scholarly journals Investigation of crude oils compatibility and relationship with their properties

2019 ◽  
Vol 20 (K8) ◽  
pp. 35-41
Author(s):  
Huynh Minh Thuan ◽  
Nguyen Manh Huan ◽  
Vo Thi Thuong ◽  
Nguyen Thi Nhi ◽  
Tran Ky Anh ◽  
...  
Keyword(s):  
Crude Oil ◽  
Chemical Properties ◽  
Crude Oils ◽  
Asphaltene Precipitation ◽  
Physical Chemical ◽  
Physico Chemical ◽  
Wax Content ◽  
Oil Tanks ◽  
The Relationship

The compatibility/incompatibility of crude oils will affect the asphaltene precipitation and finally for sludge deposition if such oils are storaged or blending together. Normally, the refineries process a mixture of several crude oils owing to economic, technical and political aspects. In this study, four crude oils were characterized and investigated in order to determine physical-chemical properties and insolubility number (IN) and blending solubility number (SBN). The result revealed that two pair of crude oils are fully compatible and the remaining are partly compatible. The volume limitation of each crude oil in the mixture is proposed. In addition, the relationship between the compatibility and physico-chemical properties of crude oils is discussed. In fact, the crude oil which possessed high wax content and low resins to asphaltenes ratio possesses low stability. This finding might provide a new and valuable strategy for solving the foulings in crude oil tanks and processing units in refineries.  

Prediction of physical-chemical properties of crude oils by 1 H NMR analysis of neat samples and chemometrics

2012 ◽  
Vol 50 (11) ◽  
pp. 729-738 ◽  
Author(s):  
Alice Masili ◽  
Sonia Puligheddu ◽  
Lorenzo Sassu ◽  
Paola Scano ◽  
Adolfo Lai
Keyword(s):  
Chemical Properties ◽  
Crude Oils ◽  
Nmr Analysis ◽  
H Nmr ◽  
Physical Chemical

scholarly journals Physico-chemical properties of Dhepa River in Dinajpur District of Bangladesh

2015 ◽  
Vol 6 (1) ◽  
pp. 59-67
Author(s):  
K Rakiba ◽  
Z Ferdoushi
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Ph Value ◽  
Sampling Site ◽  
Chemical Properties ◽  
Quality Parameters ◽  
P Concentration ◽  
Physical Chemical ◽  
Physico Chemical ◽  
Buffer Condition

Among different water quality parameters dissolved oxygen, transparency, pH, PO4-P and depth varied significantly among the sampling sites. The pH value in the present investigation remained a buffer condition (6.50- 7.90). Dissolved oxygen was ranges from 3.80 to 11.60 mg/l throughout the study periods. PO4-P concentration was observed highest (0.30 mg/l) in sampling site 2. On the basis of physical, chemical aspects sampling site 3 and sampling site 5 (situated in gosaipur and chandandoho) found in better condition in terms of limnological aspects. However, it could be concluded that Dhepa River will play important role in riverine fisheries and for further fisheries management.DOI: http://dx.doi.org/10.3329/jesnr.v6i1.22041 J. Environ. Sci. & Natural Resources, 6(1): 59-67 2013

scholarly journals Geomorphic Classification and Assessment of Mangrove Degradation in the Henry’s and Patibania Island, South Western Sundarban

2020 ◽  
Vol 3 (9) ◽  
pp. 111-115
Author(s):  
Debasmrity Mukherjee ◽  
Ashis Kumar Paul
Keyword(s):  
Chemical Properties ◽  
Environmental Parameters ◽  
Bottom Current ◽  
Gis Analysis ◽  
Humid Climate ◽  
Remote Sensing Technique ◽  
Physico Chemical ◽  
Tidal Estuaries ◽  
The Relationship ◽  
Mangrove Degradation

The coast of Henry's island, extending from Saptamukhi River in the east to Bakkhali River in the West. In the hot and humid climate of the Sundarban, a negligible input of fresh water through tidal creeks, high evaporation rate at the surface area are the probable reasons behind the evolution of Hypersaline patches of Henry's and Patibunia Island. The dense salt patches develop in the abandoned portion of the surface then sinks and move out of the tidal estuaries as subterranean flow or a bottom current to make the environment more saline. Development of Saltpan is one of the major hindrances for the growth of mangroves and hampers the ecological balance of Sundarban. Present paper attempts to highlight- I) To study and identification of Geomorphological settings of both island. ii) Analysis of Physico-chemical properties of hyper saline soil. iii) Identification of hyper-saline patches and their impact on mangrove degradation. Application of remote sensing technique and GIS analysis help to find out the relationship between mangrove degradation and salinity within the islands area in the last few decades. Development of hyper saline patches and changing environmental parameters are how much responsible for the mangrove degeneration process are major issues of this paper. The Forest Department has attempted to restore the growth of mangrove and improve fragile ecosystem but without understanding the geomorphology and environmental condition, it is not possible to implement proper managemental strategies for wetland restoration process.

scholarly journals ALKALINE EARTH METAL AZIDES. THE WAYS OF OBTAINING. PHYSICO-CHEMICAL PROPERTIES. PERSPECTIVES OF APPLICATION

2017 ◽  
Vol 17 (2) ◽  
pp. 190-200
Author(s):  
A.A. Mokrov ◽  
I.K. Kukushkin ◽  
E.M. Bykonya ◽  
P.P. Purygin
Keyword(s):  
Alkaline Earth ◽  
Chemical Properties ◽  
Earth Metal ◽  
Alkaline Earth Metal ◽  
Physical Chemical ◽  
Physico Chemical

Physical-chemical properties of alkaline earth metal azides are considered inthis article in detail. Possibilities of wide use of the substances is shown, familiarways of obtaining it are examined.

