Talk:Catalytic converter

message: This article presently lacks any discussion or image of the bead (or pellet) catalytic converter configuration as used on GM (and possibly AMC) vehicles from 1975 through much later than one would think. This is a fairly serious omission; let's have some omission control. —Scheinwerfermann T·C03:11, 11 February 2012 (UTC)
replies: text: I might be able to dig up some free images, I know some people who may be willing to make a donation :) But it may take a while, I'm in the middle of moving. UrbanTerrorist (talk) 04:33, 14 June 2012 (UTC)
thread_title: Bead-type converters

message: Please add a diagram (or make one) of the internal structure of a typical catalytic converter.--Gauravjuvekar (talk) 14:00, 13 February 2012 (UTC)
replies: text: Are you going to pay for me to do a CAD drawing? If you are, I'll happily do one. If you just want to look, you can see a basic drawing here. UrbanTerrorist (talk) 04:48, 14 June 2012 (UTC)
thread_title:  add diagram 

message: I recall reading somewhere  that some of the modern sealed automotive batteries contain a platinum coated wire that converts H2 and O2 gases (a result of overcharging a lead-acid battery) back to water vapor.   Is this true?   This suggests another catalytic reaction that is not indicated in the article.   Someone with expertise - please verify and update article accordingly. --96.244.244.244 (talk) 01:53, 9 August 2012 (UTC)
replies: text: Perhaps it's true—I've never heard of such a thing, but I'm not a car battery expert. If a reliable source can be found to support the assertion, that information would belong not in this article but in automotive battery and/or Lead-acid battery. —Scheinwerfermann T·C01:29, 15 September 2012 (UTC)
thread_title:  Platinum in car batteries? 

message: reference 27 is a New York Times article and not a serious reference; the section gives a negative impression - it should be made clear that there was a huge improvement in air quality since the introduction of catalytic converters; catalytic converters have essentially no influence on CO2 emissions thus the first two phrases on CO2 and global warming have no point here. 131.211.44.165 (talk) 17:36, 4 October 2012 (UTC)
replies: text: Er…sorry, anonymous editor, but the New York Times is an unassailably reliable source. —Scheinwerfermann T·C00:17, 5 October 2012 (UTC)
replies: text: Source is good, NYT is more accurate them most, but the article is obsolete, from May 29, 1998. It was correct when written, but things have changed since then. I'll update the section, and cite the data on the Environmental Protection Agency website. UrbanTerrorist (talk) 04:43, 14 November 2012 (UTC)
thread_title:  Environmental impact 

message: Removed - explanation is in the main body of the article. UrbanTerrorist (talk) 04:44, 14 November 2012 (UTC)
thread_title:  CITE Request on Diesel Engines not using 3-Way converters 

message: I'm not really sure how to add a missing citation to the wiki, but #26, http://www.bnl.gov/ps/about/everyday/catalytic.asp leads to a 404.  moeburn (talk) 13:50, 24 December 2013 (UTC)
thread_title:  Missing citation 

message: A new paper has identified automotive catalytic converters as a source of carbon nanotube pollution, found in the upper airways of asthmatic Parisians. It seems the converters are very similar to a well-known CNT production technique using high-pressure carbon monoxide. LeadSongDog come howl! 15:46, 30 October 2015 (UTC)
thread_title:  Carbon nanotube production 

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thread_title:  External links modified 

message: The sentence ---> "These three reactions occur most efficiently when the catalytic converter receives exhaust from an engine running slightly above the stoichiometric point. For gasoline combustion, this ratio is between 14.6 and 14.8 parts air to one part fuel, by weight." <--- is rather poor / confusing. Cat's chemical reactions work best when cycled slightly rich and lean (above and below 14.7). Can someone tidy up this and make it clearer. I hope I'm not thick, I understand the principals not really the chemistry (that bit can come later by clever people) - thanks.  — Preceding unsigned comment added by 109.145.20.92 (talk) 10:21, 27 August 2017 (UTC)
thread_title:  "Efficiency" and "above the stoichiometric point" 

message: It would be nice to know the (approximate) value of the precious metals. As well as I know, they are in very thin layers on beads, or some other high surface area material. That the amount in any one converter is pretty small. Presumably worth recycling, but is it really valuable enough for so many CC thieves? Gah4 (talk) 02:03, 5 January 2022 (UTC)
thread_title:  value 

message: Catalytic converter required for above car 82.36.82.98 (talk) 10:03, 15 February 2022 (UTC)
replies: text: This is Wikipedia, not autozone.  Go look up your car parts on their site. 2601:410:8002:1AE0:CD45:7679:49C5:19B1 (talk) 01:02, 10 September 2023 (UTC)
thread_title:  Catalytic converter BMW Z4 2005 

message: Passenger cars got cats in model year 1975, when did light trucks start?  How about heavy duty trucks? Anyone able to fill in a little more history here?
Thank You
24.102.129.229 (talk) 14:55, 17 February 2022 (UTC)
thread_title:  history 

message: In Europe, they had G-Kat and U-Kat for a while - both are three-way catalytic converters, but the U is "unregulated." It does not have a lambda sond, but just sends the exhaust through the catalyst. This article, however, does not mention these and also does not contain the word "lambda", which seems like an oversight. Beyond my technical expertise to write about; someone please help!  Mr.choppers | ✎  03:54, 17 January 2024 (UTC)
thread_title: Questions not answered in the article

message: For 2-way converters that don't reduce nitrogen oxides, as well as I know it, EGR was used, which reduces combustion temperature and so nitrogen oxide production. Gah4 (talk) 21:33, 17 February 2024 (UTC)
thread_title:  [[Exhaust gas recirculation|EGR]]