Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai 400076, India.
Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai 400076, India.
Bioresour Technol. 2019 Feb;273:159-168. doi: 10.1016/j.biortech.2018.11.007. Epub 2018 Nov 5.
The present work studies gasification of high ash biomass (20-25% w/w), high ash coal (30-35% w/w), and their co-gasification in a downdraft gasifier developed in our earlier study (Siddiqui et al., 2018). TGA studies were performed to examine the change in performance due to the catalytic effect of inorganic content. The effect of biomass ratio (BR) was examined. Higher percentage of biomass increased the conversion to gas on carbon basis, and decreased the conversions to char and tar. The presence of coal enhanced the temperature and hence the rates of the reactions to certain extent. The respective cold gas and thermal efficiencies for BR0 are 33.06% and 49.38%, and for BR1 are 52.22% and 64.15%. BR0.75 gave the best performance with CGE of 57.5% and thermal efficiency of 72.63%. Finally, the clinker formation issue and the preliminary atmospheric emissions measurements are reported for gasifier.
本工作研究了高灰分生物质（20-25%w/w）、高灰分煤（30-35%w/w）及其在我们早期研究中开发的下吸式气化炉中的共气化（Siddiqui 等人，2018）。进行了 TGA 研究以检查由于无机含量的催化作用而导致的性能变化。研究了生物质比（BR）的影响。生物质的比例越高，碳基转化为气体的比例就越高，而转化为炭和焦油的比例就越低。煤的存在在一定程度上提高了温度，从而提高了反应速率。BR0 的相应冷煤气和热效率分别为 33.06%和 49.38%，BR1 的相应冷煤气和热效率分别为 52.22%和 64.15%。BR0.75 的性能最佳，CGE 为 57.5%，热效率为 72.63%。最后，报告了气化炉的结渣问题和初步的大气排放测量结果。
