Table 5 Contents of several typical metal impurities in fresh and used catalysts with different reaction cycles under methane and nitrogen.

From: The interactive role of methane beyond a reactant in crude oil upgrading

Catalyst

Al (wt%)

Ca (ppm)

V (ppm)

Ni (ppm)

MOU

3.42 (3.42)

42

21

30

Cat-M1

3.42 (3.10)

97

113

87

Cat-N1

3.42 (3.08)

107

124

91

Cat-M2

3.42 (3.08)

109

121

151

Cat-N2

3.42 (3.06)

131

125

190

Cat-M3

3.42 (2.90)

116

129

198

Cat-N3

3.42 (2.89)

147

144

205

  1. Al is used to calibrate the content of other elements on the basis of fresh catalyst and its content is therefore identical in all catalysts (the original content is given in parenthesis).
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