A carbon pyrolyzate material is disclosed, having utility as an adsorbent as well as for energy storage and other applications. The pyrolyzate material comprises microporous carbon derived from low cost naturally-occurring carbohydrate source material such as polysaccharides. In adsorbent applications, the carbon pyrolyzate may for example be produced in a particulate form or a monolithic form, having high density and high pore volume to maximize gas storage and delivery, with the pore size distribution of the carbon pyrolyzate adsorbent being tunable via activation conditions to optimize storage capacity and delivery for specific gases of interest.

This invention relates to a method and system for increasing the utilization of the supply of acetylene from two acetylene sources. The flow is provided at a substantially constant delivery pressure to a point of use, such as a customer point of use. A portable apparatus is configured to operably connect to each of the two acetylene sources simultaneously and during operation automatically provide flow from one of the acetylene sources through various valving and piping assembled onto the portable apparatus followed by supply to a customer point of use.

This invention relates to a method and system for increasing the utilization of the supply of acetylene from two acetylene sources. The flow is provided at a substantially constant delivery pressure to a point of use, such as a customer point of use. A portable apparatus is configured to operably connect to each of the two acetylene sources simultaneously and during operation automatically provide flow from one of the acetylene sources through various valving and piping assembled onto the portable apparatus followed by supply to a customer point of use.

This invention relates to a method and system for increasing the utilization of the supply of acetylene from two acetylene sources. The flow is provided at a substantially constant delivery pressure to a point of use, such as a customer point of use. A portable apparatus is configured to operably connect to each of the two acetylene sources simultaneously and during operation automatically provide flow from one of the acetylene sources through various valving and piping assembled onto the portable apparatus followed by supply to a customer point of use.

A carbon adsorbent adapted for adsorptive storage and subsequent desorptive release of a decomposition-susceptible gas is described. Such carbon adsorbent comprises porosity in which mesopore volume is less than 0.25 cm.sup.3/gm of carbon adsorbent, in which the porosity comprises at least 80% by volume micropores, and at least 65% by volume of the micropores have pore diameter in a range of from 0.3 to 0.72 nm. The carbon adsorbent has a nitrogen adsorption BET surface area greater than 800 m.sup.2/g of carbon adsorbent, measured at 77 K, and a bulk density that is greater than 0.55 g/cc of carbon adsorbent. The carbon adsorbent can be utilized in gas storage and dispensing packages of varying type, to provide a safe and reliable source of decomposition-susceptible gas, e.g., acetylene for applications such as gas welding/cutting applications, atomic absorption spectroscopy applications, chemical synthesis and microelectronic products manufacturing.

Polymeric compositions and processes of forming the same are discussed herein. The processes generally include contacting a polylactic acid with a reactive modifier selected from epoxy-functionalized polybutadiene, ionic monomer, and combinations thereof.

Polymeric compositions and processes of forming the same are discussed herein. The processes generally include contacting a polylactic acid with a reactive modifier selected from epoxy-functionalized polybutadiene, ionic monomer, and combinations thereof.