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weird and holistic concept. The concept we could power, water and supercritical CO as per scheme
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call “Buffalo’s Concept”, which means “zero waste” below.
for energy.
According to the studies of Professor Ishida (1) “
The ‘Buffalo’s Concept’ is a when the supercritical CO is pumped in the un-
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synergy of renewables and derground for HF (hydraulic fracturing), it induces
three-dimensionally sinuous cracks with many se-
“fossil fuels based on new condary branches, which seem to be more desi-
technologies currently available rable pathways for shale gas recovery than water
conventionally used for HF. He has pointed out the
following advantages of HF using supercritical CO
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The plain in the picture is currently a waste; not for shale gas recovery instead of water.
possible agriculture for contaminated land and un- (a) HF using CO could realize economical-
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derground. The basic idea of the article is a poten- ly viable CO sequestration, because large
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tial way to use this contaminated land. We could amounts of CO would remain underground
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think, fi rst of all, to install an Allam cycle power distributing across many wells even if only
plant and use the supercritical CO for shale gas a small amount of CO is used in each well
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extraction (1). injection,
The Allam cycle burn gas and oxygen; it generates (b) Because CO has higher affi nity for shale than
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