THE INFRARED SPECTRA OF HUMIC ACIDS AND RELATED MATERIALS

1957 ◽  
Vol 35 (8) ◽  
pp. 926-931 ◽  
Author(s):  
R. M. Elofson
Keyword(s):  
Carboxylic Acid ◽  
Humic Acids ◽  
Infrared Spectra ◽  
Bituminous Coal ◽  
Wave Length ◽  
Potassium Bromide ◽  
Low Rank ◽  
Acidic Properties ◽  
Long Wave ◽  
Degree Of Condensation

The infrared spectra of a number of humic acids and related materials obtained by the potassium bromide pressed pellet technique are summarized. Acidic properties of humic acids are largely due to clearly defined carboxylic acid frequencies at 3.9 μ and 5.8 to 5.85 μ. These bands are shifted in the expected manner by preparation of the sodium salts. Autoclaving of humic acids from lignite and from hydroquinone removes the carboxylic acid bands and produces material having bands in the long wave-length region that are at the same position as bands shown by bituminous coal and autoclaved cellulose. The potassium bromide technique has also revealed in the infrared spectra of low rank material a band at 6.65 μ which decreases markedly with increase in rank and may be related to the degree of condensation of aromatic nuclei.

ChemInform Abstract: Heterocyclic Substituted Arenediazonium Salts with a Long-Wave-Length Range of Sensitivity. Part 1. Monomethines and Azamethines.

ChemInform ◽  
1989 ◽  
Vol 20 (8) ◽  
Author(s):  
E. FANGHAENEL ◽  
K.-H. KUEHNEMUND ◽  
A. M. RICHTER
Keyword(s):  
Wave Length ◽  
Long Wave ◽  
Length Range ◽  
Arenediazonium Salts

A VACUUM SPECTROGRAPH FOR PRECISE MEASUREMENTS OF X‐RAYS OF LONG WAVE LENGTH

1930 ◽  
Vol 1 (12) ◽  
pp. 749-757
Author(s):  
Carl E. Howe
Keyword(s):  
Wave Length ◽  
X Rays ◽  
Long Wave

Wave Forces on a Stationary Platform of Elliptical Shape

1973 ◽  
Vol 17 (02) ◽  
pp. 61-71
Author(s):  
H. S. Chen ◽  
C. C. Mei
Keyword(s):  
Diffraction Problem ◽  
Wave Length ◽  
Practical Interest ◽  
Vertical Cylinder ◽  
Present Theory ◽  
Wave Forces ◽  
Mathieu Functions ◽  
Body Type ◽  
Elliptical Cross ◽  
Long Wave

Exciting forces and moments due to plane incident waves on a stationary platform are studied in this paper. The platform is a vertical cylinder with a finite draft and elliptical cross section. The mathematical solution to the diffraction problem is obtained on the basis of the linearized long wave approximation. Numerical results via Mathieu functions are presented for a shiplike body with beam-to-length ratio Various draft-to-depth ratios and angles of incidence are considered. Results have been checked with the limiting case of a circular cylinder for the long-wave length range. Aside from its own practical interest, the present theory provides a basis for comparison with other approximate theories of slender-body type and serves as a prelude to the corresponding calculations for arbitrary wavelengths.

Combustion characteristics of semicokes derived from pyrolysis of low rank bituminous coal

2012 ◽  
Vol 22 (5) ◽  
pp. 645-650 ◽  
Author(s):  
Wei Qian ◽  
Qiang Xie ◽  
Yuyi Huang ◽  
Jiatao Dang ◽  
Kaidi Sun ◽  
...  
Keyword(s):  
Bituminous Coal ◽  
Combustion Characteristics ◽  
Low Rank

THE NATURE OF THE SPECIES RESPONSIBLE FOR THE LONG WAVE LENGTH ABSORPTION BAND IN ACIDIC SOLUTIONS OF OLEFINS

1960 ◽  
Vol 64 (3) ◽  
pp. 382-383 ◽  
Author(s):  
Harry P. Leptin ◽  
W. Keith Hall
Keyword(s):  
Absorption Band ◽  
Wave Length ◽  
Acidic Solutions ◽  
Long Wave

