As-received moisture

Each of these is reported in the proximate analysis. Coal analyses can be reported on several bases as-received, moisture-free (or dry), and mineral-matter-free (or ash-free). 

The various forms of moisture in coal are described according to the manner in which they are measured by some prescribed standard method. These forms are (1) inherent moisture, (2) surface or free moisture, (3) total moisture, (4) air-dry loss moisture, (5) residual moisture, (6) as-received moisture, (7) decomposition moisture, and (8) water of hydration of mineral matter. 

As-received moisture moisture present in a coal sample when delivered. 

Indeed, at this point a distinction should be made between the natural bed moisture of coal and the as-received moisture of coal. The natural bed moisture of coal is the amount of water that a particular coal will hold when it is fully saturated at ca. 100% relative humidity (i.e., at the conditions approximating those of an undisturbed coal seam). It is also considered to be an indication of the total pore volume of the coal that is accessible to water. On the other hand, the as-received moisture content of coal relates to the amount of water in the coal at the time the coal is received for analysis. This may be somewhat smaller than the natural bed moisture, especially if the coal has been allowed to dry partially. In contrast, excessive amounts of surface moisture on the coal could lead to values for as-received moistures that are in excess of the natural bed moisture. 

Proximate analysis The determination by prescribed methods of moisture, volatile matter, fixed carbon (by difference), and ash unless specified, proximate analyses do not include determinations of sulfur or phosphorous or any determinations other than those named proximate analyses are reported by percent and on as-received, moisture-free, and moisture- and ash-free bases. 

Coal analyses are reported on severalbases, and it is customaiy to select the basis best suited to the application. The as-received basis represents the weight percentage of each constituent in the sample as received in the laboratoiy. The sample itself may be coal as fired, as mined, or as prepared for a particular use. The moisture-free (diy) basis is generally the most useful basis because performance calculations can be easily corrected for the ac tual moisture content at the point of use. The dry, ash-free basis is frequently used to approximate... 

The final plant layout combines the various engineering considerations for soil conditions drainage railroad, truck and services access raw materials receiving waste materials removal climate effect on outdoor versus indoor operations and on types of structures prevailing wind direction for vent as well as climiatic moisture corrosion plant expansion and growth access to public, and many other general evaluation points. From these broad considerations the details are developed to suit the particular plant process and the combined effects of the location. 

As-received is applicable for combustion calculations moisture-free and mineral-matter-free, for classification purposes. 

Plasma gasification is a generic-type process that can accommodate virtually any input waste material in as-received condition, including liquids, gases, and solids in any form or combination. Also, moisture content is not a problem. Liquids, gases, and small particle-size waste materials are very easily and efficiently processed. Bulky items, such as household appliances, tires, and bedsprings, can also be readily accommodated without loss of destruction efficiency. The reactor vessel and waste feed mechanism are designed for the physical characteristics of the input waste stream. Even waste materials such as low-level radioactive waste can be processed to reduce the bulk and encapsulate the radioactive constituents to reduce leachability. 

Note if determinations of certain volatile elements such as mercury or selenium are required it is necessary to carry out these analyses on the wet sample as received (to avoid loss of element by drying at 105°C). The dry weight of material in the sample is obtained by determining moisture in a separate position of the sample and applying a correction to the sample weight used in metals determination. 

Palladium hydroxide on carbon (moist, Pd content 20%, dry weight basis, moisture content <50%) was purchased from Aldrich Chemical Company, Inc., and used as received. 

The raw materials used in this study are presented in Table 1. The polyether polyol and short chain diols were degassed at 80-90°C under vacuum overnight to remove any moisture. MEK was treated with molecular sieves 4A overnight to remove any moisture prior to use. The other materials were used as received. 

Note If the size of the proplnt as received would unnecessarily prolong the time required for the determination, the specimen may be cut as specified in Method 509=3= The cutting, weighing, and transferring to the stoppered balloon flask must be done rapidly to minimize the change in moisture content thru exposure to the atmosphere... 

AD = air dried AR = as received DRY = moisture free DAF = dry, ash free (moisture free and ash free) DMF = dry, mineral free (moisture free and mineral free)... 

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