Chemical engineering lecture videos on heat transfer, energy balances and more as presented to various undergraduate university/college students at the University of the Witwatersrand, Johannesburg as part of different process engineering fundamental courses and environmental engineering.
Many of the videos are linked to notes presented on Research Gate on process engineering fundamentals (www.researchgate.net/profile/Kevin-Harding).
Disclaimer: Errors and omissions are acknowledged. Corrections and comments for improvements are welcomed for future updated videos. Some videos are not the most up-to-date versions, which are restricted to registered students.
How much essential oil did that amount of material yield?? I’m trying to figure out if a smaller 250-500mL set up works or if I should just buy a still where u can put 50L+ and maybe make spirits 🤔
I have various herbs at home. Fragrant flowers. Lemongrass. Lavender - I do use a diffuser for aroma therapy… my wife makes her own body butter so essential oils would be good. But I also wouldn’t mind making a gallon of whiskey. I’m wondering if bigger is better or if small-medium will do for my needs.
Hey, could you give a link to get the steam tables, i am conducting my plant design in cumene production and its difficult for me to get a data properties at different temp & pressure especially C9-C12
Hello!! Thank you for this beautiful and precise demonstration. It would be really helpful if you could help me with a doubt. Actually, I have been trying to extract pure essential oil from Neem Leaves (crushed to powder) using a steam distillation apparatus and for my solvent I have been using ethanol and methanol in a 50:50 ratio Am I on the right path? If you could guide with any of your suggestions and knowledge, it would be really helpful for me.
Exactly the same way, using a conductive heat transfer coefficient for stationary air. pubs.aip.org/aip/jpr/article-abstract/14/4/947/241383/Viscosity-and-Thermal-Conductivity-of-Dry-Air-in
In some experiments we do. One of our reasons to avoid mixing is to be able to separate the biomass from the hot water more easily at the end of the experiment, and start a new run with water that is already somewhat heated.
Detailed Summary for [Introduction to Environmental Law 00:08 Understanding the impact of environmental law - How engineers are accountable - The risks companies face - Preventing environmental degradation from a legal perspective 00:27 Take reasonable measures to prevent pollution and environmental degradation - Educate employees about avoiding environmental harm - Strive for ISO 14001 Environmental Management System accreditation 00:49 Adhering to environmental laws is crucial - The consequences of not adhering to environmental law can include imprisonment, fines, negative perceptions, and job loss. - Environmental law gained significance after the Industrial Revolution and the Stockholm convention. 1:12 Environmental law has various aspects - These aspects include legislation, common law, religious based systems, and international law - A hierarchy is established to determine the precedent of legislation, from constitution to local bylaws 01:32 South Africa follows Roman-Dutch law and the Constitution as the highest law of the land. - Common law applies in South Africa based on Roman-Dutch law and case law interpretation. - The Constitution of South Africa protects basic human rights, equality, and measures against unfair discrimination. 01:49 Every citizen has the right to a protected and healthy environment. - The environment should be free from pollution and ecological degradation. - Conservation should be promoted to preserve the environment. 02:07 Protecting the environment and promoting sustainable development - Various Acts exist to protect different aspects of the environment - Some Acts deal with conservation, living resources, pollution, and other aspects of environmental management 02:28 This course covers occupational health and safety. - Acts related to occupational health and safety may be applicable. - Each province and city may have their own legislation and local bylaws.
Hi, i represent an NGO that works in the field of menstrual hygiene. We are based in delhi and do our projects in rural areas of Mathura region. Where is your lab located? We would like to explore the possibility of introducing these non synthetic pads in our projects. How can we contact you for further discussion
Hello. I am surprised that From Delhi you are curious about organic sanitary pads. In Tamilnadu many women are doing organic sanitary pads with cotton and herbals. Thank you
Consider using a Clevenger apparatus or a Dean Stark trap in place of the separatory funnel . Also you can prevent over pressure by using a couple of cotton balls on top of the still head instead of a thermometer. The thermometer is not needed in this setup
@@kgharding29 I use a hand held laser thermometer made by Klein Tools. It allows me to check temp at any point in the system. It's quite accurate. It registers in both F and C.
What size tubing did you use? Also may I know the general dimensions of the print? I think my 3D printer resized it incorrectly and I am afraid I will buy the wrong tubing
If for the screw, you print the cylinder walls on the exterior of the screw as a single print (except for 5-10mm at the bottom and top respectfully for input/output) then you wont need to engineer clearance. You'll have a straw you can rotate.
It may not have come across here, it should have in the longer version of this video (ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-GfFLm9IbruU.html), but I try and rather use the word "cleaner" in a classroom setting. However, there is debate if this is even true.
The value of the heat of mixing in this example was given at 25degC (possibly not made clear enough in the video), and as such the basis of each of NaOH and H2O was taken from the same point. The way the question is solved, you should note that if you had taken a different starting temperature (basis) for the individual chemicals, then heated to 25degC, the maths cancels out in such a way that this would not have made a difference to the final answer.
Good presentation Proff...appreciate that..Can you post similar presentation on renewable but covering green hydrogen technology , Principles, application, technology updates etc..
I suggest you improve the microphone. there are many way on how on RU-vid. also I am not sure if "material balance system" is something I really need to do as process engineer? Thanks for the video. :)
Thanks for the comment. The fact that you feel this little channel needs to invest in a better microphone means its reaching further than originally intended! Do you need material balances? - Material balances (MB) lead to energy balances, energy and electricity calculations, and power requirements. - They form the basis for reactor calculations and reactor engineering. - MB are also the basis for many other calculations, including costing and sizing of equipment and overall plant requirements, utilities and other needs. - Without material balances it is impossible to perform many environmental assessments - and probably many more that I have forgotten at this moment. So yes - I do think you need to know this.
I need guidance brother, I'm going to start my job as a trainee process engineer in pharmaceutical industry API plant. What should i learn before joining
@@kgharding29Hello Proff, i have a Masters in Engineering (Chemical ), i want to apply for a common wealth scholarship in UK, i am required to get an admission letter from at least 2 Universities in UK and also a supporting statement from a UK university supervisor is required. Kindly assist on these please, i am opened to any phd field of study.
What is it degrading into? Is it not just “dissolving” the material into microscopic pieces and not back into its original compounds ? It’s a very interesting topic though Prof
The important question remains unanswered: how to decide which is the better configuration for a given system curve? It would be great to extend this discussion and show different system curves and how they behave with pumps in parallel vs series and show that some system curves favor series and some favor parallel.
