It is an object of the present invention to provide a calorific value measuring device and a calorific value measuring method which enable highly reliable measurement of the calorific value of a by-product gas produced in a steelmaking process. In the present invention, with a by-product gas produced in a steelmaking process being employed as an object gas of which calorific value is to be measured, the refractive index and the sonic speed of the by-product gas are measured so as to compute a refractive index equivalent calorific value Q.sub.O from the value of the refractive index as well as a sonic speed equivalent calorific value Q.sub.S from the value of the sonic speed. On the basis of the concentration X.sub.CO of carbon monoxide gas contained in the by-product gas, an error calorific value Q.sub.CO is computed by Equation (1) below using a value selected within a range of 0.08 to 0.03 as a calorific value equivalent coefficient . On the basis of the refractive index equivalent calorific value Q.sub.O, the sonic speed equivalent calorific value Q.sub.S and the error calorific value Q.sub.CO which have been computed, the calorific value Q of the by-product gas is determined by Equation (2) below using a value selected within a range of 1.1 to 4.2 as a correction factor .

[00001]$\begin{array}{cc}{Q}_{\mathrm{CO}}=X_{\mathrm{CO}}.Math.& \mathrm{Equation}.Math..Math.\left(1\right)\\ Q=Q_0-\frac{Q_0-Q_S}{1-}-Q_{C.Math..Math.0}& \mathrm{Equation}.Math..Math.\left(2\right)\end{array}$

Methods of preparing high-density polyethylene (HDPE) nanocomposites by in situ polymerization with a zirconocene catalyst, a methylaluminoxane cocatalyst, a calcium zirconate nanofiller in a solvent. The calcium zirconate nanofiller, which is dispersed across the polyethylene matrix, is found to enhance catalyst activity, and other properties of the HDPE nanocomposites produced, including but not limited to flame retardency, crystallinity and surface morphology.

An open calorimetry system is configured to measure heat flow from, and power out of or into, a working substance. The working substance can interact with the environment, allowing heat and mass to enter and leave. The embodiments are configured to measure power over five orders of magnitude from 100 W to 50 W in a normal room temperature environment.

An open calorimetry system is configured to measure heat flow from, and power out of or into, a working substance. The working substance can interact with the environment, allowing heat and mass to enter and leave. The embodiments are configured to measure power over five orders of magnitude from 100 W to 50 W in a normal room temperature environment.

A sample holder for the measurement of nuclear heating in a nuclear reactor, comprises: a body configured to contain a heat-sensitive sample along a longitudinal axis; and means for removing heat from the body to the exterior of the sample holder, wherein the means for removing heat from the body to the exterior of the sample holder comprise: a peripheral structure located on the periphery of the body; and a central structure mechanically linking the body and the peripheral structure, the central linking structure being configured to transfer heat radially, i.e. perpendicularly to the longitudinal axis, between the body and the peripheral structure. A calorimeter cell for the measurement of nuclear heating in a nuclear reactor, comprises: at least one sample holder; a seal-tight casing in which the sample holder is placed; and temperature-measuring means.

A device which can be used as a flow reactor for synthesis and for discerning the reaction kinetics as well as a flow calorimeter is a need in the art. To fulfill this need, the invention discloses a simple calorimeter that functions as a device to measure reaction kinetics, preferably heat of reaction in a continuous manner, in adiabatic as well as in isothermal conditions. The distinct advantages of the device include online determination of thermokinetic properties, continuous determination of thermokinetic properties and applicable for determination in adiabatic as well as isothermal modes. The device may function independently or may be used in combination with reactors, micro reactors or tubular reactors.

In association with a method and a device for sensory measurement of a material sample, a measurement curve is used to detect deviations from the regular measuring characteristics of the device. A corresponding file can be made available to a service technician for evaluation.

In association with a method and a device for sensory measurement of a material sample, a measurement curve is used to detect deviations from the regular measuring characteristics of the device. A corresponding file can be made available to a service technician for evaluation.

Methods of preparing high-density polyethylene (HDPE) nanocomposites by in situ polymerization with a zirconocene catalyst, a methylaluminoxane cocatalyst, a calcium zirconate nanofiller in a solvent. The calcium zirconate nanofiller, which is dispersed across the polyethylene matrix, is found to enhance catalyst activity, and other properties of the HDPE nanocomposites produced, including but not limited to flame retardency, crystallinity and surface morphology.

Methods of preparing high-density polyethylene (HDPE) nanocomposites by in situ polymerization with a zirconocene catalyst, a methylaluminoxane cocatalyst, a calcium zirconate nanofiller in a solvent. The calcium zirconate nanofiller, which is dispersed across the polyethylene matrix, is found to enhance catalyst activity, and other properties of the HDPE nanocomposites produced, including but not limited to flame retardency, crystallinity and surface morphology.