Supported Layered Double Hydroxides as CO2 Adsorbents for Sorption-enhanced H2 Production PDF Download

Author: Diana Iruretagoyena Ferrer
Publisher:
ISBN: 9783319412771
Category : Catalysis
Languages : en
Pages :

View

Book Description

Author: Diana Iruretagoyena Ferrer
Publisher: Springer
ISBN: 3319412760
Category : Technology & Engineering
Languages : en
Pages : 234

View

Book Description
This thesis presents a combination of material synthesis and characterization with process modeling. In it, the CO2 adsorption properties of hydrotalcites are enhanced through the production of novel supported hybrids (carbon nanotubes and graphene oxide) and the promotion with alkali metals. Hydrogen is regarded as a sustainable energy carrier, since the end users produce no carbon emissions. However, given that most of the hydrogen produced worldwide comes from fossil fuels, its potential as a carbon-free alternative depends on the ability to capture the carbon dioxide released during manufacture. Sorption-enhanced hydrogen production, in which CO2 is removed as it is formed, can make a major contribution to achieving this. The challenge is to find solid adsorbents with sufficient CO2 capacity that can work in the right temperature window over repeated adsorption-desorption cycles. The book presents a highly detailed characterization of the materials, together with an accurate measurement of their adsorption properties under dry conditions and in the presence of steam. It demonstrates that even small quantities of graphene oxide provide superior thermal stability to hydrotalcites due to their compatible layered structure, making them well suited as volume-efficient adsorbents for CO2. Lastly, it identifies suitable catalysts for the overall sorption-enhanced water gas shift process.

Author: Shahid ul-Islam
Publisher: John Wiley & Sons
ISBN: 1119509823
Category : Science
Languages : en
Pages : 661

View

Book Description
This groundbreaking book covers the recent advances in sustainable technologies and developments, and describes how green chemistry and engineering practices are being applied and integrated in various industrial sectors. Over the past decade, the population explosion, rise in global warming, depletion of fossil fuel resources and environmental pollution have been the major driving force for promoting and implementing the principles of green chemistry and sustainable engineering in all sectors ranging from chemical to environmental sciences. It plays a growing role in the chemical processing industries. Green chemistry and engineering are relatively new areas focused on minimizing generations of pollution by utilizing alternative feedstocks, developing, selecting, and using less environmentally harmful solvents, finding new synthesis pathways, improving selectivity in reactions, generating less waste, avoiding the use of highly toxic compounds, and much more. In an effort to advance the discussion of green chemistry and engineering, this book contains 19 chapters describing greener approaches to the design and development of processes and products. The contributors describe the production of third generation biofuels, sustainable and economic production of hydrogen by water splitting using solar energy, efficient energy harvesting, mechanisms involved in the conversion of biomass, green nanocomposites, bio-based polymers, ionic liquids as green solvents, sustainable nitrogen fixation, bioremediation, and much more. The book aims at motivating chemists and engineers, as well as postgraduate and PhD students and postdocs to pay attention to an acute need for the implementation of green chemistry principles in the field of chemical engineering, biomedical engineering, agriculture, environmental engineering, chemical processing and material sciences.

Author: Alirio Egidio Rodrigues
Publisher: World Scientific
ISBN: 1786343584
Category : Science
Languages : en
Pages : 365

View

Book Description
This book investigates the development of sorption enhanced reaction processes (SERPs) with detailed modelling and simulation, design and operation of units. SERPs are processes intensified by combining adsorption and reaction, reaction and membranes or reaction/adsorption/membranes in a single unit in order to overcome thermodynamic limitations of conversion in reversible reactions. The focus here is on gas phase and liquid phase processes involving different technologies, including pressure swing adsorptive reactors, membrane reactors and simulated moving bed reactors. Emphasis is also given to presenting data and practical applications of SERP products.Sorption Enhanced Reaction Processes provides undergraduate and graduate students of chemistry and chemical engineering, researchers and industrial engineers with a clear path towards process development of SERP, whatever the area of application.

Author: Qiang Wang
Publisher: Royal Society of Chemistry
ISBN: 1788011082
Category : Science
Languages : en
Pages : 362

View

Book Description
An introduction to the different inorganic adsorbents/sorbents used in pre-combustion carbon dioxide capture.

