The Boc Group, Inc.

Andre Micke

Martin Bulow

Ramachandran Krish Krishnamurthy

Shuen-Cheng Hwang

Lesli B Cosey

Gas cylinders are filled with mixtures of gases comprising a minor component, which is to be present in the mixture at a concentration of 10% or less of the total volume of the cylinder, and a major component, which is to be present at a concentration greater than about 10% of the total volume, by charging the lighter component into a chamber of given volume to a pressure and at a temperature such that the volume provides the desired fraction of minor component in the gas mixture, and then flushing the minor component into the cylinder using major component gas as the flushing agent. The pressure at which the minor component volume is to be measured is preferably at or near the final pressure of the filled gas cylinder.

Method and apparatus for filling containers with gas mixtures

Filling a gas vessel by initially flowing gas into the vessel at a rate low enough to avoid sudden heating of the gas, then increasing the fill rate until the maximum fill rate is attained, then reducing the flow rate as the vessel approaches the filled condition.

Method of filling gas containers

A system for filling gas cylinders with a gas mixture having a desired gas composition which includes (a) a gas conduit whose inlet end is connected to two or more gas component supply lines, each provided with a flow adjustment device, and whose outlet end is connected to a gas cylinder filling system, and which is equipped with a gas analyzer, a cumulative gas flow measuring device and, upstream of the gas analyzer, a gas mixing device; and (b) a controller which has provision for receiving signals from the flow measuring device and the gas analyzer and for sending signals to each flow adjustment device. A method of filling gas cylinders with given quantities of the gas mixtures which includes cumulatively measuring the quantity of gas flowing through the conduit, periodically analyzing the gas mixture flowing through the conduit, periodically sending cumulative gas flow information signals and gas analysis signals to the system controller, and periodically sending flow adjustment signals to the flow adjustment devices to minimize the difference between the actual gas composition and the desired gas composition.

Dynamic gas cylinder filling process

A mechanism used in connection with determining a time resolved interaction between a target substance, for instance, an adsorbent and at least one agent, for instance, an adsorbate capable of interacting with the target substance. In accordance with the method the target substance and agent(s) are introduced into a sample vessel. At the same time, the target substance is oscillated within the sample vessel without changing the volume of the sample vessel. A concentration of one or more components associated with the time resolved interaction as a function of time is measured by measuring chamber pressure and simultaneously performing a mass spectroscopical analysis of chamber content at discrete time intervals. The target substance is oscillated by a mechanical movement which oscillates a sample holder configured to hold the target substance. The movement has a finger-like member, preferably formed by welded steel bellows and a curved member rotating within the finger-like member so that motion of the finger-like member does not change chamber volume and therefore effect the pressure measurements that are to be made in accordance with the method.

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Summit, NJ, United States of America

Andre Micke