Some studies in inorganic complexes. XXV. Cobalt(II) and nickel(II) complexes of 2-Acetamidopyridine and 2-Aminomethyl-6-rnethylpyridine, and the cobalt(II) complex of 2-Methylpyridine-6-carboxylic acid

1969 ◽  
Vol 22 (9) ◽  
pp. 1841 ◽  
Author(s):  
KH Shaw ◽  
GJ Sutton
Keyword(s):  
Magnetic Properties ◽  
Carboxylic Acid ◽  
Absorption Spectra ◽  
Infrared Spectra ◽  
Reflectance Spectra ◽  
Inorganic Complexes

Complexes of cobalt(II) and nickel(II) with the ligands 2- acetamidopyridine (acpy) and 2-aminomethyl-6-methylpyridine (mepic) have been prepared and studied. They included [Co(acpy)2X2], [Co(mepic)2X2], [Ni(acpy)2X2], and [Ni-(mepic)2X2], in which X is Cl, Br, I, or NCS; [Co(acpy)2(NO3)2], [Co(mepic)2(NO3)2], [Ni(acpy)2(NO3)2], [Ni(mepic)3NO3]NO3, [Co(acpy)3](ClO4)2, [Co(mepic)3](ClO4)2, [Co(mepic)3](CoCl4), [Ni(acpy)2(H2O)2](ClO4)2, and [Ni(mepic)2(H2O)2](ClO4)2. The inner complex of 2-methylpyridine-6- carboxylic acid [Co(mepiac)2,2H2O)] was also isolated. In all cases, the magnetic properties, conductances, reflectance spectra, absorption spectra, and infrared spectra are in agreement with the concept that they are spin-free, six-coordinate octahedral complexes. The substance [Ni(mepic)2NO3]NO3 contains both bidentate and ionic nitrate.

Numerically Study on Combustion and NOx Emission Characteristics in Tangentially Fired Boiler Co-Firing Semi-Coke

2018 ◽  
Author(s):  
Yongbo Du ◽  
Chang'an Wang ◽  
Pengqian Wang ◽  
Qiang Lv ◽  
Defu Che
Keyword(s):  
Bituminous Coal ◽  
Combustion Efficiency ◽  
Low Rank ◽  
Operation Performance ◽  
Combustion Heat ◽  
Practical Utilization ◽  
Excess Air ◽  
Utility Boilers ◽  
Excess Air Coefficient ◽  
Char Burnout

Semi-coke is a specific solid fuel, which is mainly produced by upgrading low-rank coal. The poor reactivity of semi-coke makes a difficulty to its practical utilization in utility boilers. Previous research was mainly focused on the combustion behavior of semi-coke, while the industrial application has to be understood. In this paper, the effect of co-firing semi-coke and bituminous coal on the operation performance of pulverized boiler was numerically studied. The work was conducted on a 300 MW tangentially fired boiler, and the temperature distribution, the char burnout and NOx production were mainly examined. The results indicate that the incomplete combustion heat loss drops with the increase in semi-coke blending ratio. The NOx concentration increases from 186 mg/Nm3 for only firing the bituminous coal to 200, 214, and 255 mg/Nm3, when the blending ratio was 17%, 33% and 50%, respectively. With enhancing excess air coefficient for the co-firing condition, the combustion efficiency got improved, while NOx production increased very slightly. In general, the boiler is well adapted to co-firing semi-coke, and the semi-coke blending ratio of 1/3 with an excess air coefficient of 1.235 is recommended.

scholarly journals Radiation torque on a spherical birefringent particle in the long wave length limit: analytical calculation

2005 ◽  
Vol 13 (14) ◽  
pp. 5192 ◽  
Author(s):  
Nian Ji ◽  
Mengkun Liu ◽  
Jihao Zhou ◽  
Zhifang Lin ◽  
S. T. Chui
Keyword(s):  
Wave Length ◽  
Analytical Calculation ◽  
Long Wave

scholarly journals On Rate of Reflection of Sound Wave of Long Wave-length

1950 ◽  
Vol 3 (15) ◽  
pp. 51-54
Author(s):  
Fumiki KITO
Keyword(s):  
Sound Wave ◽  
Wave Length ◽  
Long Wave
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