Author: Xiaogang Yang
Publisher:
ISBN:
Category : Electronic books
Languages : en
Pages : 0

View

Book Description
Hybrid Two-step synthesis method for preparation of MgAl LDHs materials for CO2 adsorption has been employed because of the features of fast micromixing and enhanced mass transfer by using a ,ÄòT-mixer,Äô reactor. MgAl LDHs with different morphologies were successfully obtained by three different synthesis routes: ultrasonication-intensified in ,ÄòT-mixer,Äô (TU-LDHs), conventional co-precipitation (CC-LDHs) and ultrasonic-intensified in ,ÄòT-mixer,Äô pretreatment followed by conventional co-precipitation (TUC-LDHs). The synthesized samples characterized by the XRD showed that LDHs formed a typical layered double hydroxide structure and no other impurities were identified in the compound. The SEM and TEM analyses also confirmed that the size distribution of TUC-LDHs was relatively uniform (with an average size of approximate 100¬†nm) and layered structure was clearly visible. The BET characterization indicated that such LDHs had a large surface area (235¬†m2¬†g,àí1), which makes it a promising adsorbent material for CO2 capture in practical application. It can be found that the CO2 adsorption capacities of TU-LDHs, CC-LDHs and TUC-LDHs at 80¬∞C were 0.30, 0.22 and 0.28¬†mmol¬†g,àí1, respectively. The CO2 adsorption capacities of TU-LDHs, CC-LDHs and TUC-LDHs at 200¬∞C were 0.33, 0.25 and 0.36¬†mmol¬†g,àí1, respectively. The order of CO2 adsorption capacity to reach equilibrium at 80¬∞C seen in Avrami model is: TU-LDHs > TUC-LDHs > CC-LDHs. The CO2 adsorption/desorption cycling test reveals that TU-LDHs and TUC-LDHs have good adsorption stability than CC-LDHs.

Author: Daniel Ogochukwu Okanigbe
Publisher: Springer Nature
ISBN: 3031224922
Category : Technology & Engineering
Languages : en
Pages : 327

View

Book Description
This book examines resource recovery and recycling from waste metal dust, including currently used techniques for waste processing and recycling and their applications, with practical examples and economic potentials of the processes. The focus of this book is on resource recovery by suitable treatments and techniques, including those of recovery by-products. For the first time, this book provides a comprehensive, one-stop reference including seminal principles and methods, the advantages and disadvantages of the processes discussed, and the economics of the technology. It will serve as a technical reference for working scientists and engineers, while serving as an educational reference to students studying the waste recovery of metals.

Author: Brian Darnell Shinall
Publisher:
ISBN:
Category : Carbon dioxide
Languages : en
Pages : 264

View

Book Description

Author: Peter D. Lund
Publisher: John Wiley & Sons
ISBN: 1118957865
Category : Science
Languages : en
Pages : 560

View

Book Description
The increasing deployment of bioenergy frequently raises issues regarding the use of land and raw materials, infrastructure and logistics. In light of these sometimes conflicting interests Advances in Bioenergy provides an objective and wide-ranging overview of the technology, economics and policy of bioenergy. Offering an authoritative multidisciplinary summary of the opportunities and challenges associated with bioenergy utilization, with international researchers give up-to-date and detailed information on key issues for biomass production and conversion to energy. Key features: *Discusses different bioenergy uses such as transportation fuels, electricity and heat production. *Assesses emerging fields such as bio-based chemicals and bio-refineries. *Debates conditions for the mobilization of sustainable bioenergy supply chains and outlines governance systems to support this mobilization. * Dedicated chapters to sustainability governance and emerging tools such as certification systems and standards supporting growth of a sustainable bioenergy industry. *Considers the political, environmental, social and cultural context related to the demand for energy resources, the impact of this demand on the world around us, and the choices and behaviours of consumers. This book will be a vital reference to engineers, researchers and students that need an accessible overview of the bioenergy area. It will also be of high value for politicians, policymakers and industry leaders that need to stay up to date with the state-of-the-art science and technology in this area.

Author: Claudia R. V. Morgado
Publisher: BoD – Books on Demand
ISBN: 9535112252
Category : Technology & Engineering
Languages : en
Pages : 474

View

Book Description
The reconciliation of economic development, social justice and reduction of greenhouse gas emissions is one of the biggest political challenges of the moment. Strategies for mitigating CO2 emissions on a large scale using sequestration, storage and carbon technologies are priorities on the agendas of research centres and governments. Research on carbon sequestration is the path to solving major sustainability problems of this century a complex issue that requires a scientific approach and multidisciplinary and interdisciplinary technology, plus a collaborative policy among nations. Thus, this challenge makes this book an important source of information for researchers, policymakers and anyone with an inquiring mind on this subject.