Skip to main content
14 votes
Accepted

What are introductory level books on chemical engineering?

I'm studying chemical engineering for more than two years and what I can tell you is that there is not really a lot of "good" books you may read as an introduction. You have to understand ...
ParaH2's user avatar
  • 4,217
8 votes

Mixing Supplements - Will the Distributions Remain?

It's hard to maintain homogeneity for the mix of powders. The bigger the batch, the less homogeneous it's going to be. Ideally you want to disperse solid ingredients; there are several techniques to ...
andselisk's user avatar
  • 38.1k
6 votes
Accepted

How can hydrogen and oxygen coexist in high temperature? Where did the oxygen come from?

I'll answer the question in general of how Hydrogen and Oxygen can coexist in metastable mixtures at higher temperatures, though without hazarding a guess for your specific case. Like you and others, ...
Michael Irving's user avatar
6 votes

A chamber to control concentration of a vapor: Is there a name for this equipment?

There is a book The Design of Controlled-atmosphere Chambers for the Study of Oxygen Toxicity, so I suggest "contolled-atmosphere chamber".
DavePhD's user avatar
  • 40.7k
6 votes

What non-toxic non-corrosive liquids are used for heat transfer?

Mineral oil should be good (aka white oil). Vary similar to motor oil , flashpoints not easy to find but around 450 F. Or, for a much higher flash point- phosphate ester. I don't know what it is but ...
blacksmith37's user avatar
  • 3,749
6 votes

What scientific and technical challenges prohibit the industrial use of the Sabatier reaction?

The primary barrier to all related reactions is their economics There are a number of ways to produce useful synthetic hydrocarbons from various carbon-containing sources. The Sabatier reaction might ...
matt_black's user avatar
  • 36.8k
5 votes
Accepted

Studying chemical engineering

I can speak based on my experience studying chemical engineering as an undergraduate at an ABET accredited university in the United States and working in industry. A typical curriculum would include ...
Ohio ChemE's user avatar
5 votes
Accepted

What chemical reactions takes place in purifying acetylene?

The main impurities of $\ce{C2H2}$ are : 1) $\ce{H2}$ destroyed by $\ce{MnO2}$, 2) $\ce{NH3}$, destroyed by copper sulfate, mercury chloride and and ferrous chloride, 3) $\ce{PH3}$, destroyed by ...
Maurice's user avatar
  • 28.6k
5 votes

Suitable solvents to dissolve Aluminum Chloride (anhydrous) without generating Hydrochloric Acid (aqueous or gas)

Several common organic solvents will dissolve this compound which has a lot of covalent character. From Wikipedia: Soluble in hydrogen chloride, ethanol, chloroform, carbon tetrachloride Slightly ...
Oscar Lanzi's user avatar
  • 58.6k
4 votes
Accepted

How to use a modified Peng-Robinson equation to calculate a density?

According to this source: The popular EoSs such as Soave-Redlich-Kwong (SRK) [1] and Peng-Robinson (PR) [2] predict liquid density with an average absolute error of about 8%, much higher than ...
Vinícius Godim's user avatar
4 votes
Accepted

Conservation rule in closed systems

With 6 components and 4 reactions, you must have two conservation rules (that is, if the reactions are independent, which they are). Mathematically, we find ourselves in a 6D space (as there are 6 ...
Ivan Neretin's user avatar
  • 31.2k
4 votes

Suitable solvents to dissolve Aluminum Chloride (anhydrous) without generating Hydrochloric Acid (aqueous or gas)

If there is an industrial application, costs including disposal of solvent will be important. A possible solution, if the material cannot be scraped or shoveled out, might be to dissolve it with ...
Robert DiGiovanni's user avatar
3 votes
Accepted

Why do we use Ḡ ("G bar") as a notation for partial molar free energy?

Thermodynamic properties are functions of composition, which can be represented as $(\chi _1,...,\chi _N)$ where $\chi _i$ is the mole fraction of component $i$ present in the system. Now imagine a ...
Buck Thorn's user avatar
  • 22.4k
3 votes
Accepted

Does this reaction require catalyst/solvent?

Phenols react with aromatic acid chloride in the presence of a base such as $\ce{NaOH}$ at room temperature. Such reactions are called Schotten-Baumann type reactions (Ref.1&2; both are in German)....
Mathew Mahindaratne's user avatar
3 votes

Does this reaction require catalyst/solvent?

Just three points why omitting a solvent might not be a good idea without experimental evidence that support the contrary: There is a reason many organic syntheses are run with reagents in a ...
Buttonwood's user avatar
  • 30.1k
3 votes

Can a reactor be operated at both reflux and above atmospheric pressure?

