(663a) Study of the Hydrolysis of Rice Straw Using Phosphoric Acid,Amberlite Catalyst and Process Optimization Using RSM Methodology

Agricultural wastes are renewable, cheap and easily available sources of value added chemicals. Due to depletion of nonrenewable sources of energy, it is required to find out alternative ways to produce value added chemicals which are produced by petroleum refing process as byproducts. In this work, samples of milled rice straw were hydrolyzed with phosphoric acid in presence of amberlite catalyst under varying conditions of reaction time, reaction temperature, solid to liquid ratio and wt% of catalyst to find out the optimum  process condition to produce different sugars(xylose, arabinose, glucose) and decomposition products(furfural, hydroxymethyl furfural). Remaining solid mass, sugar concentrations and decomposition product concentrations were measured.  For measurement HPLC technique was used.  Different kinetic models were developed to describe the kinetics of products of reaction in varying reaction conditions . Different kinetic parameters were find out using regression method.These models were also compared with available models in the literature. Using experimental data, the process conditions were optimized by RSM methodology.