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I was researching into Codes and Guidelines for Blast Protection of Reactors (Hydrogenation). A non-US facility I was reviewing has a number of hydrogenators (approx 10,000 to 15,000 L) and there are no locally applicable codes that cover this use case. The end-use is specialty chemicals so...

Thanks @george Re. "if you use steam, the vent header will have to be piped such that you can collect condensate / drain out on a continuous basis. " This is where I am stuck. What sort of arrangement would you suggest / have you seen? I don't want to create additional hazards while...

I've a couple of questions re. venting of hydrogen from a 6000 L batch reactor at the end of a batch. I was doing a safety review and this is a specialty chemical facility and there's no flare just a vent stack. The amount of residual hydrogen is about 20% of the reactor volume and at low...

We are exploring the option of Nitrogen padding of drums (200 L) / totes (1000 L) before shipping for avoiding liquid product oxidation. Any guidelines on how this is done and what typical over-pressure to use etc? Any systems that are sold to do this? When I researched I find a lot of...

@EdStainless Thanks! Then I guess I will abort the 1200 C trial and try to figure out a lower operating temp. perhaps around 900 C I did check the Haynes data sheet. At 1100 C: 8 MPa produces 2% creep in 10 hrs. 6 MPa produces 1% creep in 10 hrs.

I came across this performance note about the alloy Hastealloy X, that mentions it retains its strength up to 1200 C. Any thoughts? Is that only a marketing hype pitch or would this be a viable candidate alloy? Or would it have the same, severe creep / strength limitations that would restrict...

@XL83NL All great points. Yes, a detailed mechanical review will be done before the build stage. Can you tell what MOCs you are using for your 950 C / 1250 C projects? One option for me may be to redo my conversion calculations at a lower T/P combination. @EdStainless: I could live with...

Thanks Ed! Gas pressure is 10 barg. I'm thinking of regulating this with a backpressure valve downstream. The gas is for most part superheated steam with some process gasses (10 parts of steam to 1 part of process gas) in the mix. The steam will be condensed downstream. No risk of corrossion...

I need to heat a process gas (@ 10 bar) to approx 1200 C for a short residence time for a chemical conversion in a pilot plant. The geometry I am considering is a 6" to 8" dia coil bundle (approx 20 turns ) made of Inconel / Hastealloy tube approx. 0.5" dia with a gas flame at the center...

@25352 Good idea. I hadn't thought of it. But I suppose that gets tricky because I have two liquids of different density? And then the density varies with Temperature. Though to be fair I don't need to be super accurate about levels. It's only a functional thing to keep the reactor ops stable...

We have a 2 Litre Lab reactor we wanted to convert to a CSTR trial. The reaction involved is Liquid Liquid and takes place at approx 130 C with 6 bars autogenous pressure. The reactor has in internal coil and a Rushton type stirrer magnetically coupled. Two liquids are co-dosed by dosing...

Thanks! I am in the process of evaluating. Will report what I find.

@ash9144 Thanks! What unit operations may be better explored for ppl separations? Adsorption? I know this may be a tad generic but I'm brainstorming for ideas.

If the specifications on a certain lower boiling impurity in the product is only 0.5 ppm is it feasible to reach such tight specs using distillation as a separation procedure? Or is distillation typically not the right seperation-operation choice for achieving such tight ppm level specs in...

@george Thanks for the tips. I checked out the manual. No help there regarding this particular limit. Regards your other question: I believe the F here is what's called the "F factor". My second screenshot shows this more clearly.

@don Thanks very much. So essentially under these conditions my column diameter is not flooding constrained but pressure drop constrained? A follow up question: For arguments sake assume this was a 100 mm Hg abs. pressure distillation. Still Sulcol warns me of the pressure drop the moment...

I was trying to size a column for vacuum distillation (10 mmHg) that uses Sulzer CY type packings. I'm using Sulocol, the vendor's sizing program and one aspect confuses me: For my column size the flood percent is quite low (40%) yet the pressure drop per unit meter (3.04 mbar/m) seems to be...

@Stonecold Very interesting. I did not know this.

@Stonecold Dumb & off-topic question: How did you realize that your reactor finally stopped arcing through the glass at Plug #19? Could you hear / see it? Or.....? Just curious.

@shvet Thanks. Indeed plugs are used for lining repairs. My question is, do they have any other function?