information about Coal field
Field Hierarchy
Parent | |||
---|---|---|---|
Chemistry 29.5M papers | Engineering 25.7M papers | Geography 13.4M papers | Organic chemistry 13.2M papers |
History 8.1M papers | Archaeology 7M papers | Waste management 1.6M papers | |
Current | |||
Coal 293k papers | |||
Child | |||
Coal mining 95.6k papers | Char 35.2k papers | Coal combustion products 16.6k papers | Fluidized bed combustion 12k papers |
Energy source 11.6k papers | Pulverized coal-fired boiler 11.1k papers | Wood gas generator 10.1k papers | Coal gasification 9,020 papers |
Bottom ash 7,913 papers | Bituminous coal 7,865 papers |
Trends
Notes
History