Screening and Evaluating Environmentally-Friendly Corrosion Inhibitors for Amine-Based CO2 Absorption Process PDF Download
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Author: Sureshkumar Srinivasan Publisher: ISBN: Category : Technology Languages : en Pages :
Book Description
This chapter evaluated the performance of environmentally friendly organic corrosion inhibitors on carbon steel in the amine-based carbon dioxide (CO2) absorption process. The evaluation was experimentally conducted using electrochemical techniques in 5.0 kmol/m3 monoethanolamine (MEA) solutions in the absence and presence of process contaminants, namely formate and chloride, at 80°C and 0.55 mol/mol CO2 loading. The results show, in the absence of process contaminants, that 2-aminobenzene sulfonic acid, 3-aminobenzene sulfonic acid, 4-aminobenzene sulfonic acid, sulfapyridine, and sulfolane yielded 85-92% corrosion inhibition efficiencies, while sulfanilamide yielded the lowest efficiency of 20-42%. Sulfolane was the only tested inhibitor whose performance could be maintained in chloride- and formate-containing MEA solutions. On the contrary, the performance of 3-aminobenzene sulfonic acid and sulfapyridine was decreased by chloride. The performance of all the tested aminobenzene sulfonic acids was compromised by formate.
Author: Sureshkumar Srinivasan Publisher: ISBN: Category : Technology Languages : en Pages :
Book Description
This chapter evaluated the performance of environmentally friendly organic corrosion inhibitors on carbon steel in the amine-based carbon dioxide (CO2) absorption process. The evaluation was experimentally conducted using electrochemical techniques in 5.0 kmol/m3 monoethanolamine (MEA) solutions in the absence and presence of process contaminants, namely formate and chloride, at 80°C and 0.55 mol/mol CO2 loading. The results show, in the absence of process contaminants, that 2-aminobenzene sulfonic acid, 3-aminobenzene sulfonic acid, 4-aminobenzene sulfonic acid, sulfapyridine, and sulfolane yielded 85-92% corrosion inhibition efficiencies, while sulfanilamide yielded the lowest efficiency of 20-42%. Sulfolane was the only tested inhibitor whose performance could be maintained in chloride- and formate-containing MEA solutions. On the contrary, the performance of 3-aminobenzene sulfonic acid and sulfapyridine was decreased by chloride. The performance of all the tested aminobenzene sulfonic acids was compromised by formate.
Author: Mahmood Aliofkhazraei Publisher: BoD – Books on Demand ISBN: 9535139177 Category : Technology & Engineering Languages : en Pages : 264
Book Description
To protect metals or alloys from corrosion, some methods can be used such as isolating the structure from the aggressive media or compensating the loss of electrons from the corroded structure. The use of corrosion inhibitors may include organic and inorganic compounds that adsorb on the metallic structure to isolate it from its surrounding media to decrease oxidation-reduction processes. This book collects new developments about corrosion inhibitors and their recent applications.
Author: Balaji Udayappan Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
Inorganic corrosion inhibitors including heavy metals have been widely used in the carbon dioxide (CO2) absorption process for corrosion control. However, they are not environmentally friendly causing costly handling and disposal costs. This work therefore evaluated corrosion inhibition performance of an organic amino acid compound, namely Methionine (MTI) which is less toxic, more readily biodegradable, and has lower potential for bioaccumulation in aquatic organisms compared to common amine absorption solvents. The evaluation was experimentally implemented using electrochemical and weight loss methods. Carbon steel (CS1018) and 5.0 kmol/m3 Monoethanolamine (MEA) purged with 85% CO2 and 15% oxygen (O2) were used as tested material and absorption solution, respectively. The electrochemical results showed that at solution temperatures up to 80oC, MTI effectively reduced corrosion rates of CS1018 with maximum inhibition efficiencies of 83.56% ± 1.82% under a static condition (0 rpm) and 74.96% ± 0.95% under a dynamic condition (1500 rpm). Its inhibition performance was found to increase with inhibitor concentration and solution temperature but decrease with rotational speed. MTI acted as a mixed-type inhibitor and exhibited pitting tendency. The optimal MTI concentrations were 1500 ppm at 0 rpm and 2000 ppm at 1500 rpm. The post data analysis involving adsorption isotherm and activation thermodynamic properties revealed that MTI protected metal surface by undergoing spontaneous and endothermic physical adsorption. Its adsorption characteristic matched well with the Langmuir adsorption isotherm, thereby suggesting that MTI formed a protective monolayer on the metal surface. The results of quantum chemical analysis suggested MTI has higher affinity, polarizability, and electron donating ability than MEA. III The results of weight loss experiments carried out for up to 28 days showed that at 120oC, 5 bar and 1500 rpm, MTI was able to reduce corrosion rates of CS1018 to below 1 mmpy. The inhibition efficiencies were up to 78.7% for carbon steel specimens fully immersed in the MEA solutions, 53.5% for those partially immersed in the MEA solution and partially exposed to vapor, and 85.6% for those fully exposed to vapor. Pits were observed on carbon steel specimens fully immersed in both uninhibited and MTI inhibited solutions.
