Moisture content, estimation

Use the molecular weight ratio to calculate the apparent extent of reaction of the caprolactam in these systems. Is the variation in p qualitatively consistent with your expectations of the effect of increased water content in the system Plot p versus moisture content and estimate by extrapolation the equilibrium moisture content of nylon-6 at 255 C. Does the apparent equilibrium moisture content of this polymer seem consistent with the value given in Sec. 5.6 for nylon-6,6 at 290°C ... 

Estimating Minimum Sample Quantity for Moisture Measurement Estimates of material quantity for testing moisture content depend on mechanisms of moisture distribution in the material. Moisture is physically retained on particle surfaces, chemically adsorbed on surfaces and within pores of particulate solids, and contained as an internal constituent of solids. Significant internal moisture is most often encountered in organic and agricultural source materials. 

An incinerator will usually have a fuel of varying chemical composition and physical properties, as well as varying moisture content and heating value. Also, the fuel fired in one locality may be vastly different from that fired by an incinerator of similar size and design in another locality. Refuse production in the United States has been estimated to average 2.5 kg per person per day in 1970, increasing to 10 kg per person per day by the year 2000. 

Moisture-content determinations provide data for estimating soil compaction and compressibility. If a soil is saturated, no volume change can occur without intake or discharge of water. 

It is assumed that the moisture content of the soil has been determined to be approximately 50% under worst-case conditions. Using this information and the results from vendor tests, it has been determined that a minimum dose of one part solidification reagent to two parts soil is required for the migration control of lead. Testing has shown that the optimum solidification reagent mixture would comprise ca. 50% fly ash and ca. 50% kiln dust. Thus, ca. 7000 t (6364 T) each of fly ash and cement kiln dust would be required. The reagents would be added in situ with a backhoe. As one area of the soil is fixed, the equipment could be moved onto the fixed soil to blend the next section. It may be anticipated that the soil volume would expand by ca. 20% as a result of the fixation process. This additional volume would be used to achieve the required slope for the cap. An RCRA soil/clay cap placed over the solidified material is necessary to prevent infiltration and additional hydraulic stress on the fixed soil. It is estimated that the fixation would reduce lead migration by 40% and that the fixed soil may pass the U.S. EPA levels for lead. 

Combining solids that have previously been equilibrated at different relative humidities results in a system that is thermodynamically unstable, since there will be a tendency for moisture to distribute in the system so that a single relative humidity is attained in the headspace. As shown in Fig. 7, moisture will desorb into the headspace from the component initially equilibrated at a higher relative humidity and sorb to the component initially equilibrated at a lower relative humidity. This process will continue until both solids have equilibrated at the final relative humidity. The final relative humidity can be predicted a priori by the sorption-desorption moisture transfer (SDMT) model [95] if one has moisture uptake isotherms for each of the solid components, their initial moisture contents and dry weights, headspace volume, and temperature. Final moisture contents for each solid can then easily be estimated from the isotherms for the respective solids. 

Moisture content values estimated from the composite food isotherm (Figure 17) for 0.25 and 0.75 a, values. 

Weller, C.L., Paulsen, M.R., and Mbuvi, S. 1989. Germ weight, germ oil content, and estimated oil yield for wet-milled yellow dent com as affected by moisture content at harvest and temperature of drying air. Cereal Chem. 66, 273-275. 

Cost estimate for the Carlo Environmental Technologies, Inc., MTTD technology range from 30 to 69 per ton of soil or other material treated. Factors that influence costs are characteristics of the soil (most important) utility and fuel rates, and moisture content of the soil. The initial and target contaminant concentrations also affect costs (D101871, p. 28). 

In 1994, following pilot-scale studies on in situ corona (ISC), Pacific Northwest Laboratories (PNNL) estimated that the total costs for ISC would be II2/m of soil treated. This estimate is based on the treatment of four sites per year, with each site having a soil volume to be treated of 1570 m, a treatment depth averaging 10 m, and an initial moisture content of 15% (D116405, p. 816). Results are summarized in Table 1. 

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