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

* 9761591 Vempati 这一小型企业创新研究（SBIR）第一阶段涉及ZSM 5合成，一种硅质和疏水沸石，从水稻船体灰。 与燃烧稻壳相关的环境污染，加上稀缺性和填埋成本，给碾米厂主带来了处理问题。 稻壳船体灰（RHA）是硅质的，并且含有一些铝，因此，它是合成ZSM 5的天然候选物。 该项目将探索在没有模板物质的情况下由RHA合成ZSM 5，即，四丙基氢氧化铵或溴化铵用于工业气味控制。 由于化学品和处置成本以及合成产物的煅烧，模板物质占生产成本的50%。 初步分析表明，由RHA和无模板剂物种衍生的ZSM-5的成本可能是活性炭和非RHA ZSM-5的1/3。 此外，改性的亲水性沸石使用环境不友好的化学品进行脱铝。 一种具有商业吸引力的新来源ZSM 5，即，由RHA制造的，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。 该研究有望改善稻米加工业的环境问题并扩大市场。 ***

*** 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. ***