57 results about "Differential heat" patented technology

Provided is a process for producing a regenerated hydrotreating catalyst by regenerating a spent hydrotreating catalyst in a prescribed temperature range, wherein the prescribed temperature range is a temperature range of T1−30° C. or more and T2+30° C. or less, as determined by subjecting the spent hydrotreating catalyst to a differential thermal analysis, converting a differential heat in a measuring temperature range of 100° C. or more and 600° C. or less to a difference in electromotive force, differentiating the converted value twice by temperature to provide a smallest extreme value and a second smallest extreme value, and representing a temperature corresponding to the extreme value on the lower-temperature side as T1 and a temperature corresponding to the extreme value on the higher-temperature side as T2.

There is provided a differential scanning calorimeter for exactly measuring a calorie variation of the measured sample on the basis of the temperature difference between sample container and the reference container without the influence of the heat irregularity incoming from the surroundings and the noise components. The differential scanning calorimeter includes a heating furnace of an approximately H-shaped section having an approximately drum-shaped wall part and an approximately plate-shaped heat inflow part, a heater disposed outside the wall part so as to heat the heating furnace, a approximately bar-shaped heat-resistance member that is arranged along the center axis L of the wall part, that protrudes from both sides of the heat inflow part by an approximately equal length, that is made of a material heat conductivity lower than that of the material of the heating furnace, a sample container disposed at one end of the heat-resistance member, a reference container disposed at the other end of the heat-resistance member, and a differential heat flow detector measuring a difference between the temperature of the sample container and the temperature of the reference container as a measured value.

A bi-layer, woven geotextile fabric has interwoven first and second layers. The first layer is over and under woven through the second layer in a pre-determined pattern so that the first layer has portions which face a first side of the second layer and portions which face a second side of the second layer. Monofilaments in the warp direction of the first layer have a pre-determined differential heat shrinkage characteristic that is greater than the monofilaments in the warp direction of the second layer. Closed cells defined by the pattern of the over and under weave are disposed on the first and second sides of the second layer. Shrinkage of the monofilaments in the warp direction of the first layer provide for a separation of a portion of the second layer from the first layer at the cells.

A differential scanning calorimeter apparatus includes reference and sample cells and controlled temperature shields. The temperature of the shields is controlled such that baseline curvature is reduced by eliminating heat flow from the furnaces to their surroundings (quasi adiabatic conditions) and by controlling heat flow through a well defined solid state heat resistance between the furnaces and a temperature controlled heat sink. The temperature of each shield can be controlled independently to reduce differential heat flow over the whole temperature range of the scan, or maintained at a constant temperature for conventional power compensated DSC operation. The temperature / time profile for each shield can be controlled according to actual furnace temperature, obtained from an empty run, or stored in the computer memory and recalled for sample measurements.

A differential scanning calorimeter has a heat sink for accommodating therein a measurement sample and a reference material, and a differential heat flow detector that detects a temperature difference between the sample and the reference material. A cooling mechanism cools the heat sink, and a thermoconductor is disposed between the cooling mechanism and the heat sink and forms a heat flow path between the two. A first heater heats the heat sink, and a second heater heats the thermoconductor to thereby heat the heat sink. The second heater begins operating before the first heater nears its rated maximum output power.