From:
Monona Rossol <0000030664c37427-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
Subject:
Re: [DCHAS-L] [*Newsletter*] [DCHAS-L] SF6 for demonstrations
Date:
Mar 20, 2023 16:33 UTC
Reply-To:
Monona Rossol <actsnyc**At_Symbol_Here**cs.com>
Message-ID:
<1348448691.2631919.1679330029373**At_Symbol_Here**mail.yahoo.com>
In-Reply-To:
<49FADA47-5B27-4BE7-8BB7-FB827B143EEE**At_Symbol_Here**helixenv.com>
Monitoring CO2 decay rates is one really good way to calculate air changes/hour to check ventilation. But you sure don't need to release a metric ton of it.
Google zacht: Actual volume of one metric ton of carbon dioxide gas At standard pressure and 15 °C (59 °F) the density of carbon dioxide gas is 1.87 kg/m3 (0.1167 lb/ft3). One metric ton (2,205 lb) of carbon dioxide gas occupies 534.8 m3 (18, 885 ft3, 117,631 US gallons).
You just need a spritz. Monona
-----Original Message-----
From: Ralph Froehlich <rfroehlich**At_Symbol_Here**HELIXENV.COM>
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Sent: Fri, Mar 17, 2023 2:24 pm
Subject: Re: [DCHAS-L] [*Newsletter*] [DCHAS-L] SF6 for demonstrations
Many researchers use CO2 from a fire extinguisher as the test gas for fluid dynamics and ventilation studies.
What types of demonstrations are they wanting to see? Sulfur hexafluoride has the highest global warming potential of ANY chemical known to Man at 23,500 (CO2 = 1), which is why it’s been phased out of nearly every industrial process. From a GWP/atmospheric perspective, consider that the loss of 42.6 g of SF6 is equivalent to 1 metric ton of CO2. Just 42.6 g. All that is to say whatever you decide to do, please be responsible.
Dan
Hello, everyone,
I have been tasked with investigating procedures for use of SF6 for lecture demonstrations. So I wanted to check in with you all to find out if you have any experience with supplying or supporting this demo and if so what tips, pointers, precautions, and/or prohibitions you might be willing to pass on.
Any help or info much appreciated,
Melinda Box, MEd, CCHO
Elon University
Chemistry Dept Lab Manager
(336) 278-6225
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