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. | ||||||||||
Table3
Table2
不同催化剂的合成气制乙醇催化反应性能a
| Catalyst |
CO conv./% | STYEtOH /(mg·mL−1·h−1) |
Product selectivity sb/% | Alcohol distribution w/% | Hydrocarbon distribution w/% | |||||||
| ROHc | CHnd | MeOH | EtOH | C3+OHe | C1 | C2 | C3+ | |||||
| MS | 14.1 | 13.5 | 68.8 | 31.2 | 66.5 | 22.5 | 11.0 | 57.2 | 26.1 | 16.7 | ||
| MOS-T | 18.9 | 18.9 | 69.6 | 30.4 | 64.3 | 23.6 | 12.1 | 55.3 | 27.7 | 17.0 | ||
| MOS-P | 22.5 | 32.0 | 71.4 | 28.6 | 55.2 | 29.1 | 15.7 | 62.5 | 23.1 | 14.4 | ||
| MO | 12.3 | 14.2 | 55.9 | 44.1 | 53.6 | 28.3 | 18.1 | 61.2 | 24.2 | 14.6 | ||
| a: Reactions were carried out at 320 ℃, 6.0 MPa, GHSV=4500 h−1, H2/CO =2, STY is space-time yield; b: CO2 free; c: ROH means total alcohols and d: CHn means total hydrocarbons; e: alcohols with carbon number above 3 were obtained in the product (propanol, butanol and pentanol). | ||||||||||||
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
