Corrosion in CO2 Absorption Process Using Aqueous Monoethanolamine/piperazine Solution PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Corrosion in CO2 Absorption Process Using Aqueous Monoethanolamine/piperazine Solution PDF full book. Access full book title Corrosion in CO2 Absorption Process Using Aqueous Monoethanolamine/piperazine Solution by Manjula Nainar. Download full books in PDF and EPUB format.
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: 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: Helei Liu Publisher: Springer ISBN: 303000922X Category : Technology & Engineering Languages : en Pages : 55
Book Description
This book presents a comprehensive review of the latest information on all aspects of the post-combustion carbon capture process. It provides designers and operators of amine solvent-based CO2 capture plants with an in-depth understanding of the most up-to-date fundamental chemistry and physics of the CO2 absorption technologies using amine-based reactive solvents. Topics covered include the physical properties, chemical analysis, reaction kinetics, CO2 solubility, and innovative configurations of absorption and stripping columns as well as information on technology applications. This book also examines the post-build operational issues of corrosion prevention and control, solvent management, solvent stability, solvent recycling and reclaiming, intelligent monitoring and plant control including process automation. In addition, the authors discuss the recent insights into the theoretical basis of plant operation in terms of thermodynamics, transport phenomena, chemical reaction kinetics/engineering, interfacial phenomena, and materials. The insights provided help engineers, scientists, and decision makers working in academia, industry and government gain a better understanding of post-combustion carbon capture technologies.
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: Ching-Ting Liu Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
Current obstacles that prevent commercial implementation of amine-scrubbing CO2 capture are the high costs. Reducing capital costs by appropriate selection of construction materials, which requires knowledge of material corrosion performance for the process, will improve the economic feasibility of this technology. Corrosion was evaluated in three pilot plant campaigns using aqueous piperazine with the Advanced Stripper (PZAS). 316L stainless steel (SS) experienced higher corrosion than 304 SS and 2205 duplex SS, and the corrosion rate showed strong dependence on the temperature. 304 and 2205 performed well at all locations and should be good construction materials for PZAS. Degraded PZ exacerbated 316L corrosion, and removal of PZ degradation products using a carbon adsorption bed significantly reduced corrosion. Carbon steel (CS) corrosion showed a weak temperature effect because the corrosion was more dependent on the protective siderite film. The protectiveness of the films was related to fluid velocity. Ni-based alloys corroded in PZ, and the rate increased with temperature. Corrosion of C1010 CS and SS (304, 316L, 430) was measured at absorber and water wash conditions on the bench-scale. Corrosion rate decreases with increasing PZ. With more than 0.003 m PZ in solution, CS has acceptable corrosion performance. Corrosion of CS increases with increasing partial pressure of CO2, suggesting loading is another dominant parameter for carbon steel corrosion. Temperature has a less significant effect than PZ concentration and loading. CS corrosion increases with increasing flow velocity at both absorber and water wash conditions. SS had little corrosion at this lower temperature. Performance of siderite (FeCO3) protective films on CS was studied at representative stripper conditions on the bench-scale. Siderite films can deposit on the surface of CS in CO2-loaded PZ solution at temperatures >100 °C and protect CS from corrosion. The protection may fail in degraded PZ. Ethylenediamine (EDA) is one of the major contributors for the loss of film protectiveness or can be the surrogate for the effect of PZ degradation on siderite film protection. A link between protectiveness and the apparent density of siderite films was discovered. The apparent density of siderite films decreases with increasing flow velocity and decreasing CO2 loading, resulting in higher corrosion of CS
Author: Kent Billington Fischer Publisher: ISBN: Category : Languages : en Pages : 448
Book Description
Post-combustion carbon capture and storage with amine absorbents is a key technology needed to provide low-cost decarbonized electricity. Improving understanding of corrosion by amines may reveal a solvent system compatible with carbon steel, which would reduce plant capital costs. Corrosion of stainless and carbon steel in aqueous monoethanolamine (MEA) and piperazine (PZ) has been measured. High temperature amine corrosion was measured in a bench-scale pressure vessel and iron solubility in amines was screened in stirred reactors. Corrosion was measured at two PZ pilot plants and one MEA pilot plant, using coupons and electrical resistance probes. Corrosion products were characterized by SEM and powder X-ray diffraction. Carbon steel (C1010) often performs well in 5 molal PZ up to 150 °C due to the formation of a passivating FeCO3 layer. This layer is promoted at high temperature, high CO2 loading, low solution velocity, and in amines with low Fe2+ solubility. FeCO3 formation is favorable at high