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首页> 美国卫生研究院文献>ACS Omega >Catalytic Steam Reforming of Biomass-Derived AceticAcid over Two Supported Ni Catalysts for Hydrogen-Rich Syngas Production
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Catalytic Steam Reforming of Biomass-Derived AceticAcid over Two Supported Ni Catalysts for Hydrogen-Rich Syngas Production

机译：生物质衍生乙酸的催化蒸汽重整两种负载型镍催化剂上的酸可生产富氢合成气

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摘要

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 H2 and CO during CSR of HOAc were explored. Between 600 and 900 °C, the yields of H2 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–1. Elevating the reforming temperature up to 900 °C gave rise to the continuously increased H2 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 yieldcontinued to decrease with increasing WCMR from 1 to 7. Ni/MSA gavesimilar CO yield to the CNC. The Ni/MSA exhibited better ability toselectively generate hydrogen than the CNC, resulting in significantlyhigher hydrogen yield.
机译：研究了工业镍基催化剂（CNC）和玉米秸秆粉煤灰负载的镍催化剂（Ni / MSA）在富氢合成气生产中生物质衍生乙酸的催化蒸汽重整（CSR）。规模的固定床单元与NDIR / TCD技术相结合。开发了玉米秸秆灰负载的Ni催化剂用于HOAc的蒸汽重整。比较了CNC和Ni / MSA催化剂的化学组成和结构特征。探讨了HOAc CSR过程中H 2和CO的演化特征。在600至900°C之间，H2和CO的产率随时间呈相似趋势，首先迅速增加至峰值，然后开始下降，最后趋于稳定。最佳反应条件如下：温度= 800°C，水碳摩尔比（WCMR）= 3，重时空速（WHSV）= 5 h –1 。将重整温度提高到900°C，可以使H2产率不断提高，并提高了选择性氢气生产的催化剂能力。沉积在催化剂上的焦炭百分比降低了49.8％随着温度从600上升到900°C。一氧化碳产量WCMR从1增加到7持续降低。与CNC相似的CO产量。 Ni / MSA具有更好的抗氧化能力比CNC选择性地产生氢气，氢气产率更高。

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