| 摘要 |
<p>PCT No. PCT/GB95/02276 Sec. 371 Date Apr. 7, 1997 Sec. 102(e) Date Apr. 7, 1997 PCT Filed Sep. 26, 1995 PCT Pub. No. WO96/13326 PCT Pub. Date May 9, 1996Regeneration of an adsorbent bed on to which impurity compounds, e.g. sulphur compounds, have been adsorbed by means of a gas stream to desorb the impurity compounds. The gas stream containing the desorbed impurity compounds is then passed over a catalyst, e.g. a hydro-desulphurisation catalyst, effective to cause the reaction of at least some of the desorbed impurity compounds with hydrogen to give a reaction product which is then removed by absorption using a bed of non-regenerable absorbent. At least some of the gas stream is then recycled to the adsorbent bed undergoing regeneration. Hydrogen is added in approximately the stoichiometric amount required for the reaction with the impurity compounds before the regeneration gas enters the catalyst.</p> |