temperature because Fe2+ solubility decreases and the kinetics of FeCO3 formation are faster. This also means that FeCO3 is not observed at low temperature. Despite this, carbon steel performs well at low temperature due to slower kinetics of metal oxidation. Depassivation and high corrosion of stainless steel (316L) can occur in amine solutions at high temperature (150 °C) when conditions are relatively anoxic and reducing. Performance of stainless at high temperature in PZ suggests that it can be pushed into and out of the passive state by small process changes, such as different flue gas O2 concentrations. However, stainless performs well in both MEA and PZ in pilot plants at ≈120 °C. Fe3+ corrosion products are generated in the absorber, then reduced to Fe2+ in the high temperature, anoxic conditions of the stripper. In this way, carried-over Fe3+ is responsible for oxidation of amine and corrosion at high temperature. Certain highly corrosive amines also have high Fe2+ solubility. Ethylamines like MEA are likely the correct chain length to form stable complexes with Fe2+ in solution. Stable Fe2+-amine complexes cause high Fe2+ solubility, which prevents FeCO3 formation and leads to high corrosion
Author: Ibrahim Dincer Publisher: Elsevier ISBN: 0128149256 Category : Science Languages : en Pages : 5543
Book Description
Comprehensive Energy Systems, Seven Volume Set provides a unified source of information covering the entire spectrum of energy, one of the most significant issues humanity has to face. This comprehensive book describes traditional and novel energy systems, from single generation to multi-generation, also covering theory and applications. In addition, it also presents high-level coverage on energy policies, strategies, environmental impacts and sustainable development. No other published work covers such breadth of topics in similar depth. High-level sections include Energy Fundamentals, Energy Materials, Energy Production, Energy Conversion, and Energy Management. Offers the most comprehensive resource available on the topic of energy systems Presents an authoritative resource authored and edited by leading experts in the field Consolidates information currently scattered in publications from different research fields (engineering as well as physics, chemistry, environmental sciences and economics), thus ensuring a common standard and language
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The objective of this work is to improve the process for CO2 capture by alkanolamine absorption/stripping by developing an alternative solvent, aqueous K2CO3 promoted by piperazine. The best K/PZ solvent, 4.5 m K/4.5 m PZ, requires equivalent work of 31.8 kJ/mole CO2 when used with a double matrix stripper and an intercooled absorber. The oxidative degradation of piperazine or organic acids is reduced significantly by inhibitor A, but the production of ethylenediamine is unaffected. The oxidative degradation of piperazine in 7 m MEA/2 m PZ is catalyzed by Cu{sup ++}. The thermal degradation of MEA becomes significant at 120 C. The solubility of potassium sulfate in MEA/PZ solvents is increased at greater CO2 loading. The best solvent and process configuration, matrix with MDEA/PZ, offers 22% and 15% energy savings over the baseline and improved baseline, respectively, with stripping and compression to 10 MPa. The energy requirement for stripping and compression to 10 MPa is about 20% of the power output from a 500 MW power plant with 90% CO2 removal. The stripper rate model shows that a ''short and fat'' stripper requires 7 to 15% less equivalent work than a ''tall and skinny'' one. The stripper model was validated with data obtained from pilot plant experiments at the University of Texas with 5m K+/2.5m PZ and 6.4m K+/1.6m PZ under normal pressure and vacuum conditions using Flexipac AQ Style 20 structured packing. Experiments with oxidative degradation at low gas rates confirm the effects of Cu{sup +2} catalysis; in MEA/PZ solutions more formate and acetate is produced in the presence of Cu{sup +2}. At 150 C, the half life of 30% MEA with 0.4 moles CO2/mole amine is about 2 weeks. At 100 C, less than 3% degradation occurred in two weeks. The solubility of potassium sulfate in MEA solution increases significantly with CO2 loading and decreases with MEA concentration. The base case corrosion rate in 5 M MEA/1.2M PZ is 22 mpy. With 1 wt% heat stable salt, the corrosion rate increases by 50% to 160% in the order: thiosulfate
Author: Wojciech M. Budzianowski Publisher: Springer ISBN: 3319472623 Category : Technology & Engineering Languages : en Pages : 282
Book Description
This book reviews and characterises promising single-compound solvents, solvent blends and advanced solvent systems suitable for CO2 capture applications using gas-liquid absorption. Focusing on energy efficient solvents with minimal adverse environmental impact, the contributions included analyse the major technological advantages, as well as research and development challenges of promising solvents and solvent systems in various sustainable CO2 capture applications. It provides a valuable source of information for undergraduate and postgraduate students, as well as for chemical engineers and energy specialists.
Author: Manjula Nainar
Author: Manjula Nainar
Author: Helei Liu
Author: Immanuelraj Soosaiprakasam
Author: Ching-Ting Liu
Author: Kent Billington Fischer
Author: Prakashpathi Gunasekaran
Author: 
Author: Ibrahim Dincer
Author: 
Author: Wojciech M. Budzianowski