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  <xsd:element id="vtnr_PreferredStockConversionTermsPricePerShare" name="PreferredStockConversionTermsPricePerShare" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="instant" />
  <xsd:element id="vtnr_PreferredStockDividendsAverageoftheVolumeWeightedAveragePriceofCommonStockNumberofTradingDays" name="PreferredStockDividendsAverageoftheVolumeWeightedAveragePriceofCommonStockNumberofTradingDays" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="vtnr_PreferredStockDividendsAverageoftheVolumeWeightedAveragePriceofCommonStockPercentage" name="PreferredStockDividendsAverageoftheVolumeWeightedAveragePriceofCommonStockPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="vtnr_PreferredStockDividendsMinimumDividendStockPaymentPrice" name="PreferredStockDividendsMinimumDividendStockPaymentPrice" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="vtnr_PreferredStockTermsofConversionBeneficialConversionFeature" name="PreferredStockTermsofConversionBeneficialConversionFeature" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="vtnr_PreferredStockTermsofConversionBeneficialConversionFeatureIntrinsicValue" name="PreferredStockTermsofConversionBeneficialConversionFeatureIntrinsicValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="vtnr_PreferredStockVotingRightsAssumedConversionPrice" name="PreferredStockVotingRightsAssumedConversionPrice" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="vtnr_PreviousParticipatingInvestorsMember" name="PreviousParticipatingInvestorsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="vtnr_PrivatePlacementAmountRaisedfromVariousInvestorsforNoFee" name="PrivatePlacementAmountRaisedfromVariousInvestorsforNoFee" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="vtnr_PrivatePlacementCommissionsPercentageofGrossProceeds" name="PrivatePlacementCommissionsPercentageofGrossProceeds" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="vtnr_PrivatePlacementFees" name="PrivatePlacementFees" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="vtnr_ProceedsfromIssuanceofPrivatePlacementGross" name="ProceedsfromIssuanceofPrivatePlacementGross" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="vtnr_ProvisionforDoubtfulAccountsNotesReceivable" name="ProvisionforDoubtfulAccountsNotesReceivable" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="vtnr_RawMaterialsandFinishedGoodsMember" name="RawMaterialsandFinishedGoodsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="vtnr_RecoveryMember" name="RecoveryMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="vtnr_RefiningAndMarketingMember" name="RefiningAndMarketingMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="vtnr_RefiningMember" name="RefiningMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="vtnr_RestatedCreditAgreement2016Member" name="RestatedCreditAgreement2016Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="vtnr_SeriesB1PreferredStockMember" name="SeriesB1PreferredStockMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="vtnr_SummaryofGainonSaleofAssetsTableTextBlock" name="SummaryofGainonSaleofAssetsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="vtnr_Supplier1Member" name="Supplier1Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="vtnr_Supplier2Member" name="Supplier2Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="vtnr_TemporaryEquityAllocatedValueofPreferredStock" name="TemporaryEquityAllocatedValueofPreferredStock" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="vtnr_TemporaryEquityEffectiveConversionPricePerShare" name="TemporaryEquityEffectiveConversionPricePerShare" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="instant" />
  <xsd:element id="vtnr_TemporaryEquityIntrinsicValuePerShare" name="TemporaryEquityIntrinsicValuePerShare" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="instant" />
  <xsd:element id="vtnr_TemporaryEquityIssuanceCostsandFees" name="TemporaryEquityIssuanceCostsandFees" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="vtnr_TemporaryEquityUnaccretedDiscount" name="TemporaryEquityUnaccretedDiscount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="vtnr_TemporaryEquityWarrantsIssuedValue" name="TemporaryEquityWarrantsIssuedValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="vtnr_TexasCitizensBankLoanMember" name="TexasCitizensBankLoanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="vtnr_TexasCitizensBankMember" name="TexasCitizensBankMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="vtnr_UnitPurchaseAgreementLiquidatedDamagesPercentageofAggregateSubscriptionAmount" name="UnitPurchaseAgreementLiquidatedDamagesPercentageofAggregateSubscriptionAmount" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="vtnr_UnitPurchaseAgreementLiquidatedDamagesPercentageofAggregateSubscriptionAmountMaximum" name="UnitPurchaseAgreementLiquidatedDamagesPercentageofAggregateSubscriptionAmountMaximum" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="vtnr_UnitPurchaseAgreementNumberofSharesPerUnit" name="UnitPurchaseAgreementNumberofSharesPerUnit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="vtnr_UnitPurchaseAgreementNumberofUnitsAgreedtobePurchasedbyIndividual" name="UnitPurchaseAgreementNumberofUnitsAgreedtobePurchasedbyIndividual" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="vtnr_UnitPurchaseAgreementNumberofUnitsAgreedtobePurchasedbyIndividualValue" name="UnitPurchaseAgreementNumberofUnitsAgreedtobePurchasedbyIndividualValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="vtnr_UnitPurchaseAgreementNumberofUnitsSold" name="UnitPurchaseAgreementNumberofUnitsSold" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="vtnr_UnitPurchaseAgreementNumberofWarrantsperUnit" name="UnitPurchaseAgreementNumberofWarrantsperUnit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="vtnr_UnitPurchaseAgreementPercentageofProceedsUsedtoRepurchaseStock" name="UnitPurchaseAgreementPercentageofProceedsUsedtoRepurchaseStock" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="vtnr_UnitPurchaseAgreementPremiumOverClosingStockPricePercentage" name="UnitPurchaseAgreementPremiumOverClosingStockPricePercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="vtnr_UnitPurchaseAgreementPriceperUnit" name="UnitPurchaseAgreementPriceperUnit" nillable="true" substitutionGroup="xbrli:item" type="us-types:perUnitItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="vtnr_VariousInstitutionsMember" name="VariousInstitutionsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="vtnr_VertexRefiningLALLCMember" name="VertexRefiningLALLCMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="vtnr_VertexRefiningOHLLCMember" name="VertexRefiningOHLLCMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="vtnr_WarrantsIssuedBlackScholesModelValue" name="WarrantsIssuedBlackScholesModelValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="vtnr_WarrantsMember" name="WarrantsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="vtnr_WarrantsToPurchase" name="WarrantsToPurchase" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
</xsd:schema>


