scholarly journals Infrared Spectroscopy Studies of Ricinodendron heudelotii Wood for its Pulp and Paper Production Potential

Author(s):  
Bolade M. Ogunleye ◽  
James S. Fabiyi ◽  
Joseph A. Fuwape ◽  
Armando G. McDonald
2009 ◽  
Vol 29 (1) ◽  
pp. 293-308 ◽  
Author(s):  
M.C. Monte ◽  
E. Fuente ◽  
A. Blanco ◽  
C. Negro

2017 ◽  
Vol 46 (35) ◽  
pp. 11626-11635 ◽  
Author(s):  
D. M. Bykov ◽  
R. J. M. Konings ◽  
C. Apostolidis ◽  
A. Hen ◽  
E. Colineau ◽  
...  

We synthesized a new NZP-type neptunium zirconium phosphate Np0.29Zr2(PO4)3 and investigated it by Rietveld analysis, infrared spectroscopy and Mössbauer spectroscopy.


2020 ◽  
Vol 8 (02) ◽  
pp. 293-299
Author(s):  
Otoide J. E.* ◽  
Ihinmikaiye, S. O. ◽  
Otoide, T. F.

The possibility of creating wealth in pulp and paper industry from the underutilized dry matters of the leaf sheaths of the pseudostem (Musa paradisiaca and M. sapientum), leaf stalk (Carica papaya) and stems (Panicum maximum and Andropogon tectorum) have been established from the anatomical parameters and indexes (fibre lengths and diameters, lumen width, cell wall thickness, Runkels ratio, flexibility coefficient (%) and slenderness ratio) of the fibres using standard procedures. Results obtained revealed that the Runkels ratio of the fibres in the five dry matters were 0.60, 0.44, 0.40, 0.87 and 0.93 for Musa sapientum, M. paradisiaca, Carica papaya, Panicum maximum and Andropogon tectorum respectively. These values, each been less than 1 (˂ 1) recommends each of the dry matters as suitable alternative source of raw materials for pulp and paper production industry. It was recommended that these dry plant materials be henceforth harnessed as alternative sources of raw materials for pulp and paper production industry as another means of wealth creation instead of allowing them to waste and cause environmental nuisance.


2019 ◽  
pp. 307-314
Author(s):  
Iuriy Davydovich Alashkevich ◽  
Mikhail Semenovich Lur’e ◽  
Ol'ga Mikhaylovna Lur’e ◽  
Aleksandr Sergeyevich Frolov

The question of the features of operation of submersible vortex flowmeters of water and water suspensions of low concentrations in pulp and paper production, which are installed in process pipelines with local hydraulic resistance, is considered. It is shown that with an insufficient straight section after local resistance, an additional error appears, which appears due to the influence of local resistance (transition or retraction) on the symmetry of the velocity diagram in front of the device. This error arises due to a change in the Strouhal number (Sh) and is related to the measurement method. The Strouhal number begins to depend on both the distance to the local resistance and the fluid flow rate. Identify this relationship and is dedicated to this work. Recommendations on the length of straight pipeline sections in front of the flow meter have been developed, which can be significantly reduced by limiting the range of operating flow rates. The studies were carried out by the method of numerical simulation of hydrodynamic processes with subsequent processing of the results by the method of experiment planning. The dependence of the number Sh on the length of the relative diameter of the pipeline L/ for hydrodynamic resistance in the form of a transition is presented. This error shows that the measurement error is within 2% already with a straight section in front of the flowmeter equal to 5–7 diameters. The response surface for pipe bends (rotations) is considered at 90º from which it follows that while maintaining the length of the straight section within 5–7 pipe diameters, it is necessary to narrow the measurement range of the instruments 2.5 times.


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