Author: Chandrabhan Verma Publisher: John Wiley & Sons ISBN: 111979448X Category : Technology & Engineering Languages : en Pages : 530
Book Description
Provides comprehensive coverage of organic corrosion inhibitors used in modern industrial platforms, including current developments in the design of promising classes of organic corrosion inhibitors Corrosion is the cause of significant economic and safety-related problems that span across industries and applications, including production and processing operations, transportation and public utilities infrastructure, and oil and gas exploration. The use of organic corrosion inhibitors is a simple and cost-effective method for protecting processes, machinery, and materials while remaining environmentally acceptable. Organic Corrosion Inhibitors: Synthesis, Characterization, Mechanism, and Applications provides up-to-date coverage of all aspects of organic corrosion inhibitors, including their fundamental characteristics, synthesis, characterization, inhibition mechanism, and industrial applications. Divided into five sections, the text first covers the basics of corrosion and prevention, experimental and computational testing, and the differences between organic and inorganic corrosion inhibitors. The next section describes various heterocyclic and non-heterocyclic corrosion inhibitors, followed by discussion of the corrosion inhibition characteristics of carbohydrates, amino acids, and other organic green corrosion inhibitors. The final two sections examine the corrosion inhibition properties of carbon nanotubes and graphene oxide, and review the application of natural and synthetic polymers as corrosion inhibitors. Featuring contributions by leading researchers and scientists from academia and industry, this authoritative volume: Discusses the latest developments and issues in the area of corrosion inhibition, including manufacturing challenges and new industrial applications Explores the development and implementation of environmentally-friendly alternatives to traditional toxic corrosion inhibitors Covers both established and emerging classes of corrosion inhibitors as well as future research directions Describes the anticorrosive mechanisms and effects of acyclic, cyclic, natural, and synthetic corrosion inhibitors Offering an interdisciplinary approach to the subject, Organic Corrosion Inhibitors: Synthesis, Characterization, Mechanism, and Applications is essential reading for chemists, chemical engineers, researchers, industry professionals, and advanced students working in fields such as corrosion inhibitors, corrosion engineering, materials science, and applied chemistry.
Author: Immanuelraj Soosaiprakasam Publisher: ISBN: Category : Carbon dioxide mitigation Languages : en Pages : 292
Book Description
Corrosion is one of the most severe operational problems in CO2 absorption processes, which use aqueous solutions of alkanolamines, especially when carbon steel is used for plant construction. Corrosion inhibitors are widely applied used in this process to suppress severe corrosion to an acceptable level. However, currently available corrosion inhibitors are heavy metals, which are toxic to human health and the environment, making solvent handling and waste disposal more difficult and costly. This work evaluated a low-toxic corrosion inhibitor, copper carbonate (CuCO3), as a replacement for toxic corrosion inhibitors. An inhibition evaluation was performed on copper carbonate by examining its parametric effects on the corrosion rate and corrosion behavior of carbon steel.
