-
全部
主办单位：煤炭科学研究总院有限公司、中国煤炭学会学术期刊工作委员会
Table2
还原温度对催化剂理化性质的影响
| Sample | RNi /% |
dNia /nm |
dNib /nm |
SNic /(m2·g−1) |
TOF / (10−3 s−1) |
Surface conc. d/% | Weak sitesf /(30−300 ℃) |
Moderate sitesf /(300−600 ℃) |
||
| Ni/Te | Mg/Te | Al/Te | ||||||||
| 550R | 57.2 | 4.1 | 4.0 | 5.4 | 4.6 (7.7%)* | 12.4 | 14.3 | 73.3 | 521 | 749 |
| 600R | 68.1 | 4.5 | 4.7 | 6.7 | 5.9 (13.1%) | 10.6 | 15.9 | 73.5 | 298 | 1162 |
| 650R | 89.7 | 5.0 | 5.1 | 8.6 | 5.4 (15.7%) | 10.0 | 18.9 | 71.1 | 641 | 986 |
| 700R | 100.0 | 6.9 | 7.0 | 4.5 | 4.8 (7.1%) | 9.4 | 18.6 | 72.1 | 463 | 1011 |
| 650R-sg | − | 8.9 | − | − | − | − | − | − | − | − |
| a：The particle size of Ni was estimated by Scherrer formula; b：The particle size of Ni is statistically determined based on TEM images; c：The Ni surface area is determined from low temperature peak in H2-TPD profiles; d：The relative surface content of the element is obtained by XPS; e：T = Ni+Mg+Al; f：The weak and moderate alkaline sites are obtained from the CO2-TPD results; *：The numerals in parentheses is the CO2 conversion in percentage during the TOF test; g：650R-s is the catalyst after stability test. | ||||||||||
Table1
Al2O3、NiMg/Al-LDH和400C的BET 比表面积、孔径、孔体积
| Sample | SBET/(m2·g −1 ) | Pore diameter/nm | Pore volume/(cm3·g −1 ) |
| γ-Al2O3 support | 201 | 5.0 | 0.40 |
| NiMg/Al-LDH | 218 | 4.9 | 0.34 |
| 400C | 226 | 5.7 | 0.37 |
主办单位：煤炭科学研究总院有限公司 中国煤炭学会学术期刊工作委员会