue
Super-hydrophobic F-TiO 2 @PP membranes were developed from polypropylene (PP) non-woven fabric by in situ cross-linking polymerization of trifluorofluorooctyl methacrylate (FOMA) and sol–gel-derived titanium dioxide with vinyltriethoxysilane (VTES). Due to the formation of super-hydrophobic “coral”-like synapses on the filamentous surfaces of PP non-woven fabric, F-TiO 2 @PP membranes showed extremely high water contact angles up to 157° and capability of rapidly absorbing oil drops. The F-TiO 2 @PP membranes were also able to expel water from water-in-oil emulsions with robustly high oil permeate fluxes (up to 11,000 L m −2 h −1 under gravity), water removing efficiency (up to 99.7%), re-usability and long-term stability even at the presence of surfactant and salts. Such superior performance could lead to potential applications in rapid collection and efficient purification of recovered oily organic components from waste liquids or accidental oil discharges in marine or continental situations.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Zhiwei Wang,Jiannan Shi,Runqun Liu,Yu Zhang,Yunfei Zhu,Jiahong Lan,Yong Sha
For enhanced heavy oil recovery, either a conventional polymer for thickening water or a surfactant for emulsifying heavy oil has its limitation when each of two is used alone. The former can not effectively drive oil out while the latter could be inefficient in the low swept area. So, a Polymer surfactant with both good viscoelasticity and emulsification of heavy oil is of great significance. Here, by means of polyvinyl alcohol (PVA) grafting with acrylamide (AM) and 2-acrylamide-2-methyl propanesulfonic acid (AMPS), a novel polymeric surfactant PVA-g-P(AM-co-AMPS) was synthesized and the viscosity of PVA-g-P(AM-co-AMPS) aqueous solution can be as much as 27 times more than that of unmodified PVA. The degree of viscosity reduction for the four typical heavy oils can reach to above 85%. The “quasi crosslinking” structure formed by hydrophobic combination with the original hydrophilic groups may be the reason for such a result. The findings of this study can help for better understanding to a construct two-phase viscosity regulator. This polymeric surfactant could be applied in enhanced heavy oil recovery.
研究领域:
石油工程
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2023
·Vol. 15
·期 3
·638
·
IF 5
Jia Tan,Jiaming Sun,Chunhui Ma,Sha Luo,Wei Li,Shouxin Liu
The global challenge of oil pollution calls for the efficient selective recovery of oil or organics from oil–water mixtures. A pH-responsive carbon foam (CF) made from liquefied larch sawdust (LLS) with switchable wettability was fabricated in this work. After grafted with poly 4-vinyl pyridine (P4vp), the CF obtained a switchable wettability surface, which allowed the CF to exhibit superhydrophilicity and superhydrophobicity at different pH levels, respectively. The results revealed that the pH-responsive CF possessed a three-dimensional (3D) spongy-like skeleton and porous structure with a diameter between 50 and 200 µm. Thus, the pH-responsive CF could absorb 15–35 g/g of oil/organics in a neutral aqueous solution at pH = 7 and desorb all the absorbate within 40 s after immersion in an aqueous solution at pH = 1. Moreover, only about 2.8% loss was observed for organic (chloroform) absorption and recovery after reusing up to 15 cycles, which indicated promising prospects in oil and organic recovery.Keywords:switchable wettability;wood materials;carbon foams;oil recovery;oil cleanup
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
CARBON
·
2023
·
IF 10.9
Junfeng Li,Limei Dong,Dan Zhang,Xiuping Chen,Ying Xue,Yihao Guan,Yiming Li
Efficient recovery of crude oil spills is still a great challenge for worldwide due to its high-viscosity and low-fluidity. Although the application of solar-heated absorbents in accelerating crude oil recovery has achieved significant progress, solar irradiation intensity is greatly dependent on time, location and weather conditions, which greatly restrict their practical application. In order to solve this problem, a novel phase change material (PCM)-included polyurethane (PU) sponge with simultaneous solar energy conversion and storage capacity was prepared and used for crude oil removal from spill. As the oil adsorption material matrix , the polyurethane (PU) sponge was combined with mesoporous carbon spheres (MCS) first and further encapsulated myristic acid (MA) as latent heat storage material to obtain PU/MCS/MA composite PCMs. The high latent heat value (129.27 J g −1 ), large porosity, excellent solar-thermal conversion and storage capacity make PU/MCS/MA show remarkable in-situ oil viscosity reduction and it can absorb about 1.08 g cm −3 of crude oil under sunlight. Importantly, due to the encapsulation of MA, PU/MCS/MA can achieve efficient thermal storage to reduce the viscosity of crude oil via releasing latent heat at special circumstances. This study provided a potential strategy for the efficient utilization of clean energy and crude oil spills pollution treatment.
研究领域:
环境科学
·
能源材料
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Geoenergy Science and Engineering
·
2024
·
IF 0
Haotian Gao,Jianwen Hu,Mingshuo Chi,Junjie Fan,Tianhao Zhang,Wenqing Xie,Ekemini Ituen,Shuangqing Sun,Chunling Li,Songqing Hu
Enhancing the recovery efficiency of heavy oil reservoirs remains one of the foremost challenges confronting the petroleum industry. Nanoparticles have garnered considerable attention as potential oil displacement agents, drawing numerous researchers to the field. In this study, temperature-responsive SiO 2 Janus nanoparticles (JNs) were successfully prepared through the Pickering emulsion template method and atom transfer radical polymerization (ATRP) reactions. Experiments on the interfacial tension (IFT) of oil-water systems indicate that JNs exhibit good dynamic interfacial activity. Furthermore, the JNs exhibit remarkable emulsification capabilities for heavy oil, facilitating the formation of stable emulsions. Notably, the modified nanoparticles exhibit a degree of salt resistance, even up to a mineralization of 1.55 × 10 4 mg/L. Additionally, their temperature-responsive properties enable their utilization for high-temperature emulsification and low-temperature demulsification, making them well-suited for oilfield field operations. To visualize and simulate the underground oil displacement process, a microscopic displacement visualization experimental apparatus was employed. Notably, the addition of just 0.03 wt% of Janus nanoparticles resulted in a significant enhancement of the recovery rate by 16.49%. The research findings suggest that the JNs developed in this study exhibit promising application prospects and commercial value in terms of enhancing oil recovery efficiency.
研究领域:
石油工程
·
材料科学
✓ 已验证
产品关联
DOI
危险品化学品经营许可证（带存储）