home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: sci.chem
- Path: sparky!uunet!destroyer!cs.ubc.ca!newsserver.sfu.ca!sfu.ca!gay
- From: gay@selkirk.sfu.ca (Ian D. Gay)
- Subject: Re: Catalytic converters for cars - good or bad?
- Message-ID: <gay.722135330@sfu.ca>
- Keywords: Catlytic, ecology, greenhouse effect
- Sender: news@sfu.ca
- Organization: Simon Fraser University, Burnaby, B.C., Canada
- References: <arc5.75.722124421@chempc0.york.ac.uk>
- Date: Thu, 19 Nov 1992 01:08:50 GMT
- Lines: 16
-
- arc5@chempc0.york.ac.uk (Alastair Cargill) writes:
-
- >Hi
-
- >I have long wondered about the balance between the good a catalytic
- >converter does whilst in use on a car and the damage done to the environment
- >as a whole involved in its production in the first place.
- >To make a catalytic converter involves the use of very rare and presumably
- >hard to get at maetals such as rhodium and platinum and therefore to extract
- >them from the rock/ore/whatever must be very energy intensive and must
- >surely produce a lot of polution in this way.
-
- I don't think this is a major consideration. Most of the noble metals
- are recovered from ores which have been processed for more common
- metals, such as Ni and Cu, and the extra energy expenditure should be
- relatively small. Sorry, I don't have any hard figures.
-