Talk:Gasification

message: The article mentions how gasification is an efficient process multiple times.  Can someone put some numbers on how efficient it is for particular feedstocks and products?!
90% conversion of tars and oils to CO and H2 with controlled oxygen injection
- per Thomas G. Kreutz et. al, as prepared for the 25th Annual International Pittsburgh Coal Conference, 29 Sept. - 8 Oct. 2008
...JR@Large.... 02:08, 28 July 2010 (UTC)
thread_title:  What exactly are the efficiencies? 

message: What is the air / steam flow co- and counter-current with, the motion of the fuel?  If the fuel moves, why is it called "fixed-bed"?  Thanks.
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The final resting area of char, that is currently undergoing the gasification processes, resides at a fixed bed depth (downdraft) N/cm from the original (raw unburnt feedstock (before heat and air where applied)), this final resting area is where the said char is completely reformed to (A)gas (producer, or syn gas) and (B)mineral ash (ash). At this point, the spent ash simply falls through the final bed retainment, and is replaced by more char that will undergo the same reforming process. The consumption or reforming process retains this level N/cm from the raw fuel area, by means of mecanical or gravity retention. Therefore the fuel is constantly moving to the said fixed bed.
 Side note: some "slipped char" also moves past the final bed area and is known as "spent char".
A31ford 12:12, 30 April 2006 (UTC)
thread_title:  Flow and fixed bed questions 

message: My visits to the UK left me wondering why there are so many abandoned gas works there. Why were they built (what was the advantage over using the fuels involved to generate electricity), why are so many of them still around, and what did they usually run on? The article explains how the process works very well, but since gasworks redirects here, it'd be nice to elaborate on the actual gas works themselves. Bz2
The reason that there would be old gas plants is that when natural gas was discovered in UK waters, old fashioned 'town gas' (from coal as I understand it) became uneconomical and so the gas works closed.  Having said that, I haven't noticed many abandoned gasworks but then I live in Scotland so I can't vouch for the whole of the UK.  Neither am I confident that I would know what a gasworks looked like!Ewan carmichael 13:06, 15 October 2007 (UTC)
replies: text: I think you will also find that the old gas works were pretty horrendously polluting. There were town gas facilities for municipal production but also dedicated facilities for factories. Many of the old gas works sites are highly polluted. In Stockport for instance the old gas works was demolished a number of years ago and a carpark built over the top with a shopping centre to seal in the pollutants. I think you will find most of them have suffered the same fate. Natural gas is much cleaner, safer and economical. You used to be able to commit suicide by poisoning yourself putting your head in the oven and turning the gas on.--Alex 13:27, 15 October 2007 (UTC)
replies: text: Town gas had many environmental problems, but the reason you could commit suicide by inhaling it was due to its content of carbon monoxide, which is otherwise not really an environmental concern. The town gas process produced loads of problematic carcinogenic tar (mainly PAHs), which can indeed kill you, but it generally takes decades die from cancer. Just to explain that the instant lethality of town gas is not directly related to it being less clean.
--Claus Hindsgaul 07:22, 16 October 2007 (UTC)
thread_title:  UK gas works elaboration 

message: A chemical reaction equation for this process needs to be presented in the article so that people know exactly what the inputs are, what the intermediate reactions are, and what the outputs of the process are. Could someone do that? AppleJuggler 04:47, 6 June 2007 (UTC)
thread_title:  We need the equation for this process written in the article 

message: We need a section in the article about regasification. (Could have a new article, but either article would not be very large.) WikiDon (talk) 00:55, 21 May 2008 (UTC)
thread_title:  Regasification 

message: TeH nOmInAtOr recently put a POV tag on the Potential for renewable energy section. I agree and found several factual errors and propaganda like misleading claims in it. I have tried to improve the section and ask if the POV tag can now be removed. Also, should we remove the mention of one of many gasification demonstration organisations? Güssing is indeed a very interesting case (I visited it myself in 2004), but should it be mentioned (alone) here?
--Claus Hindsgaul (talk) 10:03, 10 March 2009 (UTC)
replies: text: There's still a lot of work to be done. I'm starting to browse (crawl) all the energy articles to check for POV violations. You can help by looking at every single article in energy category and energy templates and reading. TeH nOmInAtOr (talk) 00:25, 12 March 2009 (UTC)

text: Indeed there is a lot of work to be done on Wikipedia, but can I remove your POV tag here?
--Claus Hindsgaul (talk) 07:07, 12 March 2009 (UTC)
thread_title:  Section: Potential for renewable energy 

message: Hi,
Somebody left at cleanup tag in the article with no explanation. Does anyone know the reason for this tag? If not, I suggest we simply delete it, as it serves no purpose without an explanation.
--Claus Hindsgaul (talk) 09:11, 24 July 2009 (UTC)
thread_title:  Cleanup tag 

message: Is it considered that gasification of waste is a specialised form of incinerator?
If that is so, the phrase: "Several gasification processes for thermal treatment of waste are under development as an alternative to incineration." could be changed to "...more basic forms of incineration".
("More basic" means "cruder" but that sounds a bit judgemental.)  —Preceding unsigned comment added by 94.194.151.102 (talk) 12:13, 16 October 2009 (UTC)
thread_title:  Waste disposal 

message: I suggest that:
# Plasma gasifiers be added as a separate type of gasifier under Gasification processes
# Fluidized bed reactor be subdivided into Bubbling fluidized bed (BFB, Circultaing fluidized bed (CFB) and Dual fluidized bed (Dual FB)
Sadly I don't know enough about these gasifiers to attempt to make the changes myself ...
--Andersneld (talk) 14:23, 22 June 2011 (UTC)
thread_title:  Gasifier types 

message: A major challenge for waste gasification technologies is to reach an acceptable (positive) gross electric efficiency.
Really important is the net efficiency that takes into account the consumption of the process including fuel preparation and gas cleaning.  — Preceding unsigned comment added by 212.203.109.254 (talk) 07:54, 24 August 2012 (UTC)
thread_title:  net/gross efficiency 

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thread_title:  External links modified 

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thread_title:  External links modified 

message: "This is achieved by reacting the feedstock material at high temperatures (typically >700 °C), without combustion, via controlling the amount of oxygen and/or steam present"
I suggest change to "without complete combustuion" e.g. the reaction 2C+O2=> 2 CO is clearly a combustion albeit not complete. 150.227.15.253 (talk) 14:14, 22 April 2022 (UTC)
replies: text: Totally agree Claus Hindsgaul (talk) 21:16, 24 April 2022 (UTC)
thread_title:  With partial combustion!