SBIR Phase I: Siliceous Zeolite from Rice Hull Ash for Industrial Odor Control

这项小型企业创新研究（SBIR）的第一期研究涉及从稻壳灰合成zsm5，一种硅质疏水沸石。燃烧稻壳造成的环境污染，再加上稀缺性和填埋成本，给碾米厂业主带来了处置问题。稻壳灰（RHA）为硅质，含铝，是合成zsm5的天然候选材料。本项目将探索在没有模板物质（即四丙基氢氧化铵或溴化铵）的情况下，从RHA合成zsm5用于工业气味控制。由于化学和处理成本以及合成产品的煅烧，模板品种占生产成本的50%。初步分析表明，未经RHA模板的zsm5的成本仅为活性炭和非RHA zsm5的1/3。此外，改性亲水性沸石采用对环境不友好的化学物质进行脱铝。一种具有商业吸引力的新来源zsm5，即由RHA制造，可能具有应用于有机化合物的可渗透屏障和挥发性有机化合物的捕获的潜力。这项研究有望改善环境问题并扩大大米加工行业的市场。＊＊＊

*** 9761591 Vempati This Small Business Innovation Research (SBIR) Phase I deals with ZSM 5 synthesis, a siliceous and hydrophobic zeolite, from rice hull ash. Environmental pollution associated with burning rice hulls, coupled with scarcity and landfilling cost, creates disposal problems to rice mill owners. Rice hull ash (RHA) is siliceous and contains some aluminum, and therefore, it is a natural candidate for ZSM 5 synthesis. This project will explore ZSM 5 synthesis from RHA in the absence of templating species, i.e., tetrapropylammonium hydroxide or bromide for industrial odor control. Templating species account for as much as 50% of production cost because of chemical and disposal costs and calcination of the synthesized product. Preliminary analysis indicates that ZSM 5 derived from RHA and without templating species may cost 1/3 as much as activated carbon and non-RHA ZSM 5. Further, modified hydrophilic zeolite uses environment unfriendly chemicals for dealumination. A commercially attractrive new source ZSM 5, i.e., manufactured from RHA, may have a potential for applications in permeable barriers for organic compounds and capture of volatile organic compounds. This research is expected to ameliorate environmental problems and expand markets in the rice milling industry. ***