You could theoretically boil at the higher temperature but why would that be a requirement? Why would you require reflux specifically if you can actually heat the formic acid to higher temperatures ...
Beerhunter's user avatar
  • 2,201
3 votes
Accepted

How do you figure out fuel specific impulse non-experimentally?

The relevant property is the temperature of the burnt fuel when it leaves the rocket engine nozzle, i.e. when it stops exchanging impulse with the engine. That temperature you can convert into a ...
Karl's user avatar
  • 12.1k
3 votes
Accepted

Thermodynamics - Series Reaction - Estimating mols of reactants based on Free Energy of Rxn

What you do is write $[D]=[C]K_{CD}$, $[C]=[B]K_{BC}$, and $[B]=[A]K_{AB}$. So, $$[C]=K_{BC}K_{AB}[A]$$ and $$[D]=K_{CD}K_{BC}K_{AB}[A]$$So, $$[A]+[B]+[C]+[D]=(1+K_{AB}+K_{BC}K_{AB}+K_{CD}K_{BC}K_{AB})...
Chet Miller's user avatar
  • 13.5k
3 votes

Using the right equipment for successful detection of Novichok

Lacking additional information, answers likely will be speculation-based only. To mention a few factors to consider: Stating GC-MS analysis only states, that there is technique to separate compounds ...
Buttonwood's user avatar
  • 30.1k
3 votes

What non-toxic non-corrosive liquids are used for heat transfer?

A good starting suggestion is probably a mineral oil. These are often used in small scale labs for heating baths that need to reach temperatures much higher than boiling water. So they should be ...
matt_black's user avatar
  • 36.8k
3 votes

What non-toxic non-corrosive liquids are used for heat transfer?

You can use a heat transfer oil like Mobiltherm 610. They also have some other oils that you can use, if you are able to shield the surface of the oil from the air. If you use a lower grade oil, it ...
Skaihoj's user avatar
  • 31
3 votes
Accepted

HCN reactor design

I will lead you to the general equation. We can relate the partial pressure of a species with conversion by using a simple stoichiometric table. The reaction is $$ \ce{NH3(g) + CH4(g) -> HCN(g) + ...
Metal Storm's user avatar
  • 3,476
2 votes

Simple alternative to UNIFAC to prove that a mixture containing 1ml of x and 5 litres of propylene glycol is not flammable?

UNIFAC is not a procedure, unless by chance in a similar field two things got the same name, which is unlikely. UNIFAC is used by activity coefficient models for ...
B. Kelly's user avatar
  • 1,074
2 votes

Quasi-static implies that T aprox equals Tsurr?

In my judgment, when they are talking about irreversible cycles, they are referring to idealized cases in which (a) the process is internally reversible with respect to the working fluid but (b) ...
Chet Miller's user avatar
  • 13.5k
2 votes
Accepted

Equation for overall heat transfer coefficient

This is the heat equation analogue to Ohm's law, in which resistances are additive (in series), and hence the inverse conductances are additive. The way to reason is that the full equation (1) for ...
Buck Thorn's user avatar
  • 22.4k
2 votes

What would be a stable way to hold lithium hydride powder?

If the LiH needs to be exposed to ambient conditions, it should be enclosed is a moisture-impermeable container, e.g., a glass ampoule which is closed off. Glass can be blown quite thin - but then you ...
James Gaidis's user avatar
2 votes

Flow rate of the fuel consisting of ethanol and water burning in air of a given flow rate

You calculated 83.3 moles of air reacting with the ethanol. Since air is 21% oxygen, this means that 83.3 x 0.21 = 17.5 moles of oxygen react with the ethanol. Since each mole of ethanol reacts with ...
Chet Miller's user avatar
  • 13.5k
2 votes

Flow rate of the fuel consisting of ethanol and water burning in air of a given flow rate

I think you overcomplicate the problem. There are many variables you don't need and many components that are duds (nitrogen, water, pressure). What important is that we burn ethanol: $$\ce{C2H5OH + 3 ...
andselisk's user avatar
  • 38.1k
2 votes
Accepted

Heat of formation method

You're confusing different enthalpies (don't worry, it seems to be rather common). Let's stick with NO as an example. The standard enthalpy of formation, $\Delta_fH^\circ$, is defined as the enthalpy ...
voffch's user avatar
  • 783
2 votes
Accepted

Energy balance for a system

The only three terms that need to be taken into account are $\dot{W}$, $\Delta \dot{E_p}$ and $\Delta \dot{E_k}$, as there's no heat involved. I use the 'dot' notation to indicate these are energies ...
Gert's user avatar
  • 1,927

Only top scored, non community-wiki answers of a minimum length are eligible