https://www.pnas.org/content/pnas/90/5/1635.full.pdf

Supramolecular chemistry.

The use of sodium bicarbonate (NaHCO3) as a solid reactant for the removal of acid pollutants in industrial flue gas streams is a simple and effective process solution. Nonetheless, despite its tec...

Experimental Investigation of the Reactivity of Sodium Bicarbonate toward Hydrogen Chloride and Sulfur Dioxide at Low Temperatures

The aqueous solutions of various amines are used as chemical absorbents in gas treating processes. It is considered that aqueous ammonia can be used as a promising solvent for CO2 capture. Apart from the many advantages of ammonia as a CO2 capture solvent, its major drawback is high volatility. As a consequence, a large amount of ammonia can be released into the atmosphere. In this paper we investigated the effects of process parameters on ammonia emissions from the absorber used for CO2 capture. Ammonia solution withdrawn from the ammonia recovery tower of the Solvay Process was used as solvent. During the research, the absorber pressure, liquid to gas flow ratio (L/G) and concentration of ammonia have been varied. In addition, a novel simple method for quantitative analysis of absorbed CO2 in the ammonia solvent was described. We found that increasing the L/G ratio and ammonia concentration in the solvent resulted in a growth of ammonia emissions. The amount of released ammonia from the absorber was in the range 14-46 mg/dm3. However, it is important to note that no emission reduction devices were applied. The test of CO2 capture using aqueous ammonia was satisfactory, with more than 90% of the inlet CO2 stream being removed.

http://www.pjoes.com/pdf-92210-37077?filename=Laboratory Studies of.pdf

Laboratory Studies of Ammonia Emissionsfrom the CO2 Capture Process Using AqueousAmmonia from the Solvay Process

Regeneration of sodium bicarbonate from industrial Na-based desulfurization waste using ammonium hydroxide

Effective identification of (NH4)2CO3 and NH4HCO3 concentrations in NaHCO3 regeneration process from desulfurized waste.

The structural characterization of tetranuclear cage-type cadmium(II) carboxylate [Cd4(2-cpida)2(2,2′-bpy)6]·(2,2-bpy)·(ClO4)·3H2O (1) (2-H3cpida = N-(2-carboxyphenyl)iminodiacetic acid, 2,2′-bpy = 2,2′-bipyridine) is described. H-bonding interactions between three lattice water molecules form a V-shaped trimer (H2O)3, which is stabilized by 1. In addition, luminescence investigations revealed that 1 shows enhanced emissions as compared with free 2-H3cpida in the liquid state.

Palanisami Nallasamy

Papers

Effective identification of (NH4)2CO3 and NH4HCO3 concentrations in NaHCO3 regeneration process from desulfurized waste.

Structural and luminescent properties of a tetranuclear cage-type cadmium(II) carboxylate cluster containing a V-shaped water trimer