Clean Air Technology Center
Lots of fact sheets for various control technologies. Includes typical control efficiency ranges and very rough cost estimates.
Environmental Technology Verification Program, Air Pollution Control Technology Center
Generally more current than the CATC, but far fewer resoucrces.
Historical Chemical Engineering Plant Cost Indices
CEPCI for 1950 through 2006
Equipment cost scaling factors
Includes X^0.6 rule for scaling known price of equipment at size A to unknown price of similar equipment at size B.
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Thursday, March 24, 2011
Tuesday, March 22, 2011
Nuclear Energy Pro and Con
Two interesting articles from the Chemical Engineering magazine evaluating nuclear energy--one for and one against. Especially interesting now that we've seen demonstrated some of the risks.
Nuclear Energy: A Vital Component of Our Energy Future
Nuclear Renaissance: A Flawed Proposition
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Nuclear Energy: A Vital Component of Our Energy Future
Nuclear Renaissance: A Flawed Proposition
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Thursday, March 17, 2011
Proposed Utility MACT
Link to EPA site with proposed rule, fact sheets, and presentation (click on title).
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Monday, March 7, 2011
Updated NO2/SO2 1-hr modeling guidance
EPA released additional guidance for modeling 1-hour NO2 NAAQS compliance 3/1/2011. It updates OLM and PVMRM policy, addresses significant contribution analyses using the SILs, and discusses how to perform cumulative analyses including the option of incorporating temporally-varying background concentrations.
It also "[r]ecommends that compliance demonstrations for the 1-hour NO2 NAAQS address emission scenarios that can logically be assumed to be relatively continuous or which occur frequently enough to contribute significantly to the annual distribution of daily maximum 1-hour concentrations based on existing modeling guidelines, which provide sufficient discretion for reviewing authorities to not include intermittent emissions from emergency generators or startup/shutdown operations from compliance demonstrations for the 1-hour NO2 standard under appropriate circumstances."
3/1/2011 Policy Memo
See this blog post for access to previous memos.
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See this article for a helpful discussion of the state of SO2 and NO2 1-hr NAAQS modeling guidance, including April updates to AERMOD and AERMET. It also talks about recent EPA guidance to states for 1-hr SO2 NAAQS attainment designation.
(added 5/20/2011, KMM)
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It also "[r]ecommends that compliance demonstrations for the 1-hour NO2 NAAQS address emission scenarios that can logically be assumed to be relatively continuous or which occur frequently enough to contribute significantly to the annual distribution of daily maximum 1-hour concentrations based on existing modeling guidelines, which provide sufficient discretion for reviewing authorities to not include intermittent emissions from emergency generators or startup/shutdown operations from compliance demonstrations for the 1-hour NO2 standard under appropriate circumstances."
3/1/2011 Policy Memo
See this blog post for access to previous memos.
***
See this article for a helpful discussion of the state of SO2 and NO2 1-hr NAAQS modeling guidance, including April updates to AERMOD and AERMET. It also talks about recent EPA guidance to states for 1-hr SO2 NAAQS attainment designation.
(added 5/20/2011, KMM)
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Friday, March 4, 2011
Boilers NESHAPs, Final 2/21/2011
UPDATE: On May 18, EPA suspended for reconsideration the major source boiler MACT (Subpart D5) and the CISWI Rule. No date was given for completion of the review.) (KMM 6/27/11)
Go to this EPA web site for a compilation of actions related to the boiler MACTs and the CISWI rule.
Finalized NESHAP for:
Here's an article analyzing the rules and related issues.
Here are some applicability and requirements flow charts that Joe and Rebecca (and ??) prepared (click on links to pull up each chart):
See 5/5/2010 post for background on proposed rule.
(title is link to EPA site with rules and fact sheets)
Go to this EPA web site for a compilation of actions related to the boiler MACTs and the CISWI rule.
Finalized NESHAP for:
- Area Source Industrial, Commercial, and Institutional Boilers (JJJJJJ)
- Major Source Industrial, Commercial, and Institutional Boilers and Process Heaters (DDDDD)
Here's an article analyzing the rules and related issues.
Here are some applicability and requirements flow charts that Joe and Rebecca (and ??) prepared (click on links to pull up each chart):
See 5/5/2010 post for background on proposed rule.
(title is link to EPA site with rules and fact sheets)
Wednesday, March 2, 2011
FLIR Camera Gas Detecting Capability Detemination
Here is a website to determine if our FLIR camera can detect a specific gas:
NIST Chemical Name Search
1) Type in the name of the gas
2) Keep "SI units" button checked
3) Check the "IR spectrum" box under "other data"
4) Press "search" button
You will then be directed to another page with all the information regarding your selected gas. Scroll down to "IR Spectrum" and you will fine a bullet with "gas" next to it (linked text). Click on it. It will direct you to another page with a chart on it. The chart will be "transmittance vs. infrared spectrum". The bottom of the chart will have three dropdowns. Change "Reverse X" to "Normal X" and "cm-1" to "um (micro meter)".
This shows the transmittance signature of a particular gas. Our camera detects medium wavelength gases (between 3 and 5 micro meters). If the signature has a trough within that wavelenght range, the camera will pick it up. Anything above or below this range will not be detected. The camera detects "enes" (e.g., benzene), "anes" (e.g., methane) and "ones" (e.g., methyl ethyl ketone). It also does others that aren't yet FLIR lab verified.
NIST Chemical Name Search
1) Type in the name of the gas
2) Keep "SI units" button checked
3) Check the "IR spectrum" box under "other data"
4) Press "search" button
You will then be directed to another page with all the information regarding your selected gas. Scroll down to "IR Spectrum" and you will fine a bullet with "gas" next to it (linked text). Click on it. It will direct you to another page with a chart on it. The chart will be "transmittance vs. infrared spectrum". The bottom of the chart will have three dropdowns. Change "Reverse X" to "Normal X" and "cm-1" to "um (micro meter)".
This shows the transmittance signature of a particular gas. Our camera detects medium wavelength gases (between 3 and 5 micro meters). If the signature has a trough within that wavelenght range, the camera will pick it up. Anything above or below this range will not be detected. The camera detects "enes" (e.g., benzene), "anes" (e.g., methane) and "ones" (e.g., methyl ethyl ketone). It also does others that aren't yet FLIR lab verified.
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