scholarly journals A note on the measurement of the specific heats of gases

1930 ◽  
Vol 126 (803) ◽  
pp. 675-682
Keyword(s):  
Continuous Flow ◽  
Thermal Gradient ◽  
Unit Volume ◽  
Present Note ◽  
Constant Pressure ◽  
Gas Flows ◽  
Specific Heats ◽  
Approximate Form ◽  
Continuous Flow Method ◽  
Made In

1. In a recent paper P. M. S. Blackett, P. S. H. Henry and E. K. Rideal have described a new continuous flow method of comparing the specific heats of gases. The method, which appears to have important advantages over existing methods, is based on the simple principle that the flow of a gas through a tube modifies any thermal gradient which may by any means be maintained along the tube. The temperature is raised or lowered according as the gas flows in or opposite to the direction of decreasing temperature. The alteration of the temperature is determined by the thermal conductivity KA of the tubewalls, the rate of flow of gas ( q ) along the tube, and the specific heat σ of the gas (at constant pressure) per unit volume ; hence it may be used to determine the latter. The application of this principle as made in the new method (here referred to as the BHR method) is discussed in detail in a separate paper by P. M. S. Blackett and P. S. H. Henry. The object of the present note is to suggest a rather different application of the principle, which in some ways (though not for all purposes) seems more convenient and accurate than the BHR method. The theory of the suggested application will first be worked out in an approximate form, leaving certain detailed corrections to be discussed later (§ 13).

A stopped-flow/continuous-flow method for kinetic determinations

1995 ◽  
Vol 309 (1-3) ◽  
pp. 277-282 ◽  
Author(s):  
Yun-Sheng Hsieh ◽  
S.R. Crouch
Keyword(s):  
Continuous Flow ◽  
Stopped Flow ◽  
Flow Method ◽  
Continuous Flow Method

scholarly journals Removal of Hydrogen Sulfide (H2S) Using MOFs: A Review of the Latest Developments

2020 ◽  
Vol 2 (1) ◽  
pp. 27
Author(s):  
Amvrosios G. Georgiadis ◽  
Nikolaos D. Charisiou ◽  
Ioannis V. Yentekakis ◽  
Maria A. Goula
Keyword(s):  
Hydrogen Sulfide ◽  
Oil And Gas ◽  
Great Promise ◽  
New Developments ◽  
Specific Heats ◽  
Gas Streams ◽  
Long Time ◽  
Metal Organic ◽  
Bed Stability ◽  
Made In

The removal of hydrogen sulfide (H2S) from gas streams with varying overall pressure and H2S concentrations is a long-standing challenge faced by the oil and gas industries. The present work focuses on H2S capture using metal–organic frameworks (MOFs), in an effort to shed light on their potential as adsorbents in the field of gas storage and separation. MOFs hold great promise as they make possible the design of structures from organic and inorganic units, but also, they have provided an answer to a long-time challenging issue, i.e., how to design extended structures of materials. Moreover, the functionalization of the MOF’s surface can result in increased H2S uptake. For example, the insertion of 1% of a fluorinated linker in MIL-101(Cr)-4F(1%) allows for enhanced H2S capture. Although noticeable efforts have been made in studying the adsorption capacity of H2S using MOFs, there is a clear need for gaining a deeper understanding in terms of their thermal conductivities and specific heats in order to design more stable adsorption beds, experiencing high exothermicity. Simply put, the exothermic nature of adsorption means that sharp rises in temperature can negatively affect the bed stability in the absence of sufficient heat transfer. The work presented herein provides a detailed discussion by thoroughly combining the existing literature on new developments in MOFs for H2S removal, and tries to provide insight into new areas for further research.

Design and Performance of a Miniaturized High-Speed Continuous-Flow Analyzer

1974 ◽  
Vol 20 (4) ◽  
pp. 424-427 ◽  
Author(s):  
William E Neeley ◽  
Stephen C Wardlaw ◽  
Helen C Sing
Keyword(s):  
Sample Size ◽  
Continuous Flow ◽  
High Speed ◽  
Clinical Laboratory ◽  
Small Animal ◽  
Sample Volume ◽  
Small Sample ◽  
Reagent Consumption ◽  
And Performance ◽  
Made In

Abstract Design features and performance of a miniaturized high-speed continuous-flow analyzer are described. Special emphasis is made in the design towards a system that is free from the operational and mechanical complexities found in most of today’s advanced systems. Depending on the particular analyses, sample size varies from 3 to 25 µl and reagent consumption is less than 180 µl per sample. Analyses are performed under steady-state conditions at sampling rates of 150 samples per hour with a 2:1 or 3:1 sample-to-wash ratio. The marked reduction in sample size makes the system ideal for microanalyses, especially in the pediatric clinical laboratory, in small animal research, and in any other cases where small sample volume is especially important.

ZnO-Based Catalyst for Photodegradation of 2-Chlorophenol in Aqueous Solution Under Simulated Solar Light Using a Continuous Flow Method

JOM ◽  
2020 ◽  
Vol 73 (1) ◽  
pp. 404-410
Author(s):  
Ahed H. Zyoud ◽  
Hala Salah ◽  
Shaher H. Zyoud ◽  
Samer H. Zyoud ◽  
Muath H. Helal ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Continuous Flow ◽  
Solar Light ◽  
Flow Method ◽  
Simulated Solar Light ◽  
Continuous Flow Method

scholarly journals Biosorption of Cu(II) Metal ions in Fixed Column by using Coconut Husk Waste

2018 ◽  
Vol 34 (4) ◽  
pp. 2192-2196 ◽  
Author(s):  
Harmiwati N.H ◽  
Khairul Akli ◽  
Rita Youfa ◽  
Maria Isfus Senjawati ◽  
Miftahul Khairati
Keyword(s):  
Heavy Metals ◽  
Continuous Flow ◽  
New Technology ◽  
Liquid Waste ◽  
Optimum Flow Rate ◽  
Coconut Husk ◽  
Bed Height ◽  
Optimum Flow ◽  
Heavy Metal Waste ◽  
Continuous Flow Method

A new technology has been currently developed for the removal of heavy metal waste in water, called biosorption. Biosorption technology has been widely used to remove heavy metals from liquid waste. The potential biomass which can be used as bio sorbent was activated coconut husk waste. By using the continuous flow method and activated coconut husk as bio sorbent, the obtained optimum flow rate and bed height of bio sorbent were 2 mL/min and 0.1 g with adsorption capacity of 188.322 mg/g.

Improved continuous-flow (SMAC) determination of serum albumin.

1978 ◽  
Vol 24 (7) ◽  
pp. 1191-1193 ◽  
Author(s):  
G Cederblad ◽  
B E Hickey ◽  
A Hollender ◽  
G Akerlund
Keyword(s):  
Reaction Time ◽  
Serum Albumin ◽  
Acute Phase ◽  
Continuous Flow ◽  
Green Method ◽  
Acute Phase Reactants ◽  
Modified Method ◽  
Continuous Flow Method ◽  
Bromcresol Green

Abstract The albumin values determined by the bromcresol green methods do not compare well with values by more specific methods for albumin determination. The discrepancies have been related to, among other things, acute-phase reactants and are especially pronounced in the lower albumin range. These disadvantages are also inherent in a routine continuous-flow method for albumin (SMAC). The bromcresol green method has been improved considerably by shortening the reaction time before the absorbance is measured, as is described here. The modified method yields values that better agree with those by more specific methods and an influence of acute-phase reactants is no longer observed.

Sign in / Sign up

Export Citation Format

Share Document