scholarly journals Mycoflora of Crude Oil Polluted Soils of Ukwa West of Abia State Nigeria

2021 ◽  
pp. 1-9
Author(s):  
J. M. Madu ◽  
A. I. Ogbonna ◽  
C. I. C. Ogbonna
Keyword(s):  
Crude Oil ◽  
Soil Sample ◽  
Critical Role ◽  
Organic Matter Content ◽  
Chemical Properties ◽  
Polluted Soil ◽  
Soil Samples ◽  
Polluted Soils ◽  
Physico Chemical ◽  
Starch Agar

Aim: Bioremediation of soil play a critical role in removing pollutants from crude oil polluted soil. To investigate the mycoflora of crude oil polluted area of Ukwa West Local Government in the present Abia State. Methodology: Portions of the soil samples collected from three (3) locations were plated out separately on Yeast Starch Agar, Starch Agar, and Cellulose Agar using soil plate methods. The culture plates were examined after 5-7 and 14 days for the presence of fungi. Pure cultures of the isolates were obtained by subculturing and the physico-chemical properties of the soil samples were determined using standard methods. Results: Twenty species (20) of fungi were isolated from the crude oil polluted soil sample and represented by their respective genera. Eight (8) species of Aspergillus representing 40%, two (2) species of Thermomyces representing 10% each, and one (1) species of Penicillium, Cladosporium, Cunninghamella, Curvularia, Trichoderma, Scopulariopsis, Sporotrichum and Basipetospora representing 5% each. Aspergillus species were predominant which include among others A. fumigatus, A. niger, A. parasiticus, A. oryzae, A. terreus. The physico-chemical properties of the soil sample were found to be varied and have affected the distribution and population of fungi. The pH values ranged from 4.81- 5.58 as compared to the control ranging from 5.72- 6.50 for soil samples A, B and C. The moisture content values ranged between 26.46-29.59% as compared to the control ranging from 29.41-32.51%. The soil was found to be high in organic matter content with values of 70.3-82.7% as compared to the control which was 94% for each of the locations. Conclusion: Crude oil polluted soils of Ukwa West of Abia State, Nigeria is rich in fungal biodiversity with the soil’s samples having different physico-chemical properties.

scholarly journals On the relationship between the structural and volumetric properties of solvated metal ions inO-donor solvents using new structural data in amide solvents

2018 ◽  
Vol 20 (21) ◽  
pp. 14525-14536 ◽  
Author(s):  
Daniel Lundberg ◽  
Dorota Warmińska ◽  
Anna Fuchs ◽  
Ingmar Persson
Keyword(s):  
Metal Ions ◽  
Chemical Properties ◽  
Structural Data ◽  
Volumetric Properties ◽  
Physico Chemical ◽  
Solvated Metal Ions ◽  
The Relationship

The relationship between the structural and volumetric properties of ions in solvents with different physico-chemical properties has been studied for 19 cations and six anions in six solvents.

scholarly journals Mosaic representations of odors in the input and output layers of the mouse olfactory bulb

2018 ◽  
Author(s):  
Honggoo Chae ◽  
Daniel Kepple ◽  
Walter G. Bast ◽  
Venkatesh N. Murthy ◽  
Alexei Koulakov ◽  
...  
Keyword(s):  
Olfactory Bulb ◽  
Chemical Space ◽  
Chemical Properties ◽  
Cell Responses ◽  
Physical Chemical ◽  
Response Variance ◽  
Chemical Descriptors ◽  
Stimulus Features ◽  
Odor Space ◽  
The Relationship

AbstractThe elementary stimulus features encoded by the olfactory system remain poorly understood. We examined the relationship between 1,666 physical-chemical descriptors of odors and the activity of olfactory bulb inputs as well as outputs in awake mice. Glomerular and M/T cell responses were sparse and locally heterogeneous, with only a coarse dependence of glomerular positions on physical-chemical properties. Odor features represented by ensembles of M/T cells were overlapping, but distinct from those represented in glomeruli, consistent with extensive interplay between feedforward and feedback inputs to the bulb. This reformatting was well-described as a rotation in odor space. The descriptors accounted for a small fraction in response variance, and the similarity of odors in physical-chemical space was a poor predictor of similarity in neuronal representations. Our results suggest that commonly used physical-chemical properties are not systematically represented in bulbar activity and encourage further search for better descriptors of odor space.

scholarly journals Production, Characterization, and Evaluation of Pellets from Rice Harvest Residues

Energies ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 479 ◽  
Author(s):  
Cristina Moliner ◽  
Alberto Lagazzo ◽  
Barbara Bosio ◽  
Rodolfo Botter ◽  
Elisabetta Arato
Keyword(s):  
Moisture Content ◽  
Rice Straw ◽  
Rice Husk ◽  
Mechanical Performance ◽  
Chemical Properties ◽  
Quality Standards ◽  
Operational Conditions ◽  
Diametral Compression ◽  
Physical Chemical ◽  
Physico Chemical

Pellets from residues from rice harvest (i.e., straw and husk) were produced and their main properties were evaluated. Firstly, rice straw pellets were produced at lab scale at varying operational conditions (i.e., load compression and wt % of feeding moisture content) to evaluate their suitability for palletization. Successively, rice straw and husk pellets were commercially produced. All the samples were characterized in terms of their main physical, chemical, and physico-chemical properties. In addition, axial/diametral compression and durability tests were performed to assess their mechanical performance. All the analyzed properties were compared with the established quality standards for non-woody pellets. In general, rice straw pellets presented suitable properties for their use as pelletized fuels. Rice husk pellets fell out of the standards in recommended size or durability and thus preliminary treatments might be required prior their use as fuels.

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