Topic
Sodium sulfide
About: Sodium sulfide is a research topic. Over the lifetime, 2851 publications have been published within this topic receiving 27733 citations. The topic is also known as: disodium sulfide.
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TL;DR: In this paper, the β-lactosyl thioceramide was converted into the per-O-acetyl derivative by Azido group reduction and N-palmitoylation.
12 citations
TL;DR: In this paper, structural and electrical properties of the nanocrystalline cadmium sulfide (CdS) powder were effectively synthesized and annealed at 573 K, 673 K and 773 K.
Abstract: Structural and electrical properties of the nanocrystalline cadmium sulfide (CdS) powder were effectively synthesized and annealed at 573 K, 673 K and 773 K. Cadmium sulfate and sodium sulfide was used as a starting precursor for the preparation of CdS nanoparticles. The XRD results confirmed that major phase of hexagonal structure-CdS along with partial oxidation of CdO and CdSO3 nanoparticles. It reveals that the average crystallite size varies from 25 to 41 nm as annealing temperature increases. The phase and functional group composition was studied through FTIR. The average particle size distribution of CdS nanoparticles is 39, 47, and 49 nm for 573, 673, and 773 K, respectively. The surface morphology of CdS particles revealed the compact crystalline structure. Electrochemical impedance spectroscopy studies showed that the charge transfer resistance is lowered as annealing temperature is increased.
12 citations
TL;DR: In this article, the authors applied Response Surface Methodology (RSM) to design and optimize experiments based on Central Composite Design (CCD) to investigate the individual and interactive effects of three independent operating conditions on the weight percent of the produced Na2 S (Y ) were investigated by RSM: initial NaOH concentration (10-20% w/w), scrubbing solution temperature (40-60 °C) and liquid-to-gas volumetric ratio (15-10−3 to 25 ǫ 10−3 ).
Abstract: The existence of hydrogen sulfide (H2 S) in the gas effluents of oil, gas and petrochemical industries causes environmental pollution and equipment corrosion. These gas streams, called off-gas, have high H2 S concentration, which can be used to produce sodium sulfide (Na2 S) by H2 S reactive absorption. Na2 S has a wide variety of applications in chemical industries. In this study, the reactive absorption process was performed using a spray column. Response Surface Methodology (RSM) was applied to design and optimize experiments based on Central Composite Design (CCD). The individual and interactive effects of three independent operating conditions on the weight percent of the produced Na2 S (Y ) were investigated by RSM: initial NaOH concentration (10-20% w/w), scrubbing solution temperature (40-60 °C) and liquid-to-gas volumetric ratio (15 × 10−3 to 25 × 10−3 ). Furthermore, an Artificial Neural Network (ANN) model was used to predict Y . The results from RSM and ANN models were compared with experimental data by the regression analysis method. The optimum operating conditions specified by RSM resulted in Y of 15.5% at initial NaOH concentration of 19.3% w/w, scrubbing solution temperature of 40 °C and liquid-to-gas volumetric ratio of 24.6 × 10−3 v/v.
12 citations
TL;DR: A manual colorimetric method for determination of sulfide has been adapted to flow injection, systematically optimized, and more fully characterized and its intended application is for measurement of sodium sulfide reagent strength in pulp process streams, and sulfide contamination in effluent from Kraft pulp mills.
12 citations
TL;DR: In this paper, the authors studied the performance of basic chromium-sulfate (BCS) conversion at a chemical process industry (B&M Chemicals, India) where the BCS is produced at suboptimal efficiency due to inefficient absorption of sulfur-di-oxide (as the gas enters the tower at a higher temperature) followed by reaction.
12 citations