MODIFICATION
66 -- CONTINUOUS HYDROGENATION REACTOR
- Notice Date
- 2/11/2011
- Notice Type
- Modification/Amendment
- NAICS
- 334513
— Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables
- Contracting Office
- Department of Agriculture, Agricultural Research Service, North Atlantic Area, Area Office, 600 East Mermaid Lane, Wyndmoor, Pennsylvania, 19038, United States
- ZIP Code
- 19038
- Solicitation Number
- 108-0004-11
- Archive Date
- 3/9/2011
- Point of Contact
- Regina L. Dennis, Phone: 215-233-6553
- E-Mail Address
-
regina.dennis@ars.usda.gov
(regina.dennis@ars.usda.gov)
- Small Business Set-Aside
- Total Small Business
- Description
- This order is modified to address questions proposed by a prospective bidder. The solicitation will be extended until 02/22/2011. 1. Q: regarding the feed material (oil), it appears that it will need to be pre-heated before it can be readily pumped. Could you suggest the typical preheat temperature. A: The desired pre-heat temperature range (prior to pumping) is about 40 to 60°C. The preheat temperature (prior to reactor) is at or near desired reactor temperature. 2. Q: The same consideration applies to the product leaving the reactor: will this be free flowing or do we need to keep it warm too (and if so, typical temperature). A: The product liquid must be free flowing but upon exiting the reaction tube, will be cooled sufficiently to prevent loss of product and aid in collection of product. 3. Q: You do not specify the materials of construction for the reactor and wetted parts; I would think 316ss will be acceptable but confirm this please. A: 316ss is acceptable as long as the temperature and pressure requirements can be met. 4. Q: My understanding is that you want 3 different reactors which can be readily switched and these basically vary in size. You will only be using ONE of these at any time: please confirm. A: Only one reactor tube will be used at any one time. 5. Q: You specify three separate heating zones. Multiple zones are normally needed if the reactor is long and hence to avoid temperature gradients along the length. Regarding your particular reactors, I do not foresee that as a problem since the longest one is less than 5". It would be practically difficult to have more than one heating zone in such a short length but I don't think you will need more than one. Could you please comment. Just to clarify this further, we will supply reactors which are much longer than 5". The front-end will typically be packed with inerts and will act to mix and preheat the reagents before they enter the catalyst bed. It would also be possible to leave an inert section after the catalyst bed. There will be a cooler after the reactor (normally water cooled). A: We require 3 heating zones for the reactor columns. The measurements stated in #4 of the specs indicate the desired capacity of the portion of the reactor tube that will contain catalyst. The actual reactor columns will be typically three times the length of the catalyst portion to allow for the 3 heating zones. 6. Q: You mention also a co-current heat exchanger, I believe to pre-heat the liquid feed against the hot product. This is of course common practice on a large scale for heat recovery but it is not economic at this small scale. Remember the liquid flow you specify is only about 2.5 ml/minute and so the energy need to preheat this will be tiny. I have already commented on how we actually preheat. Therefore, with your permission we would like to suggest that the co-current heat exchanger be deleted and we include just a water cooled exchanger for the product. A: The counter-current pre-heater was chosen because our previous experiences dictate it to be more cost and energy efficient, especially for our desired temperatures. Other methods capable of achieving desired temperatures may be acceptable. 7. Q: You specify a manual back-pressure regulator and an air operated valve. Can you clarify the need for the air operated valve. (Normally, we would provided an automated back-pressure regulator but can supply a manual one if you prefer). A: A manual back-pressure valve is sufficient for our needs and automated control is not required, but is acceptable. We desire an air operated valve on both the nitrogen and hydrogen flow controllers. As a safety precaution, the hydrogen flow may be automatically shut down to allow for nitrogen to flood the system.
- Web Link
-
FBO.gov Permalink
(https://www.fbo.gov/spg/USDA/ARS/NAAO/108-0004-11/listing.html)
- Place of Performance
- Address: USDA, ARS, ERRC, 600 East Mermaid Lane, Wyndmoor, Pennsylvania, 19038, United States
- Zip Code: 19038
- Zip Code: 19038
- Record
- SN02378414-W 20110213/110211234247-47b5906326684af274e8fbf4a164d1d8 (fbodaily.com)
- Source
-
FedBizOpps Link to This Notice
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