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Table 6 Values of the free standard adsorption energy and the isosteric heats of adsorption

From: Sorption of BTEX on a nanoporous composite of SBA-15 and a calcined hydrotalcite

  Benzene Toluene p-Xylene Ethylbenzene
− ∆U0 − qst − ∆U0 − qst − ∆U0 − qst − ∆U0 − qst
SBA-15 4.766 9.294 8.997 18.926 6.848 25.921 15.743 32.897
HTC − 1.166 − 2.711 7.538 8.374 13.627 16.013 5.905 9.449
SBA-15/HTC25 4.348 7.182 10.926 13.341 2.094 13.631 2.109 17.438
  1. Standard adsorption energy (∆U0, kJ/mol) and isosteric heats of adsorption (qst, kJ/mol) of volatile organic compounds