Fu Peng, Zhang Andong, Luo Shan, Yi Weiming, Hu Song, Zhang Yuchun
School of Agricultural Engineering and Food Science, Shandong Research Center of Engineering & Technology for Clean Energy, Shandong University of Technology, Zibo 255000, China.
School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
ACS Omega. 2019 Aug 9;4(8):13585-13593. doi: 10.1021/acsomega.9b01985. eCollection 2019 Aug 20.
The catalytic steam reforming (CSR) of biomass-derived acetic acid over the commercial Ni-based catalyst (CNC) and the maize stalk ash-supported Ni catalyst (Ni/MSA) for hydrogen-rich syngas production was studied by means of a bench-scale fixed-bed unit combined with NDIR/TCD techniques. A maize stalk ash-supported Ni catalyst was developed for steam reforming of HOAc. The chemical composition and structural characteristics of CNC and Ni/MSA catalysts were compared. Evolution characteristics of H and CO during CSR of HOAc were explored. Between 600 and 900 °C, the yields of H and CO showed a similar trend over time, which first increased rapidly to the peak value, then began to decrease and finally tended to stabilize. The optimal reaction conditions were as follows: temperature = 800 °C, water to carbon molar ratio (WCMR) = 3, and weight hourly space velocity (WHSV) = 5 h. Elevating the reforming temperature up to 900 °C gave rise to the continuously increased H yield and enhanced catalyst ability for selective hydrogen production. The percentage of coke deposited on the catalyst decreased by 49.8% with the rise of temperature from 600 to 900 °C. The CO yield continued to decrease with increasing WCMR from 1 to 7. Ni/MSA gave similar CO yield to the CNC. The Ni/MSA exhibited better ability to selectively generate hydrogen than the CNC, resulting in significantly higher hydrogen yield.
采用小型固定床装置结合非分散红外/热导检测（NDIR/TCD）技术，研究了生物质衍生的乙酸在商用镍基催化剂（CNC）和玉米秸秆灰负载镍催化剂（Ni/MSA）上的催化蒸汽重整（CSR）以生产富氢合成气。开发了一种用于乙酸蒸汽重整的玉米秸秆灰负载镍催化剂。比较了CNC和Ni/MSA催化剂的化学组成和结构特征。探讨了乙酸催化蒸汽重整过程中H和CO的演变特性。在600至900℃之间，H和CO的产率随时间呈现相似趋势，先迅速增加至峰值，然后开始下降，最终趋于稳定。最佳反应条件如下：温度 = 800℃，水碳摩尔比（WCMR） = 3，重量时空速（WHSV） = 5 h⁻¹。将重整温度提高到900℃导致H产率持续增加，并增强了催化剂的选择性制氢能力。随着温度从600℃升高到900℃，催化剂上积炭的百分比降低了49.8%。随着WCMR从1增加到7，CO产率持续下降。Ni/MSA的CO产率与CNC相似。Ni/MSA表现出比CNC更好的选择性产氢能力，从而产生显著更高的氢气产率。
