Author
Chandrasekhar Garlapati
Other affiliations: Indian Institute of Science
Bio: Chandrasekhar Garlapati is an academic researcher from Pondicherry Engineering College. The author has contributed to research in topics: Supercritical carbon dioxide & Solubility. The author has an hindex of 12, co-authored 24 publications receiving 451 citations. Previous affiliations of Chandrasekhar Garlapati include Indian Institute of Science.
Papers
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TL;DR: In this article, a new set of empirical equations is proposed to correlate the solubilities of solids in supercritical carbon dioxide (both in the presence and absence of cosolvents) as a function of temperature, density of super critical carbon dioxide and the mole fraction of cosoline.
115 citations
TL;DR: In this article, the applicability of isotherm models to a group of adsorbent-adsorbate systems was studied and the correlating ability of the various models was compared in terms of arithmetic average relative deviation calculated based on qe.
83 citations
TL;DR: In this paper, the solubilities of two fatty acids, namely hexadecanoic acid (palmitic acid) and octadecanic acid(stearic acid), in supercritical carbon dioxide (SCCO2), were determined at T = (328 and 338) K from 12.8 MPa to 22.6 MPa.
70 citations
TL;DR: In this paper, a dimensionally consistent modified solvate complex model is derived to correlate solubilities of solids in supercritical fluids both in the presence and absence of entrainers (cosolvents).
68 citations
TL;DR: In this paper, the solubilities of hexadecanoic acid (palmitic acid) and octadecanic acid with and without cosolvents were determined at (308 and 318) K at pressures varying from (12.8 to 22.6) MPa.
Abstract: The solubilities of hexadecanoic acid (palmitic acid) and octadecanoic acid (stearic acid) in supercritical carbon dioxide without cosolvents and with two cosolvents, namely, ethanol and 3-methyl-1-butanol, were determined at (308 and 318) K at pressures varying from (12.8 to 22.6) MPa. The solubility data, in both the absence and presence of cosolvents, were correlated by a model proposed by Mendez-Santiago and Teja.
45 citations
Cited by
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TL;DR: The most comprehensive picture over SFE of vegetable matrices is provided in this review, highlighting pertinent aspects and opportunities that may further consolidate the convincing route of this technology for the next years.
Abstract: Along more than a decade, R&D on supercritical fluid extraction (SFE) of vegetable matrices has been increasingly reported in the literature. Aiming at portraying the current state of this field and its evolution in terms of raw materials, products, modes of operation, optimization, modeling techniques, and closeness to industrial application, a large compilation of almost 600 essays from 2000 to 2013 has been deeply analyzed in order to unveil those indicators and their trends. Furthermore, strengths and weaknesses are identified, and some remarks that may drive upcoming research are provided. Globally, more than 300 species are reported in the literature, with prevalence of the extraction of seeds (28% of works) and leaves (17%). The main families of extracted compounds, cosolvents and operating conditions adopted are critically examined, being possible to conclude that researchers investigate many times working regions far from the optimum due to practical limitations or absence of experimental optimization. Current phenomenological, statistical and semi-empirical approaches are reviewed, along with scale-up studies, and economic analysis. In the whole, the most comprehensive picture over SFE of vegetable matrices is provided in this review, highlighting pertinent aspects and opportunities that may further consolidate the convincing route of this technology for the next years.
395 citations
TL;DR: In this article, a review of high-pressure phase equilibria is presented, for which experimental high pressure phase-equilibrium data were published in the period between 2005 and 2008, continuing a series of reviews.
277 citations
TL;DR: A review of solubility data for solid compounds in sub- and supercritical fluids published in the literature between 2005 and 2010 is given in tabular form along with the temperature and pressure ranges and the correlation methods applied by the authors for modeling the experimentally determined data as discussed by the authors.
Abstract: A review of solubility data for solid compounds in sub- and supercritical fluids published in the literature between 2005 and 2010 is given in tabular form along with the temperature and pressure ranges and the correlation methods applied by the authors for modeling the experimentally determined data. Compounds are classified into groups on the basis of their chemical nature (inorganic, organometallic, aromatic, nonaromatic organic, polymer), except for biological and pharmaceutical compounds, which are considered as a separate group based on their functionality. For each group of compounds, new findings are reviewed and discussed. Supercritical CO2 was the preferred solvent for most of the applications, although an increasing interest in other solvents at elevated pressure has been observed, especially for fluorinated hydrocarbons, water, and propane.
216 citations
TL;DR: The present work explains the biosorption of malachite green dye from aquatic systems by nano zero valent iron stacked activated carbon (NZVI-AC), which was prepared by dual surface modification strategy by using FTIR, SEM-EDX, XRD and TGA.
145 citations
TL;DR: In this article, a new set of empirical equations is proposed to correlate the solubilities of solids in supercritical carbon dioxide (both in the presence and absence of cosolvents) as a function of temperature, density of super critical carbon dioxide and the mole fraction of cosoline.
115 citations