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"Chemical engineering"
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Chemical engineering : an introduction
\"Chemical Engineering: An Introduction is designed to enable the student to explore a broad range of activities in which a modern cheical engineer might be involved by focusing on mass and energy balances in liquid-phase processes. Thus, in one semester, the student addresses such problems as the design of a feedback level controller, membrane separation, and hemodialysis, optimal design of a process with chemical reaction and separation, washout in a bioreactor, kinetic and mass transfer limits in a two-phase reactor, and the use of the membrane reactor to overcome equilibrium limits on conversion. Mathematics is employed as a language, but the mathematics is at the most elementary level and serves to reinforce what the student has already studied; nothing more than basic differential and integral calculus is required, together with elementary chemistry. Students using this text will understand what they can expect to do as chemical engineering graduates, and they will appreciate why they need the courses that follow in the core curriculum\"-- Provided by publisher.
Book
Industrial Chemistry
Along with the first volume on \"Industrial Chemistry\" this book discusses, illustrates and explains many of the major chemical processes performed by industry, looks at how transformations affect the quality of our lives, examines the various types of waste produced as necessary products are developed and marketed, and shows techniques and practices in which many industries have made strides to improve or \"green\" specific chemical processes.
eBook
Chemical engineering and chain reactions
Examines how chemical engineers combine the science of chemistry with the engineering design process to develop products used in daily life such as cleaning supplies, fuels, and medicines.
Book
Sustainable Design through Process Integration - Fundamentals and Applications to Industrial Pollution Prevention, Resource Conservation, and Profitability Enhancement
This book is professional reference that shows how mass integration techniques are used to maximize efficiency and sustainability and minimize the pollution of process systems and plants. Plant and unit operations professionals will save time and money by using the detailed tools and applications as part of their understanding of systematic process development. More generally it will be an important resource for those working with what commonly referred to as P2 (Pollution Prevention) technology. In addition to practitioners developing new systems and, more commonly, retrofitting old systems, the book will also find a significant market as a reference for researchers, and graduate level students taking courses in sustainable process systems/process integration/process synthesis and optimization/mass integration and related topics. The author is recognized as a foremost expert on mass integration for process efficiency and pollution prevention. No other reference is available on this fast developing topic.
eBook
Chemical Process Equipment - Selection and Design (Revised 2nd Edition)
A facility is only as efficient and profitable as the equipment that is in it. This highly influential book is a powerful resource for chemical, process, or plant engineers who need to select, design or configure plant successfully and profitably.
Written by some of the most experienced and well-known chemical and process engineers in the industry today, this information-packed volume gives the chemical or process engineer or engineering student all of the guidelines for the design and selection of chemical process equipment. Comprehensive and practical, its scope and emphasis on real-world process design and performance of equipment will prove invaluable for day-to-day problem solving.
eBook
High-frequency and intrinsically stretchable polymer diodes
Skin-like intrinsically stretchable soft electronic devices are essential to realize next-generation remote and preventative medicine for advanced personal healthcare
1
–
4
. The recent development of intrinsically stretchable conductors and semiconductors has enabled highly mechanically robust and skin-conformable electronic circuits or optoelectronic devices
2
,
5
–
10
. However, their operating frequencies have been limited to less than 100 hertz, which is much lower than that required for many applications. Here we report intrinsically stretchable diodes—based on stretchable organic and nanomaterials—capable of operating at a frequency as high as 13.56 megahertz. This operating frequency is high enough for the wireless operation of soft sensors and electrochromic display pixels using radiofrequency identification in which the base-carrier frequency is 6.78 megahertz or 13.56 megahertz. This was achieved through a combination of rational material design and device engineering. Specifically, we developed a stretchable anode, cathode, semiconductor and current collector that can satisfy the strict requirements for high-frequency operation. Finally, we show the operational feasibility of our diode by integrating it with a stretchable sensor, electrochromic display pixel and antenna to realize a stretchable wireless tag. This work is an important step towards enabling enhanced functionalities and capabilities for skin-like wearable electronics.
A stretchable anode, cathode, semiconductor and current collector have been developed to create stretchable diodes that can operate at megahertz frequencies for use in wirelessly operated, skin-like wearable electronics.
Journal Article
Design and synthesis of ZnCo2O4/CdS for substantially improved photocatalytic hydrogen production
In this study, the hydrogen evolution performance of CdS nanorods is improved using ZnCo
2
O
4
. ZnCo
2
O
4
nanospheres are synthesized using the hydrothermal and calcination methods, and CdS nanorods are synthesized using the solvothermal method. From the perspective of morphology, numerous CdS nanorods are anchored on the ZnCo
2
O
4
microspheres. According to the experimental results of photocatalytic hydrogen evolution, the final hydrogen evolution capacity of 7417.5 µmol·g
−1
·h
−1
is slightly more than two times that of the single CdS, which proves the feasibility of our study. Through various characterization methods, it is proved that the composite sample has suitable optoelectronic properties. In addition, ZnCo
2
O
4
itself exhibits good conductivity and low impedance, which shortens the charge-transfer path. Overall, the introduction of ZnCo
2
O
4
expands the adsorption range of light and improves the performance of photocatalytic hydrogen evolution. This design can provide reference for developing high-efficiency photocatalysts.
Journal Article