EVEN CARBON NUMBER PARAFFIN COMPOSITION AND METHOD OF MANUFACTURING SAME
Paraffin compositions including mainly even carbon number paraffins, and a method for manufacturing the same, is disclosed herein. In one embodiment, the method involves contacting naturally occurring fatty acid/glycerides with hydrogen in a slurry bubble column reactor containing bimetallic catalysts with equivalent particle diameters from about 10 to about 400 micron. The even carbon number compositions are particularly useful as phase change material.
1 . A phase change material composition comprising at least 75 wt % even carbon number paraffins, wherein the paraffins are produced by hydrogenation/hydrogenolysis of naturally occurring fatty acids and esters.
2 . The composition of claim 1 comprises at least 80 wt % even carbon number paraffins
3 . The composition of claim 1 wherein the even carbon number paraffins comprise n-hexadecane and n-octadecane.
4 . The composition of claim 1 wherein the even carbon number paraffins comprise n-octadecane and n-docosane.
5 . The composition of claim 1 wherein the even carbon number paraffins comprise n-dodecane and n-tetradecane.
6 . The composition of claim 1 wherein the composition is used in thermal storage devices.
7 . The composition of claim 1 wherein the composition is used as feedstock to produce even carbon number n-paraffin products.
8 . The composition of claim 1 wherein the hydrogenation/hydrogenolysis occurs in the presence of a catalyst containing nickel, molybdenum, cobalt, and/or tungsten.
9 . The composition of claim 8 wherein the catalyst has an equivalent diameter of about 400 microns or less.
10 . The composition of claim 8 wherein the catalyst has an equivalent diameter of about 80 micron or less.
11 . The composition of claim 10 wherein the hydrogenation/hydrogenolysis occurs in slurry phase.