Abstract
Thermochemical conversion from biomass to higher alcohols is a promising route for manufacture of higher alcohols in an environmentally sustainable way. In this study, a production system of biomass gasification and subsequent higher alcohol synthesis was designed and simulated. Two core modules of the processes (biomass gasification and alcohol synthesis) were constructed, and the optimum reaction conditions were discussed in detail. The results showed that the lower ER (the equivalence ratio of oxygen/fuel) (ER = 0.2) could increase the CO content in the gasification product. By changing the mass ratio of steam to biomass (S/B), hydrogen-rich syngas could be obtained for higher alcohol synthesis. For the synthesis of higher alcohols from syngas, higher temperature was conducive to CO conversion but also can increase the content of byproduct such as CO2 and CH4. Higher pressure and H2/CO (1.0–2.0) were both in favor of the production of higher alcohols. Then the process simulation was based on two cases,...
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