Author: Manjula Nainar Publisher: ISBN: Category : Amines Languages : en Pages : 312
Book Description
This work explores the promise of aqueous solutions of blended monoethanolamine (MEA) and piperazine (PZ) as a cost-effective solvent for carbon dioxide (CO2) capture from industrial flue gas streams with respect to addressing corrosion, which is regarded as one of the most severe operational problems in typical CO2 capture plants. Two types of corrosion experiments were carried out in bench-scale setups, electrochemical tests for short-term exposure and weight loss tests for long-term exposure. The results show that the blended MEA/PZ solutions are more corrosive than the MEA solutions. The corrosion rate of carbon steel increases with concentration of PZ, total amine concentration, CO2 loading of solution, solution temperature, the presence of heat stable salts, and the presence of the proprietary oxidative degradation inhibitor (Inhibitor A provided by the University of Texas at Austin). Among the tested heat-stable salts, formate is the most corrosive salt, followed by acetate, oxalate, and thiosulfate in the absence of oxygen (O2), while acetate is the most corrosive salt followed by formate, oxalate, and thiosulfate in the presence of O2. Based on the level of corrosion rate found in the MEA/PZ system, corrosion control is required during plant operation to suppress the corrosion rate of carbon steel to below an acceptable level. Sodium metavanadate (NaVO3) and copper carbonate (CuCO3) were proven to be effective corrosion inhibitors with inhibition performance of up to 94-98%. Dissolved O2 is required in the solution to maintain active Cu2 or V5+, which, thus, prevents the metallic copper (Cu) from plating out or the formation of other oxidative states of vanadate. The performance of these two inhibitors can be deteriorated by the presence of heat-stable salts in the solutions.
Author: Foster Amoateng Appiah Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
This study focused on utilizing the combined effect between solvent development and the application of solid catalysis to enhance the reactive absorption-based CO2 capture process. First, the CO2 removal performance of three formulated amine bi-blends were evaluated using a semi-batch screening setup. The performance of each blend in terms of specific parameters such as linear absorption and desorption rates, CO2 equilibrium loading, cyclic capacity and solvent regeneration heat duty were compared with the activity of the standard 4M BEA/AMP blend. The bi-blends developed included 2M HMDA/PEI (1.85M: 0.15M), 2M AMP/PEI (1.7M: 0.3M) and 4M DMAE/AMP (2M: 2M). The screening results showed that by reason of higher reactivity resulting from increased number of amino groups in HMDA and PEI, better absorption performance was observed for 2M HMDA/PEI and 2M AMP/PEI bi-blends. However, from the absorption parameter and desorption parameter criterion, 4M DMAE/AMP was found to be the optimum bi-blend amongst the three blends. In addition, the effects of solid alkaline and acid catalysts on the CO2 absorption and desorption performance of the selected optimum blend were studied. Also, the different characteristics of the catalysts were investigated and related to the corresponding enhancement activity to identify and establish the activity-characteristics relationship. Employing the acid proprietary desorber catalyst (AD-1) increased the linear desorption rate and cyclic capacity of 4M DMAE/AMP by 21% and 8.1% respectively and reduced the solvent regeneration energy requirement by 17.3%. Between the absorber catalysts, an increase of 33.3% and 29% in absorption rates were measured for ACS and AB-1 respectively. Comparing the activity of ACS to AB-1, it was observed that the activity of catalyst depends on both the chemical properties (strength and number of basic sites) and physical properties (surface area and pore volume). Furthermore, a full cycle operation in a bench-scale CO2 capture unit was carried out to validate the performance of 4M DMAE/AMP and 2M HMDA/PEI bi-blends. The performance was evaluated as a function of time-on-stream. From the cyclic runs, higher CO2 absorption and desorption performance parameters were recorded for 4M DMAE/AMP relative to the 2M HMDA/PEI blend. The time-on-stream analysis revealed a general reduction in capture performance and an increase in heat duty for both bi-blends.
Author: Sureshkumar Srinivasan
Author: Sureshkumar Srinivasan
Author: Sureshkumar Srinivasan
Author: Mahmood Aliofkhazraei
Author: Balaji Udayappan
Author: Chandrabhan Verma
Author: Prakashpathi Gunasekaran
Author: Immanuelraj Soosaiprakasam
Author: Anthony Okay Machie
Author: Manjula Nainar
Author: Foster Amoateng Appiah