无烟燃料燃烧时不冒烟。
英国的很多城市都有“洁净空气区”，在这些地区工厂和家庭只能燃烧无烟燃料。
Most cities in Britain have introduced "Clean air zones", whereby factories and households are only allowed to burn smokeless fuel.
霍林河褐煤热解半焦灰分较低，发热量较高，可用于水泥厂、电厂等作燃料，也可制成型焦作为造气原料或无烟燃料。
The ash of char is low, and the caloric content of coal gas is high. So it can be used as fuel in cement plant and power plant, or made into briquette as the gas-making material or fuel without smoke.
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