Three news stories this week cover the gamut of fuels used by the cement industry in North America.
First we had an example of the changing trends in fossil fuel usage when TruStar Energy announced a deal to supply compressed gas to Argos USA. Then we moved to an example of recycled fuels used in co-processing when chemical waste firm ChemCare trumpeted its 100 million gallon milestone (that's 379,000m3 to the rest of the world) in supplying fuel-quality waste to the Lafarge co-processing subsidiary Systech Environmental. Finally, Cemex rounded off the main fuels groups with renewables, when it released pans to build a US$600m wind farm project in north-east Mexico.
Obviously fossil fuels still dominate in kilns north of the Darian Gap, as they do almost everywhere else, and fuel buyers wouldn't be doing their job properly if they weren't searching for the next best deal. Yet the range here shows a dynamic industry.
Jan Theulen from HeidelbergCement pointed out one example in the US at the recent Global CemFuels Conference held in Vienna. Here, rising landfill prices are increasing opportunities for alternative fuels use alongside changing US Environmental Protection Agency (EPA) permitting for solid recovered fuel. Alternative fuels consultant Dirk Lechtenberg, in an interview with Global Cement Magazine in February 2014, singled out the US as one country that is developing its alternative fuels use. As he explained, "Even though the fossil fuel prices are quite low in the US, the industry is developing supply chains for alternative fuels to be more independent with their fuels sourcing."
This race between cheaper fossil fuels in the US (via shale gas) and increasing development in alternative fuels is fascinating. Specifically: why is it happening now? Gas prices have fallen and demand for cement is returning in the US. The annual mean Henry Hub natural gas spot price in the US fell from US$8.86/million BTU in 2008 to a low of US$2.75/million BTU in 2012. This compares to up to US$15/million BTU in Japan and US$9/million BTU in Europe.
Public environmental pressure made manifest by the policies of the EPA and general increased knowledge about co-processing may be factors for the surge in alternative fuels investment. Long lead times for alternative fuels schemes may be another. Planners making a decision about what fuels mix to pursue in 2008 at the start of the recession might well have bet on alternatives to spread their risk. Yet the cause could be something else, as shale gas takes over higher paying industries, such as electrical generation, and the cement industry continues to be priced out of the leftovers.
Ultimately what burns in a cement kiln comes down to price. Depending on how the shale gas market plays out in North America it would be ironic if 'frackers', the bogeymen of current environmentalists, inadvertently cleaned up the cement industry.