Chemical engineering Definition and 228 Threads

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I am having difficulty in finding a solution that can etch away tin compounds in my metallic surface. The metallic surface has a composition of palladium, copper, and silver. There is a tin compound deposited on the surface which I would like to etch away or remove. This is on a microscopic...

Homework Statement [/B] A fuel gas consists of 75% butane (C4H10), 10% propane (C3H8) and 15% butene (C4H8) by volume. It is to be fed to the combustion chamber in 10% excess air at 25°C, where it is completely burnt to carbon dioxide and water. The flue gases produced are to be used to...

Hello everyone! I'm currently a student about to get my AA degree at the end of the semester so the time has come for me to transfer from community college to university and, most importantly, decide on a major. Throughout my college career thus far, I've bounced around with ideas like...

What is the protocol used to prepare poly (lactic-co-glycolic acid) (PLGA) nanoparticle? What are the different methods of producing it?

Homework Statement A mixture of hydrogen, carbon monoxide and carbon dioxide is being fed to a compressor at 2.0 bar and 25 C. The overall flow rate is 17.47 SCMS and its composition is 73.5 mol% H2, 13.7 mol% CO and the balance CO2 The compressor operates adiabatically and reversibly with a...

Hello. I wanted to see how much more efficient a car would be if hydrogen and oxygen (created through electrolysis of water) were injected into the engine alongside gasoline. I got lost when I found out that I would need 241.8 kJ/mol of water to electrolyze it...

Hello, I tried attempting the following example problem 11.1(please see below), however I don't quite get from where they got cp=1.00 and cv=0.717? I know that Q=m*cp*delta T=> cp=Q/(m*delta T) Q=n*cv*delta T=>cv=Q/(n*deltaT) Problem statement Their solution: How did they...

Hi, Our lecturer explained us the Reynold Transport theorem, its derivation , but I don't get where the - sign in control surface 1 comes from? He said that the Area goes in opposite direction compared with this system. I can't visualise this on our picture. Can you please help me understand...

Homework Statement Toluene, C7H8, is burned with 30% excess air. A bad burner cause 15% of the carbon to form soot (pure C) deposited on the walls of the furnace, what is the Orsat analysis of the gases leaving the furnace?Homework Equations C7H8 + 9 O2 => 7 CO2 + 4 H2O 30% excess of air What...

How does one depict R= 1 × 10-6 , and subsequently a y-intercept of y = 6 × 10-6 on a y-x diagram? I'm new to the concept and very confused. From my understanding, this means that the reflux is essentially 0. It's also assumed that the distillate is purely vapour, so XD = 0 as there is no...

Hey! I have a question regarding this question that I have to answer. It is about the kinetics of a substance X whose product is 2Y. It is in Swedish and here is the translation: The absorbance of a 0,030M-solution of X was calculated with the help of a Spectrometer. The Spectrometer was...

Hello all, So I've finished my first year of classes. Since my school has a credit window for declaring engineering majors, I need to lock in my life-long career decision. I definitely want to stick with engineering, but I was curious if ChemE is the right one for me. From what I've read, the...

Hi! I'm a newbie here from Chem Engineering Im trying to build up my motivation back in this major. I don't hate Chem Eng courses, but I DONT FEEL MYSELF IS DEVELOPING IN THIS AREA. * I chose ChemEng in the first place because I was okayy in Sc and Maths subjects BACK THEN in high school...

Homework Statement Homework Equations 0=viscous+gravitational+pressure I saw in the solutions that pressure=0 in this case, but why? I also knew that : accumulation= flow in - flow out+generation, why not use this one? The Attempt at a Solution (their solution) We are interested in...

I have been accepted to the UT Austin Cockrell School of Engineering for Mechanical Engineering in Fall 2017. I'll be starting as a sophomore because I have finished all my general education requirements. However, I am not entirely sure I want to stick to MechE. I have been considering Chemical...

Homework Statement The American Petroleum Institute has published a correlation for determining the hydrocarbon emissions from fixed-roof storage tanks Ly = (24/1000) * (p/(14.7-p))^0.68 * D^1.73 * H^0.51 * T^0.5 * Fp * C where: Ly is breathing emissions, bbl/yr; p is the true vapor pressure...

I noticed that my windshield washer fluid has methanol in it to reduce the temperature of which it freezes. I know it freezes at approximately -28°C which gives us a concentration of MeOH at approximately ~30% by weight. However, when I try to calculate the required methanol using the mSolute...

So, I am new to here and I am currently a technician that does vacuum systems for the semiconductor industry (mainly Electrical). I came across something today that has me quite perplexed. So We have this system that flows gas through 1/4" stainless tubing to a pump to dilute gasses and...

Hi, I was asked by my senior to find out what this graph is and how to use it. No details were given as to where they found it. I know already that this is used to compare CSTRs and PFRs performance for first order reactions, but I can't deduce what the expressions Dd/(vxL) and kL/vx are for...

I really like Chemistry. I like physics but not as much as physics. Is it likely that Physics Forums will intrigue me? I found this website trying to find the model on how to solve a chemistry problem but I really enjoy the overall quality of website and was thinking I would give it a shot.

Question: So I hold a Bachelor's degree in Chemistry and have just started a M.S./Ph.D. track in Chemical Engineering. My dream job is in mineral processing (the biggest dream is with an asteroid mining company), but I understand that the school I'm going to is heavily focused on drug discovery...

Homework Statement Felder & Rousseau 4.73 (p. 184) A mixture of propane and butane is burned with pure oxygen. The combustion products contain 47.4 mole % H2O. After all of the water is removed from the products, the residual gas contains 69.4 mole% CO2 and the balance is O2. What is the mole...

If I'm designing an injector for a rocket engine, I have a specific mean flow rate (m/s) that must be met due to the pipe diameter and the required mass flow rate. I've calculated all the pressure drops due to lost work from friction, valves, and orifice geometries (not from change in area, but...

What is the heat capacity values of diesel in liquid and vapour state?

Homework Statement If I have a closed loop second order transfer function such as: $$\frac{10-s}{0.3s^2+3.1s+(1+24K_{C})}$$ Can I still use this formula for overshoot (when a step input is applied) ?: $$\frac{A}{B}=e^{\frac{-\pi \zeta}{\sqrt{1-\zeta^2}}}$$ Where B is the step input size I...

What's up! I am a Chemical Engineering student who enjoys solving physics and chem problems while drinking a brew or two=D

Here is some background to the problem (in a stirred tank): "With yield stress non-Newtonian (viscoplastic) fluids, it is possible to generate an agitated volume around the impeller, defined as a cavern, surrounded by a stagnant region where the shear stress is insufficient to overcome the...

I was just hoping for a bit of feedback on how realistic of a transition this would be. I'm nearing the end of an honors degree in chemistry and the job prospects look a bit dire. In my area there are lab technician jobs that require the applicant to have a degree, and the pay is less than what...

Consider I have a packed column of length L filled with known characteristic adsorbent. I am putting a mixture of N components in it and I am solving for concentration of each component in mobile phase at the outlet of the column. The equations which are to be generalised are as follows: An...

I used to be a chemical engineer for a bad company that treats its employees very poorly. Ever since leaving that place, I've been trying to transition into the tech industry, because it's where all the new, and exciting stuff happens. I'm particularly interested in battery technology, because I...