• 作者： Chen, Yin-Zu; Ling, K.S.
• 中文摘要： 本研究將P-1及P-2W硼化鎳觸媒負載於活性碳、氧化矽、氧化鋁等不同擔體上,在甲基碘之促進下進行甲醇羰基化反應探討。其中 P-1硼化鎳/活性碳觸媒具不錯的羰基化活性及穩性,能將大部分之甲醇轉化成醋酸及醋酸甲酯。P-1硼化鎳負載於其他擔體仍具羰基化活性但不及負載於活性碳,此不同於負載於非活性碳擔體之鎳觸媒,不具羰基化活性。此羰基化催化特性主要歸因於活性碳及硼對鎳原子之供電子效應,它促進甲基碘對鎳原子之氧化加成反應。甲醇羰基化反應於P-1硼化鎳/活性碳之反應速率不受甲醇及一氧化碳分壓之影響,對甲基碘分壓呈一階次,此反應基構類同於一般均相觸媒之反應機構。
• 英文摘要： Vapor-phase carbonylation of methanol on supported nickel borides was studied under pressurized conditions in the presence of methyl iodide promoter. The P-1 and P-2W nickel borides supported on activated carbon exhibited an excellent activity for converting most of methanol to carbonylated products. However, nickel borides supported on.gamma.-alumina, 13X-zeolite, or silica gel exhibited lower activity. This is contrary to the quite low activiity for pure nickel supported on these carriers. Electrons transfer between carbon and nickel, or between boron and nickel is assumed to be essential for the catalysis of nickel on carbonylation. The methanol carbonylation is first order in methyl iodide and zero order in both methanol and carbon monoxide over the activated carbon supported P-1 nickel boride. The carbonylation mechanism on it may be quite similar to that proposed for homogeneous complex catalysts.
• 中文關鍵字： 硼化鎳; 羰基化; 甲醇; 觸媒
• 英文關鍵字： Nickel Boride; Carbonylation; Methanol; Catalysts