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Table 5 Langmuir and Henry model parameters for volatile organic compound (VOC) adsorption in SBA-15, HTC, and SBA-15/HTC25

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

VOCs T (°C) SBA-15 HTC SBA-15/HTC25
a m K L K H R L a m K L K H R L a m K L K H R L
Benzene 300 0.059 0.852 0.05 0.99 0.05 0.586 0.029 0.93 0.068 0.915 0.062 0.993
260 0.06 0.872 0.052 0.994 0.052 0.468 0.024 0.935 0.067 0.935 0.062 0.993
225 0.059 1.012 0.06 0.988 0.049 0.577 0.028 0.907 0.067 1.168 0.076 0.991
185 0.063 0.919 0.058 0.984 0.05 0.559 0.028 0.916 0.071 1.021 0.073 0.992
150 0.069 1.025 0.071 0.988 0.048 0.564 0.027 0.95 0.081 1.04 0.084 0.996
Toluene 300 0.048 1.026 0.049 0.974 0.042 0.701 0.029 0.906 0.052 1.00 0.052 0.91
260 0.051 1.179 0.06 0.99 0.041 0.583 0.024 0.898 0.055 1.188 0.065 0.99
225 0.053 1.271 0.067 0.991 0.039 0.583 0.023 0.922 0.059 1.272 0.075 0.991
185 0.064 1.075 0.068 0.992 0.04 0.629 0.025 0.95 0.07 1.11 0.077 0.996
150 0.067 1.538 0.103 0.989 0.039 1.23 0.048 0.974 0.131 0.564 0.074 0.997
p-Xylene 300 0.042 1.335 0.056 0.981 0.036 0.524 0.019 0.885 0.047 1.469 0.07 0.988
260 0.043 1.316 0.057 0.981 0.011 2.58 0.028 0.898 0.049 1.498 0.074 0.99
225 0.046 1.514 0.069 0.984 0.035 0.675 0.023 0.922 0.064 1.178 0.075 0.997
185 0.067 1.509 0.102 0.999 0.036 1.002 0.036 0.962 0.070 1.122 0.079 0.998
150 0.078 1.117 0.092 0.981 0.033 1.635 0.055 0.972 0.124 0.666 0.082 0.991
Ethylbenzene 300 0.041 1.185 0.048 0.965 0.033 0.987 0.033 0.818 0.048 1.387 0.066 0.977
260 0.044 1.379 0.06 0.976 0.034 1.089 0.037 0.866 0.051 1.258 0.065 0.981
225 0.046 1.7 0.078 0.99 0.035 0.644 0.023 0.925 0.054 1.33 0.072 0.989
185 0.062 1.701 0.105 0.999 0.035 0.974 0.034 0.962 0.081 0.921 0.074 0.998
150 0.120 1.317 0.16 0.999 0.035 1.535 0.052 0.972 0.101 1.069 0.108 0.998
  1. Langmuir monolayer capacity am (mmol/g), adsorbent’s maximum adsorption capacity, Henry constants KH (mmHg−1), Langmuir KL (mmHg−1), and RL linear correlation coefficient