Also, there is peat. Peat is not actually coal, but rather the precursor to coal. Peat is a soft organic material consisting of partly decayed plant and, in some cases, deposited mineral matter. When peat is placed under high pressure and heat, it becomes coal.
When I was a kid in the mid-1960s, we moved to a house that had a pile of coal in the cellar—lump coal, nice big chunks with a clean cleavage and little dust. Who knows how long it had been there, perhaps 20 or 30 years. The current heating system was a fuel-oil furnace, and all trace of the coal furnace was long gone. Yet, it seemed like such a shame to throw it away. So for a while, my family revisited the 1800s, the days of King Coal, and burned coal at home.
Hard Coal vs Soft Coal
The present study aims at increasing the surface area of raw OFA through physicochemical treatment. The produced treated OFA is used for the adsorption of H2S. The success of such physicochemical activation in H2S removal is expected to lead to the utilization of OFA as low cost activated carbon for removal of toxic gases such as H2S.
We also manufacture boilers, which utilize water in contrast to air, and provide your home with an even, moist heat that is distributed consistently throughout your home.
Burning coal provided the necessary heat energy to convert a tank of water into steam. The steam was converted to mechanical energy and channeled out to power machines in industrial mills and factories. Therefore steam became the new form of energy source that substituted conventional water, wind, and animal-power operations. Steam-powered machinery such as the spinning jenny, a cotton spinning machine that revolutionized the textile industry by increasing human productivity and efficiency, helped boost cost-effective manufacturing  . Machine-made goods soon replaced handcrafted products as they were cheaper to produce and more consistent.
Coal in the Home
Anthracite is considered the cleanest burning coal available. It produces more heat and less smoke than other coals and is widely used in hand-fired furnaces. Some residential home heating stove systems still use anthracite, which burns longer than wood. Anthracite has been nicknamed “hard coal,” especially by locomotive engineers who used it for fueling trains.
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How Coal Burns
Coal is found all over the world including our country, predominantly in places where forests and marshes existed prehistorically, before being buried and compressed over thousands of years. Some of the largest deposits are located in areas of the Appalachian basin in the eastern U.S., the Illinois basin in the mid-continent region, and throughout the Rocky Mountain basins in the western U.S. according to The United States Energy Administration. Since our country accounts for 13% of the world’s coal production, a valuable resource to learn more about the top coal-producing regions in the United states is NS Energy. https://www.nsenergybusiness.com/features/top-five-coal-producing-states-us/
Data obtained from PLC BP (2019) .
According to an article published by American Geosciences, Anthracite, or “hard coal,” contains the highest amount of carbon out of all coal ranks (86%-97%) and makes up only 0.2% of coal production in the United States and is located in Northeastern Pennsylvania. Conversely, Bituminous coal, often called “soft coal,” has slightly lower carbon content than anthracite (45%-86%) and makes up 46% of all US coal production. The largest bituminous coal producers in the US are West Virginia, Illinois, Pennsylvania, and Kentucky. https://www.americangeosciences.org/critical-issues/faq/what-are-the-different-types-of-coal
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A historical perspective on industrial production and outlook
We had to get a cast-iron coal grate for the fireplace, then we had to learn to kindle and burn coal correctly. As I recall, we started with paper and kindling to get a hot start, then put smaller coal chips on it that would ignite quickly. Then we would pile larger lumps on, taking care not to smother or overload the fire, until we had built up a good pile of evenly burning coal. That would minimize smoke. You had to arrange things so that blowing on the fire wasn’t necessary—blowing on it just spread coal smoke through the house.
Our hand fired or traditional coal units use cast iron grates that are able to be manually shaken periodically, about every eight hours, to sift the ash, off the bottom of the fire. This is incredibly important because the air which supplies the fire with oxygen must come from underneath the fire through the grates. If too much ash accumulates under the fire, it will block the air flow. With a hand fired unit, it is the users responsibility to keep the fire fed with fresh coal and maintain the ash bed so that airflow is not restricted resulting in unburnt coal in the ash pan.