On: Dutch brewery burns iron as a clean, recyclable fu...

[yetihehe]

It's simply due to cost. Heat is typically cheaper than electricity, but only because we use heat to generate electricity with some losses.

[jmelloy → yetihehe]

And also because externalities aren't priced in, like carbon amounts.

[namibj → jmelloy]

For industrial-scale methane/coal burning, sequestering 90% or maybe even more of the CO2 is still a lot cheaper than using electricity. Don't get me wrong: it costs around 10% of the thermal load in electricity (technically, driveshaft power for turbomachinery).