Heats of Combustion and Specific Heats of Buna-S Treated in Various Ways

1942 ◽  
Vol 15 (4) ◽  
pp. 874-878 ◽  
Author(s):  
W. A. Roth ◽  
Gerhilde Wirths ◽  
Hildegarde Berendt
Keyword(s):  
Specific Heats ◽  
Thermal Data ◽  
Heats Of Combustion

Abstract Measurements of the heats of combustion and specific heats (between 20° and 50° C) of crude untreated Buna-S, highly degraded Buna-S, and cyclized Buna-S are reported. The heats of combustion are then discussed. A well defined relation exists between thermal data and changes which take place in Buna-S. In the case of specific heats, the values of which are less precise, the relation is not so clearly defined.

scholarly journals Boilers slagging when burning wood pellets

2022 ◽  
Vol 1211 (1) ◽  
pp. 012006
Author(s):  
V K Lyubov ◽  
A V Malkov ◽  
P D Alekseev
Keyword(s):  
Environmental Performance ◽  
Hot Water ◽  
Transportation Costs ◽  
Wood Pellets ◽  
Promising Trend ◽  
Specific Heats ◽  
Nominal Capacity ◽  
Heats Of Combustion ◽  
Main Factors ◽  
Negative Phenomena

Abstract A promising trend for upgrading wastes from timber cutting, processing and treatment is their granulation. It allows to increase their specific heats of combustion by 2.5– 3.5 times and their portability characteristics by 3–4 times, to reduce transportation costs by 6– 10 times and to improve all the operations stages. The construction and commissioning of boiler facilities operating on refined biofuel made it possible to form a stable domestic market for wood pellets. However, 0.5 – 1.5 MW nominal capacity hot water boilers equipped with furnaces and profiled burners at the bottom, in cold seasons had fast accumulation of focal residues deposits in the burners and on the furnace chambers lining. The process was complicated by these deposits hardening due to their melting and sintering. These circumstances cause a decrease in the energy and environmental performance of heat-generating installations and their reliability, and also leads to the unplanned shutdowns to clean the boiler furnaces. To find out the reasons for these negative phenomena and to develop recommendations for their elimination, a set of research operations was carried out with wood pellets shipped by the manufacturer and supplied to the burners of the boilers under the analyses; with focal residues accumulated in the burners and on the lining of the furnace chambers; as well as an analysis of the heat generating facilities operation modes. The studies carried out made it possible to identify the main factors that caused these negative phenomena and to develop the recommendations for their elimination.

α- and β-Monopalmitin, Heats of Combustion and Specific Heats at 25°1

1940 ◽  
Vol 62 (7) ◽  
pp. 1815-1817 ◽  
Author(s):  
Theodore H. Clarke ◽  
Gebhard Stegeman
Keyword(s):  
Specific Heats ◽  
Heats Of Combustion

Thermal Data. VII. The Heats of Combustion of Seven Amino Acids

1937 ◽  
Vol 59 (11) ◽  
pp. 2144-2150 ◽  
Author(s):  
Hugh M. Huffman ◽  
Sidney W. Fox ◽  
Emory L. Ellis
Keyword(s):  
Amino Acids ◽  
Thermal Data ◽  
Heats Of Combustion

scholarly journals The strengths of certain covalent metal bonds

1949 ◽  
Vol 241 (838) ◽  
pp. 587-617 ◽  
Keyword(s):  
Kinetic Studies ◽  
Heats Of Formation ◽  
Bond Energies ◽  
Melting Points ◽  
Bomb Calorimeter ◽  
Diethyl Zinc ◽  
Dissociation Energies ◽  
Thermal Data ◽  
Heats Of Combustion ◽  
Metal Bonds

A method has been evolved for measuring the heats of combustion of spontaneously inflammable substances in the bomb calorimeter and applied to the following compounds: zinc dimethyl, zinc diethyl, zinc di- n -propyl, zinc di- n -butyl, cadmium dimethyl, boron trimethyl and aluminium trimethyl. The samples used were subjected to very thorough purification, revised melting points being given for cadmium dimethyl and aluminium trimethyl. The heats of formation, deduced by the application of additional thermal data, have been listed with all those so far determined for the metal alkyls, and the energies of dissociation and bond energies of the metal-carbon links estimated. This has entailed a recalculation of the heats of sublimation of aluminium and tin. From a comparison of the values obtained for the dissociation energies with evidence from spectroscopic and kinetic studies, a definite necessity for taking into account the energies required to promote the various elements to the states of maximum valency is apparent.

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