The densities and reaction heats of methanol synthesis system from cornstalk syngas
Methanol can be used as possible replacement for conventional gasoline and Diesel fuel. In order to produce methanol, it is necessary to decompose biomass ,including cornstalks, which is a raw material from agricultural residues. A promising route for processing cornstalks is made cornstalks gasficated with thermochemical method to prepare the syngas, which has been conducted under a down-flow fixed bed gasifier. While the low-heat-value cornstalk gas produced in the down-flow fixed bed gasifier needs purified and a variety of technical procedures such as deoxygenation, desulfurization, catalytic cracking of tar and hydrogenation. In this paper, the catalytic experiments of methanol synthesis with cornstalk syngas were carried out in a tubular-flow integral and isothermal reactor. The effect of reaction temperature, pressure, catalyst types, catalyst particle size, syngas flow at entering end and composition of syngas was determined. The experimental results indicated that the proper catalyst of the synthetic reaction was C301 and the optimum catalyst size (φ) was 0.833 mm×0.351 mm. The optimal operating temperature and pressure were found to be 235℃ and 5 MPa, respectively. The suitable syngas flow 0.9 -1.10 mol/h at entering end was selected and the suitable composition of syngas were CO 10.49%, CO2 8.8%, N2 37.32%, CnHm 0.95% and H2 40.49%. The methanol yield is 0.418 g/g cornstalk. Moreover ,the densities, state equation parameters and the total reaction heat △HT, P, of methanol reacting system was calculated by SHBWR state equation under given reaction pressure. The calculation results provided basic data for the design of the industrial equipments in which catalyzed synthesis of methanol from cornstalk gases is operated.
methanol production cornstalk syngas density reaction heat
Ling-feng ZHU Lei DU Qing-ling ZHAO Xin-bao LI Zhe WANG Yu-ping ZHANG
Department of Environmental Engineering, North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou 450011,China
国际会议
The 12th Asian Pacific Confederation of Chemical Engineering Congress(第十二届亚太化工联盟大会暨化工展览会)
大连
英文
2008-08-04（万方平台首次上网日期，不代表论文的发表时间）