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在低温和浆态反应条件下,于同一个反应器中考察了由合成气一体化合成甲醇和甲酸甲酯的反应。结果表明,由碱金属醇化物和CuCl组成的混合催化体系具有甲醇合成活性,在比较温和的条件下(363~403K, 3~6 MPa)进行合成反应时,甲醇的空时收率可达到208 g·L~(-1)·h(-1)(363 K, 5.0Mpa)和43.8g·L~(-1).h~(-1)(添加氢化物助剂)。甲醇的选择性与反应温度有关。一体化合成反应与分步反应有较大差异。反应历程可能为甲醇首先均相催化羰化为甲酸甲酯,然后甲酸甲酯再多相催化氢解为甲醇。
Under the conditions of low temperature and slurry reaction, the reaction of synthesizing methanol and methyl formate from syngas was investigated in the same reactor. The results showed that the mixed catalyst system composed of alkali metal alkoxide and CuCl had methanol synthesis activity. Under the relatively mild conditions (363 ~ 403K, 3 ~ 6 MPa), the space time yield of methanol could reach 208 g · L -1 · h -1, 363 K, 5.0Mpa and 43.8 g · L -1, respectively. h ~ (-1) (adding hydride additives). The selectivity of methanol is related to the reaction temperature. Integrated synthesis and step-by-step reactions are quite different. The reaction process may be methanol first homogeneous carbonylation to formic acid methyl ester, and then methyl formate catalytic heterogeneous catalytic hydrogenolysis to methanol.