Effect of ambient temperature and water content on emulsified heavy fuel oil droplets evaporation: Evaporation enhancement by droplet puffing and micro-explosion

Chen, Xiaoyu; Xi, Xi; Xiao, Ge; Zhang, Lenan; Wang, Zixin; Long, Wuqiang

doi:10.1016/j.fuel.2022.126614

Cited by 16 publications

(7 citation statements)

References 47 publications

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“…It is mainly because the emulsified crude oil can disperse into smaller droplets, which can plug the narrow channels during flooding. As a result, the flooding system can achieve a larger microscopic sweep volume based on water flooding, leading to improved oil recovery. − To investigate the emulsification effect of the composite system consisting of BN and LSW on crude oil, emulsification experiments were carried out in four systems of the Mahu formation water, LSW, BN solution, and the BN–LSW composite system. The experiments were conducted at an experimental temperature of 34 °C with an oil–water ratio of 1:9.…”

Section: Resultsmentioning

confidence: 99%

Black Nanosheet-Enhanced Low-Salinity Water System for Improving Oil Recovery in a Low-Permeability Conglomerate Reservoir

et al. 2023

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Black nanosheets (BNs) and low-salinity water (LSW) flooding are two effective methods for improving oil recovery in low-permeability or ultra-low-permeability petroleum reservoirs. The former focuses on emulsification and interfacial tension reduction, while the latter focuses on wettability alteration. Combining BN with LSW is expected to achieve dual effects in oil recovery. However, there has been no research on the combination effect of BN and LSW on conglomerate reservoirs. Therefore, this study aims to investigate the oil imbibition mechanism of the BN–LSW composite system in the tight reservoir of Mahu Oilfield. The interfacial properties of the BN–LSW composite system were evaluated in terms of the oil–water interfacial tension, crude oil emulsification capability, and three-phase contact angle between oil, water, and rock. Through the imbibition experiment of the natural cores in Mahu Oilfield, the imbibition differences between single systems and the BN–LSW composite system were compared. The results showed that the BN–LSW composite system had minimal impact on the interfacial tension between oil and water compared to formation brine, LSW, and BN solution. However, the composite system demonstrated a significant emulsification effect with Mahu crude oil and alterated the wettability of the core. Compared to the single systems, the imbibition rate of the BN–LSW composite system was higher, resulting in an improved imbibition effect. The NMR T 2 signal explained the synergistic core imbibition effect of the BN–LSW composite system at the microscopic scale. The research outcomes of this study can provide a new approach for developing low-permeability and ultra-low-permeability reservoirs, holding practical value and reference significance.

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Section: Resultsmentioning

confidence: 99%

Black Nanosheet-Enhanced Low-Salinity Water System for Improving Oil Recovery in a Low-Permeability Conglomerate Reservoir

et al. 2023

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“…For more information on the image processing method and the analysis of experimental uncertainties, please refer to Ref. 30 , 35 .…”

Section: Experimental Methodsmentioning

confidence: 99%

Experimental investigation on enhanced combustion of methanol/heavy fuel oil by droplet puffing at elevated temperatures

Chen,

Long,

Wang

et al. 2024

Sci Rep

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To achieve high-efficiency combustion of heavy fuel oil (HFO), this study investigated the combustion characteristics of methanol/HFO droplets with methanol content from 10 to 30% using the suspension method under ambient temperature from 923 to 1023 K. The combustion of methanol/HFO droplets was summarized as a two-phase process consisting of six typical stages, emphasizing liquid phase. Especially, the fluctuation evaporation stage, induced by frequent and intense puffing, was identified as prominent character. Both the ignition delay and lifetime of HFO and methanol/HFO droplets decreased with increasing ambient temperatures. For the methanol/HFO droplet, the ignition delay and droplet lifetime increased with the increasing methanol content. Prominently, compared to HFO, HM10 had the most significant reduction in droplet lifetime and TINL under the same operating conditions, which indicated that the addition of 10% methanol accelerated the combustion process and reduced soot generation. Additionally, the thermos-dynamic characteristics of methanol/HFO droplets were investigated. Puffing was primarily attributed to superheating of methanol and pyrolysis of heavy components in HFO, which resulted in active and passive rupture of bubbles. Similarity and maximum deformation were employed to qualitatively distinguish between them. The obtained findings aimed to develop a promising alternative fuel to reduce emissions and preserve energy.

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“…particularly the use of pesticides and fertilizers [14]. Or it may be attributed to the increase in evaporation processes with the rise in temperatures, which leads to an increase in the concentration of heavy metals [15].…”

Section: Cadmium (Cd) Concentration In Watermentioning

confidence: 99%

Use Unio Tigridis as a Bioindicator of Heavy Metal Contamination in the Diwaniyah River

Omran,

Khoen

2023

IOP Conf. Ser.: Earth Environ. Sci.

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The current study aims to estimate the concentrations of lead and cadmium in the water of the Diwaniyah River, based on investigation and study of the concentrations of these elements within the body of the vital indicator, where this organism will be taken from 4 different stations with varying distances to know the concentrations and compare them with the national determinants. The study showed that the main sources of pollution the water of the Diwaniyah River is due to the river’s passage within the city center and the discharge of sewage into it directly and in the role of a treatment agent and throwing waste of all kinds and the increase of human activities in the center, which causes an increase in the concentration of pollutants, including heavy elements. Highly efficient treatment units to reduce pollutants that are disposed directly into the river water, as well as increasing the environmental awareness of the population.

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Effect of ambient temperature and water content on emulsified heavy fuel oil droplets evaporation: Evaporation enhancement by droplet puffing and micro-explosion

Cited by 16 publications

References 47 publications

Black Nanosheet-Enhanced Low-Salinity Water System for Improving Oil Recovery in a Low-Permeability Conglomerate Reservoir

Black Nanosheet-Enhanced Low-Salinity Water System for Improving Oil Recovery in a Low-Permeability Conglomerate Reservoir

Experimental investigation on enhanced combustion of methanol/heavy fuel oil by droplet puffing at elevated temperatures

Use Unio Tigridis as a Bioindicator of Heavy Metal Contamination in the Diwaniyah River

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