On 02/03/2019 18:11, Tim Streater wrote:
In article , Nightjar
wrote:

On 02/03/2019 17:14, Tim Streater wrote:
In article , Nightjar
wrote:

On 02/03/2019 16:34, harry wrote:
On Saturday, 2 March 2019 14:48:02 UTC, BroadbackÂ* wrote:
When I was a young man, a long time ago, bottles were glass and bags
were paper. Why cant the supermarkets revert to those? Bottles were
returned and paper used to light our fires. Then we moved to gas
(mainly) central heating, Now that is a no no. Incidentally what will
happen to the businesses that primarily sell gas appliances? Will
they
be compensated?

Domestic gas is to be banned in a few years.

If you call 30 years a few. Even so, biogas is being considered as
an acceptable alternative, so it might be more akin to the
changeover from town gas to natural gas than a complete end to gas
as a fuel.

What's so magic about biogas? How does it differ from methane?


It is renewable, uses no energy to produce it, reduces soil and water
pollution (as compared to landfill), has organic fertiliser as a
by-product and the production cycle captures methane, resulting in a
zero-emissions fuel.

Thanks for not answering my question which was, how does it differ from
methane. Are you implying that it doesn't?

If you were trying to describe how it's produced, you've not done that
either.


I did answer your question. I gave the differences that make biogas a
suitable alternative to fossil fuel gas. Those are the only relevant
differences that would affect its choice as a substitute.

However, its similarity to natural gas, in being a good source of
methane, would also make it a better choice than, say hydrogen. On
average, biogas contains slightly less methane than natural gas; 55-70%
cf 60-90%. However, the gas that reaches the consumer today has been
processed to be almost pure methane and, if that can also be done with
biogas, it could result in a seamless changeover.



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Colin Bignell